Device to strengthen bearing structures
SUBSTANCE: device for strengthening of bearing structures includes a metal shell installed onto a bearing structure and made of vertical angle elements connected to each other by transverse planks, and a spacer device, comprising jacks rested against lower thrust elements as capable of acting at the metal shell in its longitudinal direction via thrust transverse planks rigidly fixed outside on vertical angle elements. The metal shell is stiffly fixed with thrust elements, besides, the device is made as capable of strengthening of the bearing structures area not limited with building structures serving as thrusts, or having a single-sided such limitation. The device is equipped with anchors, with the help of which the upper part of the metal shell and/or the lower thrust elements are fixed to the bearing structure, thrust transverse planks and lower thrust elements are made from angle bar, reinforced with stiffening ribs under jacks, interacting by their upper part with the thrust transverse planks, and at the same time installed directly under the rib of the thrust transverse planks and between ribs of the lower thrust elements, and transverse planks of the metal shell covering the faces of the bearing structure at the side of installation of jacks and thrust transverse planks, are arranged tightly adjacent to the body of the bearing structure.
EFFECT: expanded area of device usage for reinforcement of bearing structures.
2 cl, 6 dwg
The invention relates to the field of construction and can be used to enhance load-bearing structures columns, brick piers and columns, and also to reinforce the areas of load-bearing structures, not limited to building structures that are used as refractory elements such as slabs, beams, cantilevers columns.
Known anchoring device for anchoring tense spacers amplification used in the amplification of bearing elements of reinforced concrete structures of buildings containing steel ferrule compression attached to strengthen the structural member tie rods, and thrust tables for commercial screws of the spacers, wherein the clip compression is made of composite brackets with hard edges at the end portions equipped with tie rods, and the inner surface of the brackets are treated to increase the static friction forces (Patent RF №2308582 C2, priority date 03.10.2005, publication date 20.10.2007, the author Il'in N. And. EN).
The disadvantages of the known device are: first, the limited scope of utilization, due to appropriate use to enhance load-bearing elements of reinforced concrete structures of buildings and structures after fire, explosion or accident; secondly, the large consumption of materials due to the fact that after the creation of prestressing in design �become of the bracket clip compression with a spacer device.
It is also known a device used in the known method of strengthening columns, containing mounted on the column metal clip vertical angled elements associated transverse slats, compressed in the longitudinal direction of the spacer device and is rigidly connected to based on the column structures, wherein the spacer device is used, the tensioning screw with a nut mounted on and welded to the clip table and when interacting with compression resistant element, is mounted in the upper part of the shroud (USSR Author's certificate No. 607932, priority date 07.02.1977 summer hockey challenge, publication date 25.05.1978, author V. V. Guselnikov, EN).
The disadvantages of the known device are: first, the limited scope of utilization, due to the use of only columns that are in the upper part of the horizontal support surface for anchoring the resistant elements of the cage, and secondly, the large complexity associated with securing and dismantling of the spacer device, as after the creation of pre-stress in the design of the shroud must be removed and welded table spacer device with resistant screws.
As the prototype accepted device for strengthening of load-bearing structures, comprising mounted on the supporting structure of metal clip compressed in the longitudinal direction of the spacer device and is rigidly connected to the thrust element, the spacer device is formed by the national team head plate fixed to the metal holder, and at least two hydraulic jacks installed in the bottom of the device and interacting top with hinged metal clip team head plate made of two symmetrically arranged supporting bars connected by bolts with the possibility of emphasis in the transverse plate holder and bearing on the said jacks mounted under the bars of the bar, wherein the jacks are supported through the switchgear installed on the bottom layer of mortar resistant elements (patent RF №2442867 C1, priority date 16.08.2010, publication date 20.02.2012, the authors of Andrievskii L. V. and others., RU, prototype).
The disadvantage of the prototype is the limited scope of utilization, due to the use of only the plots of load-bearing structures, located between the two constructions, which resistant elements such as slabs, beams, cantilevers columns, bearing capacity which is sufficient for the perception of effort from the existing loads and the spacer device.
The object of the invention is to expand the field of use of the device to enhance the load-bearing structures by applying it also to reinforce the areas not�previous designs, not limited to construction structures used as resistant elements, such as slabs, beams, cantilevers columns.
To solve the problem in the device to enhance the load-bearing structures, including mounted on a supporting structure with metal clip, made of vertical angled elements connected by cross bars, and spacer device comprising jacks, based on lower thrust elements with the possibility of exposure to the metal clip in its longitudinal direction through the thrust of the transverse plate rigidly mounted on the outside vertical corner elements, wherein the metal clip is rigidly secured to the thrust elements according to the invention the device is made with the possibility of increasing the area of load-bearing structures, not limited to construction structures which stops, or having such a one-sided limit, the device is provided with anchors, by means of which the upper part of the metal sleeve and/or bottom resistant the elements are fixed to the supporting structure, the thrust of the transverse plate and the lower thrust elements are made of an angular profile, reinforced with ribs under the jacks, interacting resistant top with cross straps and �that are installed directly under the rib thrust transverse strips between the ribs and the lower thrust element, a transverse plate metal sleeve covering the faces of the supporting structure by the mounting of jacks and thrust the transverse bars, are located immediately adjacent to the body supporting structure.
According to the invention, in the case of unilateral emphasis metal clips in a building structure as a support can be used or slabs, or beams, columns or console with bearing capacity for the perception of effort of the spacer devices and design loads.
Fig.1 schematically shows a device for strengthening of load-bearing structures, General view; Fig.2 - the same, side view; Fig.3 - section a-A in Fig.1; Fig.4 - section B-B in Fig.1; Fig.5 - cross section b-b In Fig.1; Fig.6 - node 1 in Fig.5.
As an example, the device for strengthening of supporting structures, set on a plot of the supporting structure, not limited to construction structures which stops. The device includes a mounted on the supporting structure 1 metal clip 2, made of vertical angular profile elements 3 connected by cross bars 4, and a spacer device to create a pre-stress in a metal housing containing two screw-locks the efforts of the hydraulic Jack 5, mounted on hinged on carried�General design 1 lower thrust elements 6 with the possibility of emphasis in persistent transverse plate 7, rigidly mounted on the outside vertical corners of the 3 metal clips. The upper part of the metal sleeve 2 and the lower thrust element 6 is fixed to the supporting structure 1 by means of bolts 8. Resistant transverse plate 7 and the lower thrust element 6 is made of an angular profile, reinforced with ribs 9 and withstands jacks 5 which is mounted directly under the rib thrust the transverse bars 7 between the ribs and the lower thrust element 6. To increase friction and improve a compression metal sleeve cross strap 4 metal clips covering the faces of the supporting structure by the mounting of the jacks 5 and thrust the transverse bars 7, are located immediately adjacent to the body of the supporting structure and the other of the transverse plate attached to the vertical corners of the metal clips on the outside.
As one of its fastening metal clips or resistant element can be activated building structures, such as slabs, beams, columns or console, the bearing capacity which will be sufficient for the perception of effort of the spacer device at the time of amplification and effort from the design loads after amplification (not shown).
After installing all the metal clips on carrier 2 �the construction of 1 and fixing it with metal clips and a lower thrust element 6 by means of bolts 8 carry out the compression of the metal sleeve 2 is based on the lower thrust element 6 hydraulic jacks 5, connected to one pumping station and providing equal force of thrust. When reaching a settlement efforts in the vertical jacks metal corners 3 of the holder 2 is rigidly connected by welding with the lower thrust element 6, after which the spacer device is removed for re-use, and the metal ferrule 2 is included in the work.
The advantage of the proposed device is to increase the scope of use in the application due to a more rational design of the thrust element.
1. Device for strengthening of supporting structures, including mounted on a supporting structure with metal clip, made of vertical angled elements connected by cross bars, and spacer device comprising jacks, based on lower thrust elements with the possibility of exposure to the metal clip in its longitudinal direction through the thrust of the transverse plate rigidly mounted on the outside vertical corner elements, wherein the metal clip is rigidly secured to the thrust element, characterized in that the device is made with the possibility of increasing the area of load-bearing structures, not limited to construction structures, which stops, or having such a unilateral constraint, the us�master equipped with anchors, with the help of which the upper part of the metal sleeve and/or bottom resistant the elements are fixed to the supporting structure, the thrust of the transverse plate and the lower thrust elements are made of an angular profile, reinforced with ribs under the jacks, interacting resistant top with cross straps and mounted directly under the rib thrust transverse strips between the ribs and the lower thrust element, and the transverse plate metal sleeve covering the faces of the supporting structure by the mounting of jacks and thrust the transverse bars, are located immediately adjacent to the body supporting structure.
2. Device for strengthening of load-bearing structures according to claim 1, characterized in that the one-sided emphasis metal clips in a building structure as a support can be used or slabs, or beams, columns or console with bearing capacity for the perception of effort of the spacer devices and design loads.
SUBSTANCE: reinforcement device for load-carrying structures includes a metal frame installed on the load-carrying structure and made of vertical angled elements connected to each other with transverse planks, and a hold-down device having a possibility of acting on the metal frame in its longitudinal direction. The metal frame is rigidly attached to thrust members; the hold-down device is formed with a supporting structure and at least two hydraulic jacks installed in the lower part of the reinforcement device and interacting with the upper part to the supporting structure installed so that it can be borne against transverse support planks of the metal frame and supported from the above jacks. The jacks are supported through distributing devices from lower thrust angles installed on a mortar layer; with that, the supporting structure of the hold-down device is made in the form of at least two steel thrust members symmetrically adjacent to the load-carrying structure. A steel thrust member includes a flange of a U-shaped cross-section, which is provided with a wall exceeding the flange height and with ribs located in a T-shaped manner on the flange, by means of one of which with the wall part projecting above the flange there formed is a mating slot for the transverse support plank of the metal frame. The wall is located in a gap between the load-carrying structure and the transverse support plank, and under the second rib there located is a jack transmitting the thrust force through the steel thrust member and the transverse support plank to the metal frame.
EFFECT: reduction of material consumption.
4 cl, 4 dwg
SUBSTANCE: metal support is designed in the form of interconnected vertical pillars and horizontal beams, assembled in a single frame, intended for mounting and fixing inside the tank. Vertical pillars in the upper part of the tank are fixed to the support ring of the tank by means of bolt connection, and are welded to the edge sheet in the lower part of the tank through the glass. Metal support is also provided with fixing anchors, located along the perimeter of the repair area perpendicularly to the vertical pillars and horizontal beams. Metal support comprises the mean for moving fixing anchors relative to the vertical pillars, horizontal beams and vertical wall of the tank.
EFFECT: improving the repair quality of the tank wall.
4 cl, 4 dwg
SUBSTANCE: device to seal areas of metal-concrete adjacency comprises a plate steel part of protective sealed doors, hatches or flanges of tubular inputs of engineering utilities with holes for injectors. Holes are evenly arranged along the steel part. The device comprises a source of DC current with a rheostat or an autotransformer and an electromagnet. The electromagnet is installed on the steel part, with a coil in the form of a winding from current-conducting wire with insulation and ends of this wire, closed to poles of the source of DC current. The coil of the electromagnet is arranged on a crossbeam of the U-shaped magnetic conductor. The lower part of each stand of the magnetic conductor fully complies with the shape, volume and geometric dimensions of the inner space of the hole for the injector. The height of the lower part of magnetic conductor stands is equal to thickness of the steel part. The distance between centres of cross sections of the electromagnet magnetic conductor stands is equal to double distance between centres of holes for injectors.
EFFECT: device makes it possible to increase quality of sealing, to reduce power inputs and consumption of materials.
SUBSTANCE: invention relates to the field of construction, in particular, to the method to reinforce precast panels of cellular concrete surface. The method of reinforcement consists in the fact that the roof structure is opened along the seam of coupling of adjacent panels for the width of 300-400 mm. Then they cut through slots with width of 85-90 mm along the seams through the entire length of the panel, afterwards they insert longitudinal steel beams into the slots from the top, having gussets at the bottom to fix cross beams. Cross beams are connected to longitudinal beams and are connected by gussets with longitudinal beams by assembling bolts. Gaps between cross beams and the reinforced panel are filled with concrete, and gaps between longitudinal beams and side surfaces of panels are filled with construction foam. The slot above the surface of longitudinal beams is filled with a heat insulation material, then the roof design is restored, and steel reinforcing elements protruding beyond the ceiling surface are coated by protective materials.
EFFECT: increased bearing capacity of a coating panel.
4 cl, 8 dwg
SUBSTANCE: method to reconstruct a building or a facility includes installation of stiffening cores inside a building or their erection to perceive load from bearing elements of the building or facility carcass. Stiffening cores are installed with a gap in respect to reinforced spans of floors, under which bearing girders are mounted. Girders are fixed in stiffening cores at the depth of at least half of thickness of the appropriate stiffening core perpendicularly to the latter and are connected as fixed with spans. Spans are made in the form of crossbars and floors, or crossbars, or floors. Ends of bearing girders are embedded into stiffening cores.
EFFECT: increased stability of a building.
SUBSTANCE: invention relates to the field of construction and may be used for radical reinforcement of slabs exposed to durable impact of aggressive medium and having practically lost bearing capacity. The device to reinforce a solid reinforced concrete slab includes several reinforcement elements and comprises two additional solid reinforced concrete slabs arranged on the top and at the bottom and combined to each other by means of reinforced concrete keys. The lower slab is equipped with rods with helical thread at the ends, performing the function of the pre-stressed working reinforcement, connected on nuts with anchors, which serve as stops for them. Anchors are connected with the main slab as a dowel by epoxide glue. Keys are equipped with vertical rods performing simultaneously the function of working reinforcement of keys and function of suspension in fixation of the lower slab formwork. The surface of contact between the main and lower slabs is equipped with a layer of compound on the basis of epoxide resin preventing access of aggressive medium to working reinforcement.
EFFECT: increased bearing capacity, stiffness and crack resistance of a slab.
SUBSTANCE: method to reinforce structures of a building cover, comprising bearing structures, runs and an enclosure, consists in installation of reinforcement beams from channels resting against bearing structures between existing runs. In the areas of resting of reinforcement beams onto bearing structures they cut a section of an upper shelf of a channel, using welding, they fix a similar section at the opposite side, turning cross sections of the channel into a z-shaped one. Final installation of reinforcement beams is carried out by means of their rotation around the longitudinal axis.
EFFECT: reduced labour intensiveness during installation of a cover and increased reliability of joint operation of cover structures after reinforcement.
SUBSTANCE: invention relates to the field of construction, namely, to a support element designed for pasting-in into brick masonry and used in assemblies of slab support. The support element comprises a central rod and end anchor parts. The central rod is made of a concrete cylinder, having longitudinal corrugations on the outer side for better spread of an injectable formulation with depth of 0.1-0.5 cm and two transverse corrugations for installation of fixing rings with depth of 0.1-0.5 cm: an inner aligning ring in the form of a sprocket and an outer fixing ring with a reference hole in the upper part. In the centre of the cylinder there is a through hole for installation of the nozzle into it for injection of the chemical formulation.
EFFECT: increased strength of a support element.
3 cl, 3 dwg
SUBSTANCE: device to reinforce beam structures includes prestressed four-branch braced ties fixed at ends of the beam in its upper part, resting in areas of bending at hinged cylindrical supports with a pad, installed in the lower part of the beam and tightened by yokes. In the upper end zone of the beam there are angular profiles installed onto a footing, where braced ties are fixed as a tightened assembly.
EFFECT: increased bearing capacity due to balance of forces in all bands of a braced system.
2 cl, 4 dwg
SUBSTANCE: invention relates to the field of construction, in particular to protection against oxidation of the active and passive frames laid in the concrete mass. A method of injecting fluid into a porous material or a material having boundary lines, comprising the following steps is revealed in the invention: attachment of an injector to the indicated material, which defines the boundaries of a compression chamber at least with one surface of the indicated material; injection of the indicated fluid into the indicated compression chamber under low pressure; influence on the indicated fluid by an acoustic wave of high power by means of an oscillating element, passing directly into the indicated compression chamber.
EFFECT: provision of deep impregnation of surfaces or boundary lines of heterogeneous materials.
14 cl, 3 dwg
FIELD: building, particularly for concrete structures reinforcing.
SUBSTANCE: structure includes trussed tie bar and additional compressed member. Structure is provided with telescopic post having spring. Post is arranged between trussed tie bar and compressed member formed of channel bar. Compressed member is located in level with lower belt of beam to be reinforced and encloses it. Trussed tie bar ends are connected to compressed member, which in turn is secured to beam to be reinforced by compressed member ends through collars.
EFFECT: increased load-bearing capacity, reliability and service life of reinforced concrete floor beams and longitudinal ribs of ribbed slabs, possibility of full residue bearing capacity usage of structure.
FIELD: building, particularly to prevent separation of roofing material layers during roof repair.
SUBSTANCE: method involves injecting material forming liquid bitumen layer in roof area of separation through orifices arranged in waterproofing mat above the area; consolidating the area to be repaired. Orifices are spaced 0.2-2.0 m apart. At the beginning of material injection process air or water is removed from the cavities through above orifices and then emulsified bitumen, including 30-80% of bitumen, is fed. Emulsified bitumen is spread in cavity over the full area of separation using weight, which is moved over the roof surface. Before compaction the area of separation is heated up to 100-160°C and then held at this temperature up to bitumen dewatering and water vapor discharge from the area through above orifices in atmosphere.
EFFECT: increased reliability of waterproofing mat gluing in presence of water cavities regardless of separation area and reduced time of roof repair.
FIELD: building, particularly building reconstruction.
SUBSTANCE: method involves forming main drilled piles along building foundation perimeter, where the piles are arranged outside the foundation; mounting the main load-bearing supports on the drilled piles so that load-bearing supports are arranged in pairs from opposite sides of the building; mounting load-bearing girders on load-bearing vertical support heads, wherein the bearing girders are arranged in rows; erecting additional stories on the bearing girders. Main drilled piles extend for depth not less than building foundation depth in ground. Upper pile parts are pulled together in pairs. Additional drilled piles adapted to support additional load-bearing vertical supports are driven outside the building foundation beyond the main ones. At least one additional load-bearing support is arranged in the main vertical support row from one building side.
EFFECT: prevention of service performance reduction.
16 cl, 2 dwg, 2 ex
FIELD: building, particularly to recover load-bearing capacity of reinforced concrete frames of industrial and civil buildings.
SUBSTANCE: method to recover load-bearing capacity of reinforced concrete column subjected to concrete and reinforcement corrosion by column surface moistening, scoring, column cross-section widening, enclosing with ferrule and reduction of longitudinal compressing force application eccentricity involves deforming steel pipe; reducing steel pipe cross-section by compressing thereof with two rollers to impart oval cross-section to the pipe so that major oval axis is equal to three minor axes; cutting the pipe in longitudinal direction; inserting damaged column in steel ferrule so that major cross-sectional axis is directed in plane of compressing force application eccentricity and reducing eccentricity; connecting two halves of oval pipe in air-tight manner and filling gaps between steel ferrule and damaged column with expanding fine concrete injected through nozzles in the cavities in bottom-top direction; compacting concrete with vibratory action and applying stress to cross-section during concrete setting by compressing thereof from all sides by steel form to reinforce the whole structure.
EFFECT: possibility to recover load-bearing building frame capacity without production process stopping and decreased labor inputs.
FIELD: building, particularly to repair beams, walls, columns and poles.
SUBSTANCE: method involves installing reinforcing members on structure to be reinforced and connecting the members with fastening members; welding the fastening members to one reinforcing member; heating thereof and welding the heated members to opposite reinforcing member; terminating the heating operation. The fastening members may be installed between reinforcing member surfaces or laid on ends thereof. In the first case initial fastening member length is determined from the following equation: L=SBH-α·(T-Ta), where SBH is distance between inner reinforcing member surfaces, α is linear expansion factor of fastening member material, T is fastening member heating temperature, Ta is ambient temperature. In the second case fastening member length is defined as L≥So, where So is distance between outer surfaces of reinforcing members.
EFFECT: increased reliability of structure to be reinforced.
FIELD: building, particularly roof repair and waterproofing.
SUBSTANCE: method involves arranging roof paper between coating area to be repaired and movable heating member; heating organic binding material to soften thereof by means of the heating member; compacting the coating along with rolling-on roofing paper to heated coating.
EFFECT: increase service life of waterproof covering.
5 cl, 1 tbl
FIELD: building, particularly to repair waterproof coatings and roof coverings including organic binding agent.
SUBSTANCE: method involves determining brittle temperature of organic binding agent; calculating plastic range thereof; heating organic binding covering with heating member laid on the covering and compacting the covering. The organic binding agent is heated up to temperature 1.6-3.2 times greater than plastic range.
EFFECT: increased service life of repaired coating and increased quality thereof.
FIELD: repairing, for instance filling cracks, restoring, altering, enlarging, particularly for repairing monuments, museum pieces and applied and decorative art pieces.
SUBSTANCE: method involves drying joint and filling thereof with dry non-combustible materials before lead-based molten material pouring in joint; filling the joint with lead-based molten material, which is supplied through pouring channel system made of molding material, wherein the molding material provides predetermined geometry of sealed joint. The molten material is supplied as continuous jet. Joint to be sealed may be located in vertical or horizontal planes or in plane inclined at 0-90° angle with respect to horizontal plane. The lead-based molten material may be reused for repairing work performing.
EFFECT: reduced labor inputs and material consumption, increased environmental safety and joint sealing reliability, elimination of additional mechanical or chemical treatment.
17 cl, 2 dwg
FIELD: construction, particularly building reconstruction.
SUBSTANCE: method involves erecting foundation of inserted structure, forming through pass in-between and constructing one or several stories over the foundation. The stories are built of kit including vertical panels and floor panels, which are connected with existent building walls by tie members. Joints are hermetically sealed. Floor panels are installed on guiding means having opened parts. Opened parts of guiding means are welded with each other after structure assemblage. Roofs of adjacent buildings are extended up to inserted structure walls. Projection adapted to drain water from the structure is hermetically installed over joint between the roof and the inserted structure. Guiding means are made as outer centralizers in upper parts of vertical and floor panels and as inner centralizers in lower panel parts.
EFFECT: increased strength and air-tightness.
12 cl, 14 cl, 2 ex
FIELD: construction, particularly working measures on existing buildings.
SUBSTANCE: superstructure skeleton comprises lower row transversal frames arranged within the limits of building length and lower end transversal frames projecting out of the building length and including two belts. The end transversal frames have columns and trusses located from building outside and provided with parallel belts. Arranged in the trusses are upper row and end frames having two belts and including columns and trusses. Skeleton also comprises floor panels. Lower superstructure stories are provided with central columns installed in lower frame truss joints and are united with each other by structural stands of intermediate stories. Space of one intermediate story is free of frame structures. Main beams of upper intermediate stories are secured to upper frame trusses by means of suspension brackets.
EFFECT: decreased metal consumption of superstructure skeleton.