Bridges characterised by the cross-section of their bearing spanning structure (E01D2)

E   Fixed constructions(158970)
E01D2                 Bridges characterised by the cross-section of their bearing spanning structure(698)
E01D2/02 - Of the i-girder type(4)
E01D2/04 - Of the box-girder type(25)
ethod for strengthening cracked metal thin-wall element of span structures of bridges // 2642758
FIELD: construction.SUBSTANCE: strengthening method includes drilling a hole at the crack mouth, applying a solder, installing strengthening elements in the form of straps installed on both sides of the metal element, and local heating to the melting point of the solder. The hole in the crack mouth is drilled with a diameter of at least two sheet thicknesses, a paste-like solder is applied to the strap surface, and a mushroom-shaped strap is installed by inserting its stem into the hole. The clearance between the strap stem and the beam wall in the hole is 0.2-0.25 mm, the pressing force is not less than 0.2 MPa. The strap due to the solder adhesion with the base metal is involved in the joint work with the main element. Its cross section is not only not weakened, but is also strengthened by increasing the cross-section with the straps. While heating, in the hole area (the metal is expanded into the hole), additional compressive stresses slowing downing the crack development are created.EFFECT: increasing the operational reliability of a span structure with a crack in the wall of the main beam, which extends predominantly from a seam fastening a stiffener thereto.3 dwg

ethod for strengthening the bridge superstructure // 2640855
FIELD: construction.SUBSTANCE: method involves drilling at least two holes in the diaphragms of adjacent superstructure beams along the entire amplified section; installation of strand bundles in holes drilled in the diaphragms; tension and fastening of strand bundles by anchoring elements on the extreme diaphragms; drilling in the upper plates at the joints of adjacent beams, in the area of voids between the diaphragms of the holes, the number of which depends on the number of voids between the diaphragms; formwork under the diaphragms of adjacent beams; filling the voids between the diaphragms with concrete through the holes in the top slabs of adjacent beams and formwork dismantle after the concrete has hardened.EFFECT: strengthening of the bridge superstructure.2 dwg

Soil-backfilled bridge // 2638218
FIELD: construction.SUBSTANCE: bridge structure is made prefabricated of fibrous concrete elements equipped with embedded parts and a structure of plates and a geogrid, that allows to distribute vertical pressure from the rolling stock to the unpressurized arch zone. Supports are made prefabricated, mounted on a grillage combining the piles, and a parabolic-shaped arch made of fibrous concrete and consisting of separate blocks hingedly connected to one another along the outer arch surface rests on the supports. On the upper surface of each block, there are niches in its corners, in which there are metal embedded lugs, two pieces in a niche on one side of the block, and four - on the opposite side; each lug has an opening for the bolts, the axis of which coincides with the point of intersection of the lateral and the upper surface of the blocks. On the contacting surfaces of each block, projections are made on one side, and recesses on the other side, which are combined during the installation of the arch, the central part of which is the unpressurized zone, i.e. not experiencing lateral bearing reaction of the soil. Sandy cushions are placed on the boundaries of the unpressurized zone, on which transitional reinforced concrete slabs rest, a layer of sand is poured onto the slabs; after its compaction, a polymeric geogrid with a slope from the vertical axis of the arch to the side of the bridge supports is placed within the soil backfilling cage. Road pavement layers are laid over the sand. The bridge facade along the entire height is laid out with gabions interconnected by reinforcement, the last row of which serves as a guard rail, the gabions being installed during the arrangement of the soil cage of the bridge backfilling.EFFECT: simplifying the installation of bridge structures, reducing eccentric loads on the arch, increasing the strength of load-bearing elements by using fibrous concrete.7 dwg
ethod of strengthening cracked metal element of span structures of bridges // 2633936
FIELD: construction.SUBSTANCE: method of strengthening involves drilling a conical opening in the crack mouth, installing a conical plug into the opening, and rigidly attaching it to the metal element. Before installing the plug in the opening, solder is applied on its conical surface, and it is fixed by means of induction soldering. The plug due to the adhesion of the solder with the base metal is included in the joint work with the main element. The cross-section of the metal element is not weakened, and while cooling, additional compressive stresses are created in the crack area, which slow down the crack development.EFFECT: increasing the operational reliability of the span structure with a crack in the wall of the main beam.4 dwg

ethod for bridge structure reconstruction // 2617751
FIELD: construction.SUBSTANCE: method of the bridge structure reconstruction includes the installation of temporary supports on temporary piles, the installation of thrust and supporting crossarms. The temporary supports are installed in pairs from different sides of the bridge structure, after which a thrust crossarm is mounted on each pair of the temporary supports across the bridge structure. Thereinafter, the through openings are drilled in a beam of the bridge structure, and then the bundles of ropes are stretched, first through the thrust crossarm, then into the through openings of the beam of the bridge structure, then through the supporting crossarm previously arranged on the ground under the beam of the bridge structure. Jacks are installed on the thrust crossarm at the points of the rope bundles output, and the supporting crossarm is pulled up with the beam resting on it. Then the existing ropes stretched in the upper slab along the entire bridge structure are strained. Then the inner surface of the lower slab of the beam is reinforced by laying rope bundles into pre-made longitudinal channels along the entire bridge structure, and then these rope bundles are strained and fixed. The thrust and supporting crossarms and the supports with the piles are dismantled.EFFECT: reinforcing the existing span structure of the bridge.3 dwg

ethod of concrete slab span rail bridge reconstruction // 2613227
FIELD: construction.SUBSTANCE: invention relates to method of concrete slab span rail bridge reconstruction by increasing the longitudinal sides of the ballast trough plate by concreting. The method envolves the use of anchors to form the reinforcing framework of longitudinal side extension piece, which consists of the transverse reinforcement attached to the anchors, and joint at the top by the longitudinal reinforcement.EFFECT: invention allows to increase the carrying capacity of the longitudinal side and provide railway track lateral stability.2cl, 2 dwg
Device for introducing a force into tension elements made of fiber-reinforced plastic flat strip plates // 2612390
FIELD: construction.SUBSTANCE: invention relates to a device (1) for creating pre-stress in the clamping elements (2), made from fiber-reinforced plastic flat strip plates with clamping element (3), which is located on the tension element (2) and has at least one contact surface interacting with a tension element (2), as well as at least one rigid sleeve (4), that is located, at least around one clamping element (3) and the tension element (2) and thus, by means of clamping element (3) applies a compressive pressure to tension element (2).Clamping element (3) is made of plastic, which has a module of elasticity in the range of 1,000–5,000 MPa, tensile strength in bending ≥ 25 MPa and ultimate compression strength ≥ 25 MPa.EFFECT: creation of pre-stress in clamping elements.15 cl, 13 dwg
Construction method of cable-stayed bridge above sea navigable strait // 2612050
FIELD: construction.SUBSTANCE: when testing in construction of span bridge almost complete safety of each full cycle of supply of beams for mounting is provided, as well as safety of personnel occupied in these operations. Essence: special method of towing of floating system (3) and applied equipment is used – tow type (5, 6), length of towing ropes (7, 8), special cleats (9, 10), floating ice mooring buoys (16), saith-hook (27), leading units (49). Casement signs (43, 44),made for specific operations. Maneuvering in operating zone of mounting and positioning for mounting lifting unit (37) are secured using instead of GPS, casement marks, installed in operating zone of bridge construction on both sides. Invention can be used for transportation of metal stiffening girders of bridge flight using floating system (3), its attachment by dead anchors (12) with help of floating ice mooring buoys (16) and saith-release gear (27) and subsequent positioning in operating zone of construction under mounting lifting unit, mounted on end of bridge cantilever at height of 70 m to lift beams at elongation of bridge cantilevers at both sides of spillage to their coupling. Time for one cycle of beam removing is decreased from 5–6 hours to two hours, which promotes clear and smooth running of bridge construction schedule and significant saving of funds.EFFECT: technical result is reliable and safe all operations in process of implementation associated with loading of metal beams of bridge flight, such as transportation of floating system, its fixation on dead anchors with further positioning of floating system for mounting lifting unit in difficult weather conditions, including wind, storm excitement, change of currents with semidiurnal nature and operating under significant angle to axis of bridge, as well as impact of ice, broken by passing vessels and brought out by current.11 cl, 14 dwg

ethod of increase of bearing capacity of bridge support body // 2609510
FIELD: construction.SUBSTANCE: method for increasing the bearing capacity of the bridge support body includes drilling of grooves along the outer circumference of the element to be strengthened, installation of rods, installation of enclosing strands, their bracing and applying of polymer solution. The grooves are drilled in the bottom of the support along its outer circumference, and the number of recesses is calculated from the bearing ability of the support. Then the calculated amount of holes is drilled in the support body and anchors are arranged in them. Into the grooves drilled in the bottom of the support, the reinforcing profile rods are glued, their length is no less than the support height. The rods are fixed on the support body by the anchors installed earlier. Before installing the enclosing strands made of high-strength reinforcement, the level of their installation is calculated. After that, at this level the additional anchor blocks are installed which are fixed on a support body with reinforcement anchors. Then the enclosing strands are installed and pulled together by jacks, and their ends are fixed on the anchor blocks and tightened by collet anchors. Then, the resultant structure consisting of the support itself, the rods of reinforcing profile and bundling enclosing strands is covered, for example, by guniting, with layers of the polymer solution of special composition.EFFECT: strengthening of reinforced concrete massive supports of bridges.3 dwg

ethod of reconstruction and reinforcement of steel-concrete composite simply supported bridge superstructure by straight cables // 2608378
FIELD: construction.SUBSTANCE: invention can be used for reconstruction and reinforcement of existing steel-concrete composite simply supported bridge superstructures with spans of up to 63.0 m. Method of reconstruction and reinforcement of a steel-concrete composite simply supported bridge superstructure by straight cables comprises replacement of a reinforced concrete plate, reinforcement of main beams, repair, replacement or increasing the number of devices combining the plate with metal structures, and reinforcement of the main beams walls with additional stiffening ribs, herewith the main beams reinforcement is performed by installation of straight cables located above the lower belts of the main beams, and which after arranging the new reinforced concrete plate remain on the beams and maintain extending beyond the anchor ends of the cables for lifting the cables before completion of the construction works on the bridge superstructure and recovery of the rated capacity of the bridge superstructure.EFFECT: technical result is more complete usage of reserves of materials strength, reduction of restrictions for vehicles moving under the bridge and improved operating conditions and higher safety of works on metal structures reinforcement.1 cl, 2 dwg

Hybrid span structure with prestressed beams from polymer composite material and reinforced concrete slab from above // 2604539
FIELD: construction.SUBSTANCE: invention relates to bridge engineering. Hybrid span structure with prestressed beams from polymer composite material and with reinforced concrete slab above consists of, at least two identical beams, connected by lateral braces and reinforced concrete slab included into beams operation using metal thrusts. Beams are made from polymer composite material and each is formed from arranged in two or three tiers polymer composite shapes, each having wall and two flanges, connected to each other along adjoining planes and connected by lateral braces made in form of diaphragms from polymer composite shapes. During making of beams tiers are preliminarily bended for creation of camber and prestress and combining into finished beam in cambered position. Beams are separated by joints on section with length, making part of span length, and beams camber is created due to their profile knees at splicing points and preliminary sections bending within their length or without preliminary bending.EFFECT: use of polymer composite material as beams material for hybrid span structure reduces structure weight, lighten bridge supports, lowers cost of transport and construction operations; use of identical beams as span structure structural element, allows to produce simple design with minimum number of mounts of different types; tier-like segmentation of beams enables to design them from standard composite shapes; use of diaphragms as lateral braces between beams enables to make diaphragms from same as beams composite shapes; preliminary beams tiers hogging to create camber and tiers connection to each other in cambered state creates prestress in beams, which allows to reduce total stresses from all loads and due to it reduce material consumption; beams segmentation into separate sections, which length is part of span length, makes it possible to organize their delivery to country's hard-to-reach areas by any type of transport.1 cl, 3 dwg

Span from boxy boarded-block-dowel-nail units with reinforced concrete board // 2574240
FIELD: construction.SUBSTANCE: span is made of boxy boarded-block-dowel-nail units installed onto supports according to a transverse slope diagram, combined with a transverse reinforced concrete slab, laid directly onto the insulating surface of units and fixed by bolts to belt bars. The reinforced concrete slab is made of two mirror-symmetrical assembled units combined to each other along the axis of the bridge with a longitudinal seam from monolithic reinforced concrete. In transverse direction the units have bevelled edges, which form a deformation joint, sealed by means of "mostoplast", on top of which there is asphalt concrete coating. In the span each boxy unit operates for bending from a part of temporary load in accordance with laws of elastic distribution, depending on stiffness of the transverse structure formed by a system of non-split transverse reinforced concrete slabs elastically joined to boxy units.EFFECT: increased reliability.3 dwg

ethod of reinforcing of cracked metal element of bridge superstructures // 2562622
FIELD: construction.SUBSTANCE: invention relates to bridge building. The method of reinforcing includes the installation of gussets in a crack zone and their rigid connection to a metal element. Initially the crack is countersunk at the angle 60-80° to the depth 2-3 mm, the soldering paste is applied on the countersunk crack, then the gussets are placed with the gap within 0.4-0.5 mm, pressing the latter to the metal element with the force 0.1-0.2 MPa with further local heating up to solder melting temperature.EFFECT: prevention of development of cracks and reinforcing of walls of metal main beams and longitudinal beams of bridge superstructures.2 cl, 5 dwg

ethod of cable-belt assembly of arc spans // 2562311
FIELD: construction.SUBSTANCE: method relates to the field of construction and is designed for assembly of large structures by labour saving devices. Drastically reduces mass of the structure and time of its assembly. A stretched frame belt is formed between supports temporarily separated by height. The lifted end side is lowered into the lower position, providing for directed compression of the frame belt. In process of this technical operation the frame belt randomly bends and assembles into an arc span.EFFECT: increased efficiency of the method.2 dwg

Device for lifting and installation of bridge units // 2560012
FIELD: construction.SUBSTANCE: device for lifting and installation of bridge units includes a bearing beam with front and back supports, a mechanism for lifting of the bridge units fitted with hydrojacks with a system of interception of bunches. The bearing beam is fitted with an additional load-lifting mechanism consisting of traction winches, carriages with a system of by-pass blocks (tackles), fixed stoppers and bypass rollers. The rope from a drum of each traction winch passes through a bypass roller, the system of by-pass blocks of the carriage tackle and is fixed on the fixed support. In the middle part of the bearing beam a temporary support is located which is rigidly attached by the lower end on the assembled part of the span and fitted in the upper part with hydrojacks interacting with the lower belt of the bearing beam. The lower part of the front support is hingedly attached to the assembled part of the span, and the upper part is rigidly attached to the bearing beam. The back support is hingedly attached to the bearing beam and assembled part of the span. The front support can be variable by height by means of built-in spacers.EFFECT: design improvement.2 cl, 3 dwg

ethod for transverse relocation of bridge superstructure for extended collar beam // 2557020
FIELD: construction.SUBSTANCE: first, a collar beam is extended on both sides of supports. After that, the lower flange of the existing structure is reinforced and lifted and rollers are installed under the lower flange. Then, jacks are installed and the existing superstructure is relocated with jacks in transverse direction of bridge supports. After that, rollers are removed and traffic flow is arranged on the relocated existing superstructure. After that, on the free part of the supports with the extended collar beam, near the relocated existing superstructure there installed is a block of the main beam of the first part of a new superstructure; then, the next block is installed, and blocks of the first part of the new superstructure are combined. After that, a cantilever orthotropic plate is installed and the first part of the new superstructure is provided with road pavement. Then, traffic flow is shifted to the first part of the new superstructure. After that, the existing superstructure is removed. Removal of the existing superstructure is performed at several stages: first, cantilevers are removed; after that, reinforced-concrete slabs are cut and removed; then, each beam is removed separately. In the place of the removed existing superstructure there installed is the block of the main beam of the second part of the new superstructure; then, the next block is installed, and blocks of the second part of the new superstructure are combined; after that, a cantilever orthotropic plate is installed. The first part of the new superstructure is combined with the second part of the new superstructure with a reinforced-concrete slab and provided with road pavement and enclosures.EFFECT: improved method.2 cl, 8 dwg

Bridge reconstruction method using transverse relocation of existing reinforced-concrete solid superstructure // 2556766
FIELD: construction.SUBSTANCE: first, a collar beam is extended on one of the sides of the existing supports of the existing superstructure; after that, some part of the existing superstructure is cut (along the whole superstructure); then, the existing superstructure is lifted and rollers are installed under its lower flange; after that, jacks are installed and the existing superstructure is relocated across the existing supports of the bridge in the direction of the extended collar beam; then, rollers are removed and traffic flow is arranged on the relocated existing superstructure; after that, new supports are installed, which do not coincide in a plan view with the existing supports; after that, a new superstructure is installed on new supports; then, the existing superstructure and the existing supports are removed and the new bride superstructure is provided with road pavement.EFFECT: improved method.6 dwg

ethod of dismantling of damaged beam of bridge span // 2549664
FIELD: construction.SUBSTANCE: damaged beam is cut into separate elements of a beam, then the bearing spreader bars are mounted, with their supporting through bearing elements on two neighbouring beams, then subspreader bars are mounted, slinging holes are drilled in a horizontal plate of the damaged beam, then with rods through slinging holes the bearing spreader bars are combined with the beam elements and subspreader bars, after that rods a re pulled and the beam elements are lifted, then beam elements are transported to the spreader bar dismantle after that spreader bars are dismantled and beam elements are transported to the utilisation place. Cutting of the damaged beam into separate elements of the beam is performed by the diamond tool. All works are performed locally, without disturbing operations of the site unaffected by repair. The place of mounting of bearing spreader bars and subspreader bars per each beam element is determined by calculations. Beam elements a re lifted by cranes with the respective loading capacity.EFFECT: lower costs.3 cl, 2 dwg

ethod to install arch // 2541010
FIELD: construction.SUBSTANCE: method to install an arch consists in preliminary installation of binding beams, installation of temporary supports of alternating height onto them and serial assembly of arch elements with support against temporary supports. Additional temporary supports of alternating height are mounted on the binding beam at the low level, two side half-arches are assembled on them without support areas, as well as the middle part of the arch, from arch elements Then two side half-arches are hingedly fixed to the middle part of the arch, forming a hinged branch of the arch, afterwards weight-lifting devices are mounted on temporary supports, the hinged branch of the arch is rested on them in a hinged manner, and with the help of weight-lifting devices it is raised to the design height. After installation of support areas and combination of the binding beam and the arch with the help of arch filling the temporary supports are dismantled.EFFECT: reduced labour costs in arch installation.4 dwg

Technological complex for erection of hydraulic engineering work // 2540602
FIELD: construction.SUBSTANCE: invention relates to devices for the performance of works in hydraulic engineering construction and can be used for erection of bridge pile foundations, platforms, transhipping complexes and berthing facilities in water areas. A technological complex for the erection of a hydraulic engineering work (HEW) comprises a working platform 1, a set of tools for its erection. The HEW includes the pile piers 2 with a grillage 3 mounted on them, made of slabs. The service platform 1 is designed in the form of a longitudinal horizontal building slipway, equipped with equipment and assembly elements for the installation of HEW. The set of tools for the erection of the HEW includes a lifting device, a device for mounting the pile supports of the HEW foundation with the section buildup of the HEW grillage openings and a module of final assembly works. The lifting device is designed as a crane for heavy loads 5. The device for mounting the pile supports includes an aligning frame 6, aligned by the crane 5 to the horizon on a design axis by length and width of the span, with an external conductor 7 mounted on it. One end of the aligning frame 6 is installed on a transverse metal girder 8 of the HEW span already mounted, and the second external end is installed on two pairs of support columns 9 and 10 provided with hydraulic actuators. The first pair of the support columns 9 is installed on the ground of bottom vertically, and the columns of the second pair 10 are installed at an angle of 15-20° to the vertical columns 9. The conductor 7 is provided with apertures 11 designed in the form of sleeves to arrange the pile piers 2 in the design position by means of the crane 5 with subsequent their immersion with precast shell to the desired depth into the ground of the bottom and by fixing with retainers disposed in the apertures of the conductor 7. At the upper ends of the pile piers 2 there is a transverse metal girder 8, mounted by the crane 5 and fixed by a weld joint. Metal orthotropic plates 4 are installed and fixed by weld joints on the transverse girders 8 of the HEW sections already mounted and remounted. At the ends of the transverse metal girder 8 of the HEW span already mounted, a pair of temporary support jacks for supporting the additional support pairs of columns 13 and fixed by a weld joint, is provided. The additional support pairs of columns 13 are designed integrally with the conductor frame 6 and arranged in pairs on its bottom side along the longitudinal beams 12 with a step in accordance with formula: l = L / (n + 1), where l - distance between the pairs of additional support columns, L - length of the conductor frame, n - number of pairs of additional support columns.EFFECT: expansion of arsenal of hardware and trouble-free operation when changing the length of spans, reduction of construction terms and reduction of the work complexity.3 cl, 1 dwg

ethod to expand bridge clearance using cable-stayed system // 2539466
FIELD: construction.SUBSTANCE: method to expand a bridge clearance using a cable-stayed system, in process of which a split span is changed into a non-split span, is characterised by the fact that additional elements are installed, namely, traction rods, metal plates, then pylons with cable stays are installed. Traction rods are installed between adjacent beams of the split span and are fixed, then metal plates are installed in areas of connection of adjacent beams and a support crossbar, and they are combined with adjacent beams and crossbars of supports by means of an anchor joint. Then pylons are erected at both sides of the span, with a support against the area of ground under the bridge, afterwards cable stays are installed and tightened, and supports are dismantled.EFFECT: increased reliability.6 cl, 5 dwg

ethod to expand bridge structure using cable system // 2539461
FIELD: construction.SUBSTANCE: method includes installation of additional elements: amplifying crossbars, pylons, additional transverse and longitudinal beams and cable guys; which are combined with elements of the existing bridge structure. At first the upper part of each support is reinforced with a reinforcing crossbar, afterwards pylons are installed in pairs with crosspieces in the upper part of pylons on side protruding parts of the lower parts of supports, in the area of main vertical beams. Then they install additional transverse beams and cover them with additional longitudinal beams, then they install devices for fastening of cable guys, afterwards they tighten and fix cable guys, and then lay the door surface and install barriers.EFFECT: invention provides for the possibility to expansion and reinforcement of a bridge structure without termination of its operation.2 cl, 7 dwg

Device to reinforce building structures using composite stressed reinforcement // 2539460
FIELD: construction.SUBSTANCE: in a device of structure reinforcement with the help of composite material tapes, comprising a composite material tape, ends of which are connected to anchor assemblies comprising support plates fixed on a reinforced concrete beam, add-on plates to clamp ends of the tape, at the same time one of anchor assemblies is made as capable of connection to a system of lengthy tape tensioning in longitudinal direction, the composite material tape is equipped with ends installed on it and connected to brackets installed on support plates of anchor assemblies, and connection of ends with brackets is made in the form of hinged joints, which allow for rotation of tape ends relative to the beam in case of its deformations. Besides, one of tape ends is made with an eye that carries a cardan connected by other end to the eye of the bracket in one anchor assembly, and the other end is made with a threaded hole for a threaded rod, passing with a gap via a hole of the bracket of the other anchor assembly, at the same time the threaded rod by one end is screwed into the threaded hole of the end, and on the other end it carries washers, a nut and lock-nut for its fixation relative to the bracket. Besides, ends are made with flat sites and are equipped with add-on plates for fixation on the tape by means of bolts, at the same time on clamping surfaces of add-on plates and flat sites there are accordingly grooves made, which stretch in direction perpendicular to the longitudinal line of the lengthy tape and arranged in parallel to each other and preferably with the same pitch between them.EFFECT: development of a device for reinforcement of a building structure by reinforcement from polymer composite material on the basis of high-strength artificial fibres, providing for reduced costs for installation and operation, having increased reliability in operation, increased service life.2 cl, 5 dwg

Removal method of bridge superstructure using cable-supported system // 2534557
FIELD: construction.SUBSTANCE: invention relates to bridge construction, and namely to a removal method of a bridge superstructure using a cable-supported system. The removal method of the bridge superstructure using a cable-supported system involves preliminary construction of an H-pylon on the lower boom in a pedestrian zone of the superstructure like a self-mounted tower crane, which exceeds height of the superstructure; suspension of the superstructure with stay cables and tightening of stay cables, disassembly of some part of abutment piers till the level of the superstructure and installation of a cable-stay launching girder on one side of the superstructure, and installation of a moving-out device on the other side, after that, jacking of the superstructure and its installation on rollers; after that, moving out of the superstructure as a whole to the shore on jigs prepared in advance and further disassembly of the superstructure.EFFECT: invention allows performing removal without any additional devices, relieving water area as quick as possible, and disassembling the bridge onshore within a shorter period of time without any additional equipment.6 cl, 6 dwg

Removal method of girder reinforced-concrete superstructure of bridge using cable-supported system // 2534556
FIELD: construction.SUBSTANCE: invention relates to bridge construction, and namely to a bridge removal method and device. The removal method of a girder reinforced-concrete superstructure of a bridge using a cable-supported system allows removing the superstructure as quick as possible from its location and a possibility of removal of the superstructure onshore due to the fact that hydraulic jacks are installed under the lower flange for jacking; after that, channels are installed under the lower flange of girders; then, a metal traverse is installed; after that, the traverse is combined with channels; a pylon is installed on the traverse; stay cables are suspended and tightened; after that, supporting parts of girders are replaced with a moving device; the superstructure is removed together with the formed assembled structure onto receiving jigs arranged onshore, and the superstructure is disassembled. Channels for the lower flange of girders are installed in longitudinal direction. The traverse is installed along the whole superstructure of the bridge to be disassembled. The traverse and the channels are combined by means of vertical tie-rods with further welding to each other. The pylon is installed for example in the middle of the superstructure. As the moving device, rollers or fluoroplastic gaskets are used.EFFECT: invention allows improving removal efficiency due to removal of the superstructure as quick as possible from its location place and possibility of its onshore disassembly.7 cl, 5 dwg

ethod to install support parts on railway spans // 2533513
FIELD: construction.SUBSTANCE: invention relates to the method of installation of support parts on railway spans, consisting in installation of mobile and fixed support parts on the mobile and fixed axes of span resting. Some mobile support parts are made as movable in all directions, and one of them is linearly movable in longitudinal direction. Support parts that are movable in all directions are installed in pairs on the mobile and fixed axes of the span relative to main beams or trusses of the span symmetrically and equidistantly from the longitudinal axis of the span, and a fixed support part is installed along the longitudinal axis of the span on the fixed axis of resting. The support part linearly moving in longitudinal direction is installed linearly on the mobile axis of resting. Support parts moving in all directions may perceive only vertical loads from the span. Linearly moving support parts may perceive only horizontal transverse loads without possibility to perceive vertical reactions. The fixed support part may perceive only horizontal longitudinal and transverse loads without possibility to perceive vertical reactions.EFFECT: increased reliability.4 cl, 3 dwg

ethod to install stiffening girder of cable-braced bridge // 2514331
FIELD: construction.SUBSTANCE: method to install a stiffening girder of a cable-braced bridge consists in pre-assembly for a full section of a space block of the stiffening girder on building slips and its delivery to the place of installation, slinging of the block to a weight-lifting device, movement of the block to the design position, its fixation on the previously assembled part of the stiffening girder and attachment of cable braces to the assembled blocks and their tightening. The space block of the stiffening girder after pre-assembly on the building slips is moved to the assembled part of the stiffening girder, it is aligned along the axis of the bridge and loaded onto rolling trolleys. The rolling trolleys with the space block of the stiffening girder located along the axis of the bridge are moved to the place of the assembly, locked via the weight-lifting device, and the rolling trolleys are turned outside the zone of attachment of the previously tightened cable braces by 90° together with the space block of the stiffening girder. Then they sling the space block of the stiffening girder to the weight-lifting device and move it to the zone of installation. After fixation of the space block the stiffening girder, the cable braces are fixed to the assembled part of the stiffening girder to the earlier mounted space block of the stiffening girder with their subsequent tightening, afterwards the installation process is repeated.EFFECT: improved reliability.2 dwg

Device for longitudinal launching of bridge spans // 2514312
FIELD: construction.SUBSTANCE: device for longitudinal launching of bridge spans comprises a roller track with side stops, a pushing device and a rolling device, comprising roller carriages with support sheets, rubber gaskets and a transition beam interacting with the lower belt of the launched span. The transition beam along the axis of the bridge is equipped with symmetrically arranged support cantilevers, to which power jacks are fixed with the help of spring suspensions, and in the direction transverse to the axis of the bridge, the transition beam has stops at two sides with inbuilt adjustment accessories, which interact with support sheets of the roller carriages. Adjustment accessories are made in the form of a screw-nut system, the screw in which interacts with support sheets of roller carriages. Support sheets are equipped with guide slots, in which the roller carriages are fixed. Power jacks are made as hydraulic with a drive from a manual pump station.EFFECT: improved reliability.4 cl, 3 dwg

Construction method and design of overpasses and bridges under conditions of permafrost // 2513574
FIELD: construction.SUBSTANCE: invention relates to road construction of overpasses and bridges for motor and railway roads under conditions of permafrost, seismic active regions, and also in mountain and uneven terrain, on swamps and weak soils. The method includes erection of guncrete supports and installation of a solid reinforced concrete span on them from box-shaped blocks tightened and stressed with steel ropes to a lengthy structure - a beam. Guncrete supports are installed in the permafrost layer for the depth of at least 1 m from the surface of the stable layer of permafrost with isolation of upper and lower parts of the supports with elastic tight reservoirs filled with air compressed to pressure of at least 2 atm. Blocks of the span are tightened and stressed with steel ropes in pairs and symmetrically to each other by above-support blocks, and the entire span is installed with a clearance-airway between the lower surface of the beam and the surface of soil of at least 1 m. Elastic tight reservoirs of compressed air are arranged in the upper part in the form of car tyres, and in the lower part - in the form of a cylindrical reservoir with a groove for insertion of the lower ends of supports and are connected with a compressor by steel tubes embedded into the concrete of the guncrete support. Above-support blocks of the span are equipped with a vertical wall arranged in the middle part of the block across the cloth with anchor seats for fixation of anchors arranged symmetrically at both sides of the wall. Tightening and stressed steel ropes are arranged in pairs in holes of ledges-crossbars of symmetrical span blocks, excluding the middle one.EFFECT: invention makes it possible to speed up construction, to reduce operating costs and to increase safety of traffic.2 cl, 5 dwg

Bridge reinforced concrete beam // 2507336
FIELD: construction.SUBSTANCE: layer of a hydraulic protection, with thickness of at least 80 mm, is arranged from an aggressive-resistant polyester polymer concrete NPS-609-21M, in the upper layer of the shelf and is reinforced with prestressed glass plastic reinforcement, being at the same time a bearing layer, which is put into operation under action of loads jointly with the upper shelf of the beam and the rib.EFFECT: improved operating reliability.3 dwg

ethod to dismantle t-shaped frame of bridge span and top-trolley beam for realisation of this method // 2506367
FIELD: construction, road engineering.SUBSTANCE: method for dismantling of a T-shaped frame in a bridge span formed by box-shaped blocks assembled as hanging over and attached to the support head with bundles of prestressed reinforcement, consists in pre-dismantling of the bridge deck, alternate mounting to the crane and cutting of box-shaped blocks of consoles of the T-shaped frame and their removal from the building site. On consoles of the T-shaped frame they mount standalone mounting rails with crossbars, they anchor one end of the standalone installation of beams on spans and rest it by supports on the top plate of the span. After that they attach end box-shaped blocks of consoles to cross beams, and cut them along the axis of joining with the adjacent box-shaped blocks, and then one of the cut blocks is slung to the crane and removed from the construction site. The vacated standalone mounting beam is moved to the new parking lot, the next box-shaped block is attached to its cross beam, the second cut block is slung to the crane and removed from the construction site, and then the vacated standalone mounting beam is moved to the new parking lot, and the next box-shaped block is attached to the cross beam. The process of dismantling the span continues in a similar manner until it reaches the ends of the standalone mounting axis of the support beams, and then the ends of the standalone mounting beams are combined together to form a single mounting rail, and it is anchored to the support, then the process of dismantling of the span continues the same way. Prior to attachment of the box-shaped blocks to cross beams and cutting of segments of span blocks they strengthen the joints of the span blocks by drilling holes in these joints, introduction of adhesive into their cavities and plugging these holes with metal dowels. The mounting beam for carrying out the method includes a mobile scaffold, a cross beam with rods, an anchor attached to the span and supports. The mounting beam made as composite of two standalone mounting beams, each provided with scaffolds, a crossbeam with rods, an anchor attached to the span and supports, besides, self-mounting rails are combined into a single mounting beam during dismantling of the span when the free ends of the standalone mounting beam reach the axis of the bridge supports. Anchors in the single mounting beam are fixed on the bridge support.EFFECT: improved design.4 cl, 6 dwg

ethod to close span and levelling device for realisation of this method // 2498005
FIELD: construction.SUBSTANCE: first in building slips they perform check assembly of end and closing panels, cutting of edges in end and closing panels and their mutual fitting for welding, temporary fixing elements and levelling devices are attached to cantilever and closing panels. End panels are joined to cantilevers of span stiffening girder cantilevers, their position is adjusted along line and grade, a mounting gap is created between them. The support part is wedged, and a closing panel is installed into the span, cantilever sections of the span are moved, the mutual position of joined panels is calibrated with the help of a levelling device, and they are joined temporarily. Then support parts are wedged out, and joints are arranged between end panels and the closing panel with the help of permanent connecting elements and electric welding, afterwards temporary fixing elements and the guide device are removed. The levelling device comprises fixing beams and coaxial stops with receiving holes.EFFECT: method improvement.3 cl, 8 dwg

Launch to transport span blocks // 2498004
FIELD: construction.SUBSTANCE: launch to transport span blocks includes rigging that carries a span block and is made in the form of support beams attached to the launch deck and distributing beams with side stops resting against them. Rigging is equipped with a pushing device, rolling trolleys, onto support frames of which the span block is rested as it is brought on the launch, riding beams that rest against distributing beams by means of ball support parts and made of longitudinal beams with rolling paths and thrust beams and transverse beams attached to the lower plane of the span blocks during its transportation to the site of installation. Thrust frames are attached to the span block in process of transportation and are equipped with cross links and runs in the longitudinal direction.EFFECT: device makes it possible to reduce costs for movement of superheavy blocks, having preserved reliability of appropriate conditions of work at sea.3 cl, 4 dwg

ethod to disassemble bridge span and device for realisation of this method // 2495184
FIELD: construction.SUBSTANCE: method to disassemble a bridge span formed from blocks of T-shaped frames with closing elements assembled as suspended, consists in preliminary dismantling of a deck, alternate fixation of blocks to a weight-lifting device and cutting of blocks on cantilevers of the T-shaped frame and their lowering and removal from the construction site. Previously pier blocks of T-shaped frames are rigidly fixed to templates, a launching rail is installed on the upper slab of the span, and a device for disassembly of the span is mounted along the bridge axis, which comprises a bearing beam with a launching nose, flexible suspensions and jacks with a flexible stem. Then the device for disassembly of the span is moved along launching rails, covering spans of at least two adjacent T-shaped frames, afterwards blocks of one of T-shaped frames and a closing element are fixed with the help of flexible suspensions to the bearing beam, and the closing element is fixed to flexible stems of jacks, cut and lowered with the help of jacks. Extreme blocks of cantilevers of the T-shaped frame are fixed to flexible stems of the jack, and these blocks are cut and lowered with the help of jacks, and then jacks are moved to a new position, and their flexible stems are fixed to extreme blocks of cantilevers of the T-shaped frame. Afterwards the process of disassembly of the T-shaped frame is continued in a similar manner, at the same time after disassembly of blocks of the first T-shaped frame in process of disassembly the bearing frame of the device is moved to the following span, and similarly the next T-shaped frame is disassembled.EFFECT: increased operational reliability.4 cl, 10 dwg

ethod for lifting of reinforced concrete beam of bridgework during repair of support crossbar or replacement of support parts // 2495183
FIELD: construction.SUBSTANCE: method for lifting of a middle reinforced concrete beam of a bridgework span during repair of a support crossbar or replacement of support parts includes installation of vertical link rods, thrust and support cross beams, installation of a lifting device, lifting of a span beam with the help of the lifting device, subsequent repair of the support crossbar or replacement of support parts, lowering of the span and disassembly of cross beams and auxiliary devices. The novelty in the proposed method is the fact that the large thrust beam is installed across the bridgework at the height h, small support cross beams are mounted under the lifted middle beam and two adjacent beams, at the same time the lifting device is at least one jack installed on the large thrust cross beam, interacting with the small additional cross beam. To lift the extreme reinforced concrete beam, the large thrust cross beam is installed across the bridgework to the height h, small support cross beams are mounted under the lifted extreme beam, and under one of additional middle beams, at the same time the lifting device is at least one jack installed on the beam, which is adjacent relative to the lifted one, and interacting with the large thrust cross beam.EFFECT: simplified method to lift bridgework beams with reduction of labour expenses, reduction of time for performance of repair works and creation of favourable conditions for performance of repair works.3 cl, 2 dwg

ethod for erection of bridge on water area // 2483153
FIELD: construction.SUBSTANCE: method for erection of a bridge on a water area includes submersion of permanent support piles (PSP) of the bridge into the water area bottom with pile driving equipment using temporary supports (TS), installation of spans and erection of a traffic way bed. At the initial stage of works from the bridge abutment the TSs are submerged with arrangement of temporary support beams on them, onto which a process complex (PC) is installed with the possibility of its displacement along these support beams to leader TSs, by means of which, in process of movement in design direction of works, next TSs and PSPs of the next intermediate bridge support are mounted in series. The mobile PC is equipped with equipment and assembly elements for installation of metal TSs and PSPs, a heavy-load lifting crane and a pile dipper, equipped with conductors placed on the TC for arrangement of TS and PSP piles at design position by means of a lifting crane with their further submersion in bottom soil with the pile dipper at the required depth. At the following stages of works the PC is moved along newly laid temporary support beams, serially another leader TSs are arranged to the design section of PSP installation, and intermediate bridge supports are installed. In the design area of intermediate bridge support installation with PSPs submerged into soil between two adjacent rows of TSs a box is mounted of interlocking panels, by means of a welded joint grown to the design elevation of the bridge TSs, a temporary transverse crossbar is fixed on them, and by the method of longitudinal launching a section of the bridge metal section is installed on it. From the box formed by interlocking panels water is pumped, and soil is withdrawn, and in the box the foundation and the stepped body of bridge support are erected in series by means of reinforcement and concreting to the specified height above the bridge span. Construction materials for erection of the foundation and bridge support body are delivered to the section of reinforcement and concreting along the upper span by means of motor transport, a concrete truck and autoconcrete pumps, and at the final stage of works the upper span is finally installed into the design position, lowering by means of hydraulic jacks onto the support parts of the erected body of the support, the TSs are dismantled, and the traffic way bed is arranged on the span.EFFECT: improved manufacturability and operational reliability of construction, reduction of its duration and reduced labour intensiveness.7 cl, 3 dwg

ethod to eliminate deformations of bridge crossing abutments // 2481433
FIELD: construction.SUBSTANCE: method to eliminate deformations of bridge crossing abutments includes increasing the support area of abutments by erection of a solid shell around them. Previously along the contour of the support part of shells there are waterproof screens erected by means of injection of a water-impermeable composition into soils of abutment bases, monolithic reinforced concrete shells are erected at three sides of each abutment from the level of its foot, shells are connected with each other by a spacer beam. In support parts of the shells, every of which has width exceeding the width of the appropriate abutment, there are through holes made, through which fixing solutions are injected into the soil base of abutments.EFFECT: increased efficiency and reliability of elimination of deformations of bridge crossing abutments erected on a soil base with insufficient bearing capacity.3 dwg

Device to lift and install span blocks // 2479687
FIELD: construction.SUBSTANCE: device comprises a spatial bearing structure with an anchor, front and rear cross beams resting by means of carriages against a rail track, a mechanism to lift span blocks, a mechanism of longitudinal displacement of the device and the rail track, a mechanism of transverse and longitudinal displacement of an installed span block, comprising a lower frame movably resting against the spatial bearing structure, and an upper frame movably resting against the lower frame, and having a mechanism to lift span blocks built into it, and a power drive of these mechanisms. The spatial bearing structure is made in the form of a frame of trapezoidal shape, comprising two triangular trusses combined between each other with a vertical support stand and having upper and lower parallel horizontal longitudinal belts. The lower longitudinal belts rest against front and rear transverse beams and are equipped with guides with eye freely moving along them. The rail track is made in the form of two pairwise end elements resting against rail beams, front ones of which are equipped with vertical support stands. Rail beams are combined to each other with flexible longitudinal traction rods and have spring-loaded wheels and support pads arranged in the lower plane. The mechanism of longitudinal displacement of the device and rail tracks is made in the form of power cylinders, stems of which are hingedly combined with the front transverse beam, and bodies of power cylinders are rigidly fixed on the vertical support stands of rail beams and are hingedly connected with their free ends with eyes. On the front and rear cross beams there are mechanisms of vertical device lifting installed, arranged in the form of power cylinders with stop accessories. The mechanism to lift span blocks comprises drum winches arranged at lower longitudinal belts as synchronised to each other, and their ropes are pulled via bypass blocks installed at upper longitudinal belts and are connected with a polyspast system comprising lower shells of blocks, upper shells of blocks and balancing blocks. Upper shells of blocks are built into the upper frames of the mechanism of longitudinal and transverse displacement of the installed block.EFFECT: improvement of device operational reliability.4 cl, 8 dwg

Reinforcing structure of pier table of arched bridge span // 2476637
FIELD: construction.SUBSTANCE: reinforcing structure of a pier table of an arched bridge span includes arches that rest with their ends against permanent bridge supports, support stands, a beam grid, made of longitudinal and transverse beams and longitudinal beams of filling between spans, resting on longitudinal beams,- and a traffic area with movement joints. Under the transverse beam, which is extreme in the span and adjoins the pier table, there is a flat reinforcement truss mounted, attached to support stands, between the extreme transverse beam in the span that adjoins the pier table and the flat reinforcement truss there are additional longitudinal beams that rest on the flat reinforcement truss and are brought to the transverse beam arranged in the middle part of the span. On additional longitudinal beams there are additional transverse reinforcement beams installed, against which ends of longitudinal beams of filling between spans via tangential support parts of higher movements rest, and via wedged packages of steel sheets - ends of existing longitudinal beams adjoining the pier table of the span. The flat reinforcement truss has bearing capacity that is not lower than the bearing capacity of the transverse beam, which is extreme in the span and adjoins the pier table.EFFECT: higher bearing capacity of an arched bridge span.2 cl, 6 dwg

Device to lower bridge span onto permanent support parts // 2475587
FIELD: construction.SUBSTANCE: device to lower a bridge span onto permanent support parts includes support elements from a thermoplastic material and heating elements. Support elements from a thermoplastic material are arranged in the form of bushings, inside of every of which there are heating elements. The heating element is arranged coaxially to the longitudinal axis of the bushing at the equal distance from the outer and inner surfaces of the bushing. Around each of support elements there is a heat protective jacket made of an easily deformable material.EFFECT: higher reliability and accuracy of speed mode of span lowering.2 cl, 4 dwg

Curb to form cable unit in reinforced concrete span // 2468144
FIELD: construction.SUBSTANCE: curb element comprises a cylinder coaxial to a guy of a cable bridge and equipped with a support sheet in the upper part, supported with stiffening ribs. In the end part of the curb element there is a mould for moulding of a cable bridge boss, arranged as split with flange joints in points of splitting and comprising a support ring, to which the lower end of the cylinder is fixed, at the same time the power frame comprises a stand, onto which the support sheet of the cylinder rests, and a horizontal base equipped with a spatial frame supporting the split mould.EFFECT: stand of a power frame may be arranged as telescopic and equipped with a mechanism to vary its length and a fixator of its position.2 cl, 5 dwg

Device to move scaffolding along mounted span cable-stayed girders // 2460839
FIELD: construction.SUBSTANCE: device comprises rolling tracks, fixed on the upper plane of span cable-stayed girders and having holes made with an even pitch, a trolley moving along rolling racks, where the scaffolding rests, a bracket fixed on the trolley, a stop fixed with the help of a split joint in openings of rolling tracks, and a hoist, the rope of which is fixed by one end to the bracket, and with the other one - to the stop. The novelty is the fact that it is equipped with an additional similar stop and a hoist, the bracket is arranged as a horizontal beam that rests in a movable manner by means of a roller support against rolling tracks and having horizontal holes arranged along the entire length with the even pitch. Stops have horizontal holes in the upper part, which are coaxial with the holes in the horizontal beam and where a detachable support bolt is installed. Free ends of hoist ropes are combined with each other by means of a coupling resting as capable of sliding against a horizontal beam.EFFECT: improvement of device.3 dwg

ethod to erect base pier section of cable truss bridge span cable-stayed girder and pilot beam to realise this method // 2460838
FIELD: construction.SUBSTANCE: method to erect a base pier section of a cable truss bridge span cable-stayed girder consists in erection of a temporary pier structure in the lower part of a pylon, assembly of span cable-stayed girder blocks on it and installation of assembly units on the pier section. Previously at the distance from the pylon a temporary bridge support is erected, a lower link is erected on the pylon, then scaffolding is fixed on the temporary support and the pylon, and a temporary pier structure is erected on them in the form of a pilot beam. By means of sliding supports it is rested with one end to a cap of the temporary support, and with the other one - onto the pylon link. Rolling tracks, support and anchor beams with an assembly device and a counterbalance are mounted on the pilot beam. Afterwards the first block of the span cable-stayed girder is lifted with the help of the assembly device and joined to the end of the pilot beam. A length comprising a span cable-stayed girder block and a pilot beam together with an assembly crane and a counterbalance is moved towards a pylon for a distance equal to the length of the mounted cable-stayed girder block. Then the assembly device is moved to a new site as resting onto the assembled cable-stayed girder block, and after assembly of the following block of the cable-stayed girder and movement of the entire length to a new site towards the pylon, the counterbalance is moved towards the pylon, and the end transverse volume block of the pilot beam is dismantled. Afterwards the process of cable-stayed girder blocks assembly is repeated. Prior to longitudinal launching of the length with two last transverse volume blocks of the pilot beam the counterbalance is dismantled, and after assembly of all blocks of the cable-stayed girder of the base pier section its ends are suspended to the pylon cap with the help of guy cables and tightened. The version is proposed to provide a pilot beam to implement the proposed method.EFFECT: increased operational reliability.5 cl, 11 dwg

Rolling scaffold // 2455420
FIELD: construction.SUBSTANCE: rolling scaffold includes a middle and side movable parts, onto which a span formwork rests, besides, the middle and side movable parts comprise a support structure, mechanisms of its displacement and rolling tracks. The novelty is the fact that support structures are made in the form of longitudinal beams equipped with transverse and longitudinal links and struts and having holes arranged with identical pitch in lower belts. Rolling tracks made in the form of sliding supports are arranged in caps of permanent and temporary bridge supports. Displacement mechanisms are arranged in the form of power cylinders, the body of which is fixed on permanent supports of the bridge, and stems are equipped with grips having guide cheeks, covering the lower belt of longitudinal beams with the possibility of free sliding along it and having a hole similar to lower belt holes in the horizontal plane. When matching one of lower belt holes with a grip hole, a detachable prop is installed into them. A process shelter may be rigidly fixed on side movable parts.EFFECT: increased operational reliability.4 dwg

Device to lower bridge spans // 2452809
FIELD: construction.SUBSTANCE: device to lower bridge spans comprises a cylindrical vessel filled with loose material and having holes in side walls for discharge of loose material, and a piston resting with its lower end against the loose material and interacting with its upper end with the lowered span. The novelty is the fact that the cylindrical vessel is equipped with yokes tightly adjacent to it with the capability of circular sliding, where there are holes that match shape and location of holes in side walls of the cylindrical vessel, besides, the loose material is represented by metal balls. Holes arranged in side surfaces of the cylindrical vessel and yokes may have an oval shape along the horizontal line. Besides, the radius R1 of one of the oval ends exceeds the radius of a metal ball by the value from 1 to 2 mm, and the radius R2 in the other end of the oval exceeds the radius of the metal ball by the value from 4 to 5 mm. Metal balls have Rockwell hardness HRC from 62 to 66 units and are made of steel according to GOST 801-78 "Bearing steel. Technical specification".EFFECT: increased operational reliability.3 cl, 4 dwg

ethod of telescopic longitudinal sliding of bridge superstructure // 2450100
FIELD: construction.SUBSTANCE: method of longitudinal sliding of bridge superstructure includes three stages. At first stage superstructure at one of banks is assembled as continuous structure and installed at bogies. At that inner beam is divided into two parts. The first part of inner beam is used as sliding girder. The second part is used as rear counterbalance and is loaded with ballast. The first part of inner beam is assembled along direction of outer beam sliding while the other part is assembled behind outer behind both parts of inner beam are driven into outer beam to a certain length and fixed by respective fasteners. At second stage superstructure is transported by means of pushers to the installation site and slided. At third stage outer beam is anchored; ballast and fasteners are removed; parts of inner beam are slided into outer one and then superstructure is installed downwards by means of jacks into final position.EFFECT: improvement of economic factors and reduction of labor efforts due to rejection of rear counterbalance at bridge superstructure sliding.1 cl, 3 dwg

ethod to erect pile bridge footings on water area // 2447226
FIELD: construction.SUBSTANCE: development of a technology for erection of pile bridge footings of long span bridge structures of significant length on a water area during realisation of a pioneer method of construction with application of temporary supports and conductors of special design for submersion of the main (capital) piled supports.EFFECT: reduction of construction time and lower labour intensiveness of works with simplification of the process of erection of pile bridge footings, increased reliability of assembly and continuity of operation regardless of weather conditions and roughness on a water area.9 cl, 1 dwg

ethod to assemble inventory low-water bridge on screw piles by span launching // 2446246
FIELD: construction.SUBSTANCE: assembly site is equipped on an entry bank for incremental assembly of a span from rolled metal products on roller assembly trolleys, than the bridge inventory property is stocked nearby, and elements of serial screw supports are stocked near water edge. A 40-ton ferry from a set of a pontoon-bridge park (PBP) is dropped on water, and a special purpose vehicle KrA3-255B (KrA3-260) is installed on the ferry from the PBP set, equipped with a fixator cartridge of screw piles, with elements of serial helical supports laid onto the ferry with an autocrane, and it is installed into the bridge range at the value equal to the rated span of the bridge from the coastal support trolley, a screw pile is inserted into a fixator cartridge with a regular weight-lifting boom of the special purpose vehicle, a detachable capstan is put on and fixed on it. A rope of a regular hoist is entered into the capstan, and a pile is screwed into soil by means of rope unreeling from the capstan, after the pile has been submerged to the design elevation, the ferry is moved on anchors across the bridge axis, and the operation is repeated with the second pile. Then the ferry is driven into the bridge axis, the weight-lifting boom of the vehicle is used to mount a crossbar and a support trolley of a serial screw support, the ferry with the pile-driving equipment is slung with a span assembled on the assembly site as a continuous system with the help of joint pads, and a boat is used to launch the bridge over one span, afterwards the ferry with the pile-driving equipment is moved into the second span, and the operation of assembly of a serial screw support and launching is repeated, the bridge is moved into the last span from the opposite bank, using the special purpose vehicle removed from the ferry, afterwards the traffic area and the breast rail are assembled manually, and exits from the bridge are arranged.EFFECT: reduced labour inputs, higher efficiency of low-water bridges construction under wartime conditions, disasters and emergencies.1 cl, 8 dwg

Bridge manufacturing method (versions) and bridge // 2436890
FIELD: construction.SUBSTANCE: one bridge support, two bridge beams (2) and two support bars (3) are manufactured almost in vertical position. Support bars (3) are connected to top of the support and to bridge beams (2). By lifting the end points (9) of bridge beams (2), which are located near the support, bridge beams (2) are put to final horizontal position. Then, end points (9) of bridge beams (2) are connected to the support.EFFECT: reducing moment loads in bridge beam.20 cl, 32 dwg

Superstructure from box-type plank-stacked-towel-nail blocks // 2436889
FIELD: construction.SUBSTANCE: superstructure consists of box-type plank-stacked-towel-nail blocks combined with transverse stacked timber slab laid immediately on the insulated surface of blocks and fixed by means of bolts to belt bars; at that, stacked timber slab is covered with adhesive waterproofing compound on which there laid is canting and deck consisting of reinforced concrete plates; waste water disposal from the roadway is provided with transverse inclination and longitudinal chutes. Upper and lower flanges of box-type block include bars attached by means of steel plates and attached to walls by means of towel-bolt connections, and two layers of crossed boards attached to the bars by means of nails; at that, boards of the first layer are laid perpendicular to the block axis, and boards of the second layers are laid along the block axis.EFFECT: increasing load capacity of plank-nail superstructures, reducing material consumption and labour intensity of their manufacture and erection, increasing service life of bridges with plank-nail superstructures.1 cl, 3 dwg
 
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