Device for closing compensation gap
FIELD: machine engineering.
SUBSTANCE: invention relates to a device (1) for closing the compensation gap and made in the form of a plate-shaped adapter element (2) closing the compensation gap (4) existing between the structure of two elements (3) for passing a travelling object. The compensation gap (4) is closed by at least two transverse beams (5) supported by both said elements (3) of the structure, in this case at least one stand of the bearing stands (6) is configured for providing shift movement of the transverse beam (5) with respect to the corresponding element (3) of the structure. The transverse beams (5) support a group of plates (11) located above the beams and oriented at least substantially parallel to each other, at that the plates are movable relative to the transverse beams (5), and movable relative to each other. A device (17) for protection against overload is arranged between the two plates (11), which are movable relative to the transverse beams (5) and movable relative to each other, and comprises two spaced support beams resting on transverse beams, and a filling profile closing the gap between supporting beams. At least one fixing device is arranged between two supporting beams for fixing the relative position of the supporting beams relative to each other. When the threshold value exceeds the load acting on the two supporting beams for their convergence, the fixing device eliminates said fixing of position.
EFFECT: providing movement of both support beams towards each other with displacement of the filling profile up outside the gap.
21 cl, 8 dwg
SUBSTANCE: between a ballast layer of crushed stone and an insulating material there is a layer of geotextile material and a layer of foam plastic. Foam plastic is "Penoplex", type 45. An elasto-yielding gasket is arranged between the layer of the insulating material and the foam plastic layer. A multi-layer shock-absorbing noise-attenuating mat is placed between the layer of the insulating material and the foam plastic layer, and the mat comprises the elasto-yielding gasket and layers of geotextile material that cover it from the top and at the bottom. The ballast layer of crushed stone for the entire thickness is impregnated with a polymer compound, which creases an elastic crushed stone and polymer system along the entire bridge length. The method to erect the track superstructure on bridges with trip on ballast consists in assembly of a ballast tank, application of a layer of an insulating material on it and laying of a ballast later from crushed stone and sleepers with a rail track. The novelty is the fact that after application of the insulating material layer onto the ballast tank it is coated with the foam plastic layer and the geotextile material layer with further laying of ballast layer of crushed stone on it and sleepers with a rail track. Previously the elasto-yielding gasket is laid onto the layer of the insulating material with further laying of the foam plastic layer on it. Previously on the layer of the insulating material they lay a multi-layer shock-absorbing noise-attenuating mat comprising the elasto-yielding gasket and layers of geotextile material covering it from the top and at the bottom, with further laying of the foam plastic layer on it. After laying of the ballast layer from crushed stone, a polymer compound is introduced in it for the entire thickness, which creates an elastic crushed stone and polymer system at the entire length of the bridge. Previously, before laying of a ballast layer, the crushed stone is coated with a wear resistant waterproof compound.
EFFECT: improvement of a device.
10 cl, 2 dwg
SUBSTANCE: device comprises a pile cluster deepened into soil and a head that combines them on top. On the upper surface of the head arranged under water there is a through cylinder fixed, through which a tubular traction element stretches being rigidly fixed with the bridge span with a perforated piston coaxially fixed on it.
EFFECT: efficient damping of arising vibrations of a bridge span.
SUBSTANCE: resonant oscillations of span beams interfering with traffic may be eliminated by variation of mass, stiffness of the structure, reducing force of wind effects with the help of various cutoff plates or fairings, but better by variation of the length of support of two adjacent beams joined to between each other by links, since periods of internal oscillations of beams to larger extent depend on the length of support, compared to other values, and mismatch of periods of internal oscillations will not allow growth of resonant oscillations of the span above permissible limits. However, the permanent load from weight of the span may be left also on permanent support parts according to the project, and for temporary wind load, to reduce length of support of one beam with the help of additional temporary support part with a shock absorber, to avoid too high forces at the support. The pressing force is achieved by wedging or jacking to the required value.
EFFECT: increased operational reliability.
1 cl, 1 dwg
SUBSTANCE: bearing board with a longitudinal groove has a stop on the level of the middle of a superstructure slab installed above, and the longitudinal groove of the bearing board in this area is interrupted with a stop in the area with length from 60 to 100 cm, and the superstructure slab has a longitudinal rib, in the middle of which in the section with length from 65 to 105 cm there is a groove, where the bearing board stop enters with a kinematical closure.
EFFECT: development of a structure requiring simpler longitudinal reinforcement and lower costs for formwork and manufacturing, possibility to manufacture superstructure slabs of larger length.
10 cl, 3 dwg
SUBSTANCE: method to remove resonance of girder spans consists in the fact that in each pair of identical girders joined to each other, a different period of internal oscillations is created for each girder by variation of support span length due to longitudinal displacement of support parts to the opposite sides along a bridge.
EFFECT: removal of resonance.
SUBSTANCE: invention may be used in unit of lattice truss, including belt of boxy section with welded vertical and horizontal sheets, gusset plates with sides of curvilinear contour with radius R, belts, braces and joint pads fixed to horizontal sheet. In crossed horizontal sheet in zone of arrangement of gusset plates, arranged as a whole with vertical sheets, there are through slots coaxial to vertical sheets with technological allowances at end sections, width of through slots exceeds thickness of vertical gusset plates by value of welding gap. External parts of gusset plates sides curvilinear by radius R in zone of coupling with end sections of slots have smooth transition to straight sections of vertical sheets of belt, arranged below level of crossed horizontal sheet. End sections of slot in zone of transition of external parts of gusset plates sides curvilinear by radius R to straight sections of vertical sheets of belt arranged below level of internal surface of crossed horizontal sheet, and in zone of technological allowances are filled with metal melt to level of external edge of crossed horizontal sheet. Smooth transition in gusset plates may be arranged with inclination of 1:4. Width of slot is by 2 mm more than thickness of wall of gusset plate with allowance of +2;-1 mm. Method for manufacturing of lattice truss unit consists in assembly and welding of horizontal and vertical sheets of lower belt and further welding to horizontal sheet of gusset plates. Previously vertical walls and gusset plates are arranged as a whole, in horizontal sheet crossed by gusset plates, in areas of arrangement of gusset plates there are through slots with technological allowances at end sections. After assembly and welding of horizontal sheet without slots with vertical sheets, horizontal sheet with slots is lowered, down to design elevation, inserting gusset plates through slots, and ends of smooth transition of gusset plates on straight sections of vertical sheets of belt and straight sections of these vertical sheets are arranged below level of internal surface of crossed horizontal sheet, afterwards in zone of slots arrangement gusset plates are welded to horizontal sheet, besides, end sections of slots in zone of transition of external parts of gusset plates sides curvilinear by radius R to straight sections of vertical sheets of belt, and in zone of technological allowances are filled with metal melt to level of external edge of crossed horizontal sheet by means of multiple electric welding in these zones.
EFFECT: method cost reduction and improved operation reliability.
SUBSTANCE: method for erection of bridge support pillar on permafrost includes operations of well drilling with diametre smaller than diametre of pillar, heating of well and pillar submersion. The novelty in the proposed invention is the fact that it includes operation of heating drilled well and operation of pillar heating, besides prior to submersion, pillar bottom is matched with well top, so that axes of well and pillar coincide and fixed in such position, afterwards simultaneously pillar heating operation and drilled well heating operation are carried out, and further pillar is submerged into well. Heating of hollow (tubular) pillar is done within its cavity, besides bottom of pillar cavity is matched with top of well cavity. Besides operations of pillar heating and well heating are partially matched with operation of pillar submersion. Time of well heating is identified through the following formula: hour, where δ - thickness of soil layer on the side of well cavity, equal to difference of pillar and well radiuses, m; Q - hidden heats for changeover of soil from one phased condition into another one, ccal/m3; t - air temperature in well cavity in process of its heating, degrees. Besides it contains operation of soil cooling, which is carried out after pillar submersion.
EFFECT: invention provides for the possibility to submerge pillars of higher diametre (1-3 m and more) and larger depth (up to 30m and more).
4 cl, 4 dwg
FIELD: construction, road engineering.
SUBSTANCE: invention is related to bridge engineering and may be used in design and construction of bridge pillars on foundations of any design. In prefabricated bridge pillar made of blocks that consist of steel-concrete stands joined to each other, which include inner and outer metal pipes, space between which is filled with compacted inert material, preferably concrete, and ends are closed with flanges, besides inner metal pipes and holes in flange joints of stands are arranged with diametre that provides for motion of a person and required mechanisms inside the pipe; stands are combined in block by means of bolt joints via metal connections, blocks are combined to each other in process of pillar installation by flange connections of stands at high-strength bolts. At the same time block may consists of at least one steel-concrete stand. Pillar may be fixed by flange connections of lower block stands to foundation with the help of embedded part or anchor bolts, and also directly to bedrock base via anchors installed in bedrock base.
EFFECT: development of prefabricated bridge pillar having, under conditions of existing dynamic loads, in particular seismic ones, high reliability and durability with provision of its material intensity and labour costs reduction in process of pillar erection and operation.
1 cl, 9 dwg
FIELD: construction industry.
SUBSTANCE: metal railroad superstructure includes main trusses with triangular grid having upper and lower flanges, driveway made in the form of single-layered orthotropic plate located in level of lower flanges and consisting of covering plate supported with longitudinal ribs and transverse beams, and rail track on ballast, which rests on orthotropic plate. New feature is that transverse beams of orthotropic plate are attached to lower flanges outside the truss joint area, orthotropic plate consists as to width in each panel of three units connected to each other with longitudinal and transverse butt joints; at that, lower flange in axes of joints is provided from inside with support tables, and covering plate attached as to length of panels to upper plate of lower flanges has chamfers in joints location area and is attached to support tables. Covering plate has in its cross section the double-slope profile with decrease towards flanges of superstructure. Metal rail road superstructure is equipped with water drain devices arranged at attachment points of covering plate to lower flange of superstructure.
EFFECT: improving operating reliability.
3 cl, 5 dwg
FIELD: bridge construction and building erection, particularly structural or constructional details of bridges.
SUBSTANCE: beam comprises glued timber wall, connected with reinforced concrete panel along upper edge thereof by means of shear-taking members and transversal rod-shaped pegs. The shear-taking members have the first ends anchored in inclined blind grooves of glued organic concrete composition, and the second ends built in reinforced concrete panel. Shear-taking members are made as inclined arch-shaped members with pairs bent end parts inserted in blind inclined grooves of timber wall or as members having closed contours.
EFFECT: increased load-bearing ability, safety factor and reliability.
2 cl, 15 dwg
FIELD: technological processes.
SUBSTANCE: invention relates to a device for strapping of a deformation joint between two parts of a structure. The device includes at least two joint profiles for attachment of an elastic strap sealing a deformation joint at least partially, which can be fixed with an anchor structure on the corresponding part of the structure. Besides, the invention relates to a shaped structure for such a device and to a method for obtaining joint profiles.
EFFECT: joint profiles have a wave shape in a longitudinal direction of an FLR joint, match each other when in a laid state and at least partially hang above the deformation joint.
25 cl, 13 dwg
SUBSTANCE: deformation joint is made of three standard sections 125×125×12, of closed type, closes the gap between spans on motor road bridges and overbridges. Angles are arranged with formation of a transverse tray for removal of water, one of which is a support one, and two other ones are arranged as capable of sliding of angles relative to each other for the possibility of free movement of spans.
EFFECT: tray design eliminates moisture ingress to lower structures of bridge supports.
SUBSTANCE: invention relates to design of expansion joints (EJ) of comb and modular comb types used in bridge engineering. An EJ covered with combed fingers 1, between which there are elastic comb plates 3, having a stepped shape. Lower parts 4 of elastic comb plates 3 are rigidly fixed between a bearing beam 5 and comb fingers 1, with the help of the already installed bolt connection 7. Elastic comb plates 3 are formed into sections, with the help of a flat plate 8, comprising lower parts 4 of elastic comb plates 3.
EFFECT: safe passage of bicycle transport along an expansion joint and protection against penetration of snow, ice, garbage, gravel and crushed stone under an expansion joint, considerable increase of functionality of expansion joints by perception of transverse displacements and turns in plan of spans, and prevention of freezing and damage of comb fingers.
11 cl, 10 dwg
SUBSTANCE: temperature joint of bridge crossing of road bed includes an insert from two-component mastic compound, which is attached to beam webs of bridge crossing, spring element arranged in two-component mastic compound and attached to beams of bridge crossing and made in the form of bent plate, the generatrixes of which are arranged in vertical plane.
EFFECT: increasing service life of bridge crossing at simultaneous possibility of increasing its movement value.
13 cl, 8 dwg
SUBSTANCE: in a covering assembly (1) for a contraction joint (2) located between an abutment (3) and a deck (4) in a passageway structure. The abutment and the deck have cavities (8) adjoining the contraction joint and filled with polymer concrete wherein a restraint section (16) of each metal edge profile (14). Between two edge profiles there is an elastic sealing profile (27) attached thereto for sealing. A toothed profile (21) is attached to the surface of each regional profile (14). It has a surface (22) which ends with surfaces (11, 12) of polymer concrete (10) and road carpet (6) with its teeth interlocking those of another gear profile. The restraint sections (16) of the edge profiles (14) have gaps (25) filled with polymer concrete (10).
EFFECT: possibility to cover the contraction joints of greater effective range.
16 cl, 2 dwg
FIELD: construction, particularly to erect cast-in-place building structures, namely bridge and tunnel roadway pavings and other elongated structures, without control joints.
SUBSTANCE: contraction joint comprises partition extending for the full reinforced concrete member cross-section length and transversal reinforcement. Longitudinal reinforcement is made as continuous bars in member cross-section near the joint. Partition is made as sheet transversal to longitudinal reinforcement direction and provided with anchors connected to one sheet side. Contraction joint also has additional reinforcement anchors fastened in pairs to all continuous bars of longitudinal reinforcement so that each additional anchor is located from each side of the partition and spaced 1a distance from it. The distance 1a is determined from condition of comparability of total continuous reinforcement bar resiliency value determined in above area with resiliency of reinforced concrete member having L length. Cross-sectional area Fr of all continuous reinforcement bars is determined from condition of compatibility of separate longitudinal reinforcement tensile strength and total reinforced concrete member tensile strength, wherein reinforced concrete member cross-sectional area is equal to fb. Summary area Fr of continuous longitudinal reinforcement bars and length la of the area is determined from corresponding relations.
EFFECT: increased reliability and service life of elongated monolithic building structures erected without control joints.
2 cl, 8 dwg
FIELD: construction of bridges and overpasses, particularly span assemblies.
SUBSTANCE: joint structure comprises composite slab ribbed girders with transversal monolithic reinforced concrete joints and connection slab spaced from girder ribs in over-pier areas. The connection slap is supported by girder ribs in support areas of connection slab ends and is spaced from girder slab along span assembly length. Vertical pads, for instance made of steel and rubber, are laid in the created spaces. The slab is connected to girder slab in longitudinal direction by means of horizontal rods arranged in connection slab and girder slab bodies or in transversal monolithic joints of composite slab ribbed girders and made as a single whole therewith along girder lengths. Horizontal rods in vertical spaces have protective resilient coverings. Connection slab length is to be not less that distance between axes of adjacent girder support areas. In the case of connection slab length insufficient for horizontal rod embedding in it adjacent rods located in single plane are connected with each other. In periods characterized by higher ambient temperature vertical pads are located in lower parts of vertical spaces. In periods with low ambient temperature and in the case of insufficient connection slab length vertical pads are arranged for the full length of connection slab.
EFFECT: reduced construction costs, increased reliability of join structure.
4 cl, 5 dwg
FIELD: control joints, particularly packing of metal and plastic or elastic materials for joint forming.
SUBSTANCE: assembly comprises the first profiled member secured to one edge of the first concrete panel and the second profiled member fastened to one edge of the second concrete panel. The profiled members are connected with each other by removable connection strips so that a gap is created between the profiled members. The profiled members and the connection strips define single continuous extruded profile unit formed of aluminum. Connection strip edges are fastened to profiled members by means of ultra-thin bridges, which maintain connection between profiled members during panel casting operation. Control joint assembly is installed at design height on concreting base before panel casting. During panel casting connection strips cover gaps between profiled members and prevent gap filling with concrete. After concrete hardening the connection strips are separated from the panel and the gaps are filled with elastic sealant. The first profiled member is used as mold for control joint forming and is made so that concrete panels may be cast from different control joint sides the at any time.
EFFECT: increased efficiency.
9 cl, 3 dwg
FIELD: building, particularly to built and repair highway bridges and to create control joints thereof.
SUBSTANCE: control joint comprises metal covering sheet fixedly located on rubber support from one side of vertical joint plane and movably laid on Teflon pier from another covering sheet side. The pier is arranged from bridge abutment side. Angle profiles having lower flanges facing each other are anchored in span structure from both sides of vertical joint plane correspondingly. The joint also has at least two cushioning metal net layers inserted between the angle profiles and above covering sheet and connected to vertical flanges of angle profiles by metal net ends. The cushioning metal nets are preferable resilient and/or pre-stressed by supports made as metal bars. The cushioning metal net has openings of not less than 15×15 mm dimensions and the nets are spaced apart a distance equal to not less than half of the net opening dimension. The cushioning metal nets are parallel to metal sheet and located in polymer-bitumen mastic layer laid on the metal sheet.
EFFECT: increased deformation capacity, simplified structure, improved reliability and maintainability.
4 cl, 2 dwg
FIELD: pavement building and repair, particularly expansion joint construction.
SUBSTANCE: method involves filling gap between beams above sealing padding with cold mastic comprising at least two liquid dence oil products, namely products of propane oil residue deasphalting, bitumen, tar, mazut, gas-oil, lube fraction and naphtheno-aromatic hydrocarbons taken in amount of 48.0 - 80.0 % by weight, colloidal solution of acrylic acid ester copolymer with butadiene, styrene, acrylonitrile and/or vinylpyridine copolymer with butadiene and styrene and/or vinyl- and vinylidene chloride copolymer with butadiene and/or polyisoprene and/or butyl rubber and/or poly isobutylene and/or styrene and/or butadiene nitrile and/or polyvinylchloride and/or polyacrylamide and/or ethylenpropylene chlorosulphuretted polyethylene and/or carboxylated polymer and/or urethane polymer taken in amount of 10.0 - 26.0 % by weight, remainder - mineral component; hardening cold mastic; filling upper space between beams with hot mastic. Expansion joint includes sealing padding and cold mastic formed of material including at least two liquid dense oil products, namely products of propane oil residue deasphalting, bitumen, tar, mazut, gas-oil, lube fraction and naphtheno-aromatic hydrocarbons taken in amount of 48.0 - 80.0 % by weight, colloidal solution of acrylic acid ester copolymer with butadiene, styrene, acrylonitrile and/or vinylpyridine copolymer with butadiene and styrene and/or vinyl- and vinylidene chloride copolymer with butadiene and/or polyisoprene and/or butyl rubber and/or poly isobutylene and/or styrene and/or butadiene nitrile and/or polyvinylchloride and/or polyacrylamide and/or ethylenpropylene chlorosulphuretted polyethylene and/or carboxylated polymer and/or urethane polymer taken in amount of 10.0 - 26.0 % by weight remainder - mineral component.
EFFECT: increased service life of bridge passing.
3 cl, 4 dwg
SUBSTANCE: in an asphalt surface at the distance of 5-10 m from each other they mill cavities, coat them with liquid bitumen, and belts are laid into them from elastic-resilient material, representing a polymer composition on the basis of two liquid-viscous low-molecular rubbers with end functional carboxyl and epoxide groups, which are copolymerized and 3D binding agent with three epoxide groups, at the same time deformation joints are formed. Cavities are made with width of 10-30 mm and length equal to width of the asphalt surface, then along the width of the road above deformation joints they roll a roll surface with thickness of 10-15 mm from the same material.
EFFECT: method makes it possible to produce a road surface, which will be successfully operated in winter and summer time without formation of transverse and longitudinal cracks, service life of which may achieve 30 years without repair.