Composite comb plate type bridge expansion device with multidirectional adjusting function

Abstract

The invention relates to the technical field of bridge expansion devices, in particular to a composite comb plate type bridge expansion device with a multidirectional adjusting function, which comprises two oppositely arranged beam body end parts, a comb plate expansion device and a multi-angle deformation adjusting device, reserved grooves are formed in the opposite sides of the ends of the two beam bodies, a bridge expansion joint is formed between the two reserved grooves, comb plate expansion devices are arranged in the two reserved grooves, the two comb plate expansion devices are symmetrically arranged on the two sides of the bridge expansion joint, and a multi-angle deformation adjusting device is arranged under the bridge expansion joint. The multi-angle deformation adjusting device is respectively connected with the end parts of the beam body on two sides; through the comb plate expansion and contraction device, the stretching and compression free deformation and the expansion and contraction free change of the ends of the two beam bodies caused by factors such as temperature change and concrete shrinkage are allowed, so that the stress concentration phenomenon between the ends of the two beam bodies is effectively released and resolved; the multi-angle deformation adjusting device can ensure multi-direction and multi-angle stress release of the bridge body.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge expansion and contraction devices, and in particular to a composite comb plate type bridge expansion and contraction device with multi-directional adjustment function. Background Art

[0002] In order to meet the needs of bridge structure deformation, expansion joints need to be set at the ends of the upper structure bridge or at the abutments. In order to allow vehicles to pass through the expansion joints of the bridge deck smoothly, comfortably and safely and to avoid stress concentration on the upper structure of the bridge, to meet the needs of free expansion and contraction of the beam ends and corner deformation, expansion devices should be set at the expansion joints. The expansion device is an important auxiliary facility of the bridge. It should be made of durable, anti-seepage, anti-skid and other good materials and structural forms according to the length and structure of the bridge. It is easy to clean, repair and replace. The factors that cause the expansion and contraction of the bridge expansion device include: the expansion and contraction (beam elongation, beam shortening) caused by temperature changes (temperature rise and fall, temperature difference in different parts of the beam body), the shortening of the beam body caused by concrete shrinkage, the shortening of the beam body caused by concrete creep, the shear deformation of the plate rubber bearing caused by the braking force of the car, the opening or closing of the expansion joint, as well as earthquake action, wind load, beam deflection, etc. The expansion device should meet the requirements of the longitudinal, transverse and vertical deformation of the bridge.

[0003] The expansion devices produced in the finalized form mainly include modular expansion devices (MA, MB), comb plate expansion devices (SC, SSA, SSB), and seamless expansion devices (W), which can effectively release the stress concentration at the beam end, allowing the beam end to deform and expand freely, and can meet the small deformation and dislocation performance under the conditions of horizontal friction and uniform deformation. When the deformation of the bridge causes the expansion device to have significant lateral, longitudinal and vertical dislocations, the expansion device will produce large plane rotation angles, fan-shaped displacement angles and vertical rotation angles. The performance of the expansion devices produced in the finalized form needs further improvement and special research, and deformation performance testing should be carried out.

[0004] The Chinese invention patent with publication number CN106284062A discloses a bridge telescopic unit component and a bridge telescopic device. The bridge telescopic unit component can complete horizontal rotation, vertical rotation and twisting action through the deformation of the displacement column body, fully satisfying the displacement of the bridge superstructure under the action of external force, and meeting the shock absorption requirements. However, during use, the above telescopic device can only achieve free telescopic expansion. When the beam body is partially loaded or misaligned, it cannot achieve free adjustment of the angle offset deformation, resulting in the beam body stress caused by the angle offset cannot be effectively released, affecting the quality of the bridge body; in addition, the overall structural strength is low and difficult to assemble, the protective performance is also poor, and the use effect is not ideal. Summary of the invention

[0005] In order to solve the technical problems existing in the prior art, the present invention provides a composite comb plate type bridge expansion device with multi-directional adjustment function.

[0006] In order to achieve the above-mentioned objectives, the present invention proposes a composite comb-tooth plate type bridge expansion device with multi-directional adjustment function, comprising: two relatively arranged beam ends, a comb-tooth plate expansion device and a multi-angle deformation adjustment device; reserved grooves are provided on the opposite sides of the two beam ends, a bridge expansion joint is formed between the two reserved grooves, the comb-tooth plate expansion device is provided in the two reserved grooves, the two comb-tooth plate expansion devices are symmetrically arranged on both sides of the bridge expansion joint, the multi-angle deformation adjustment device is provided directly below the bridge expansion joint, and the multi-angle deformation adjustment device is respectively connected to the beam ends on both sides thereof. Through two relatively symmetrical comb plate expansion devices, the two ends of the beam body can be allowed to freely deform in tension and compression caused by temperature changes, concrete shrinkage, creep, automobile loads and other factors, and the expansion amount can change freely, so that the stress concentration phenomenon between the two ends of the beam body can be effectively released and resolved, avoiding the occurrence of tensile stress in the full prestressed concrete components, avoiding the tensile stress of Class A prestressed concrete components greater than the design value of the axial tensile strength, and avoiding the maximum crack width calculated value of reinforced concrete components and Class B prestressed concrete components greater than the maximum crack width limit; in addition, since the surface of the steel fiber concrete is flush with the surface of the beam end, it can ensure that the bridge deck vehicles pass smoothly, comfortably and safely, and the overall structure of the expansion device is stable, reliable and safe. In addition, by setting the angle deformation adjustment device, the multi-angle deformation adjustment device is provided directly below the bridge expansion joint, and the multi-angle deformation adjustment device is connected to the beam ends on both sides thereof. The two ends of the beam can meet the needs of free adjustment of multi-angle deformation caused by local load, twisting deformation, dislocation deformation, load angle, longitudinal slope of the beam, etc. through the multi-angle deformation adjustment device, which can ensure the stress release of the bridge body in multiple directions and angles, and the overall structure is stable and easy to assemble.

[0007] As an optional implementation scheme, in the composite comb-tooth plate type bridge expansion device with multi-directional adjustment function provided by the present invention, the comb-tooth plate expansion device includes a expansion body, a plurality of comb-tooth plates arranged at intervals are provided on the expansion body, an elastic member is provided on the expansion body, and a plurality of U-shaped embedded ribs are provided on the outer side of the expansion body away from the comb-tooth plates. The expansion body is fixed in the reserved groove by the U-shaped embedded ribs, and the expansion body is fixed by setting a plurality of U-shaped embedded ribs.

[0008] As an optional implementation scheme, in the composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention, a corner cutout is provided on the side of the expansion body close to the reserved groove, and one end of the U-shaped embedded bar is anchored on the outside of the expansion body, and the other end is anchored in the corner cutout. In order to ensure that the expansion body is stably placed on the reserved groove, the comb plate expansion device is provided with a corner cutout close to the bottom surface of the beam end; after the expansion body is stably installed on the reserved groove, the pressure strip is arranged in the corner cutout of the expansion body, thereby ensuring the stable fixation of the expansion body, and one end of the U-shaped embedded bar is fixed on the outside of the expansion body, and the other end is fixed in the corner cutout to enhance the overall stability.

[0009] As an optional implementation scheme, in the composite comb-tooth plate type bridge expansion device with multi-directional adjustment function provided by the present invention, the comb-tooth plates of the two opposite expansion bodies are staggered with each other, and a gap is left between the two adjacent comb-tooth plates. An elastic expansion buffer is provided in the gap, and the elastic expansion buffer is set up in a U-shaped circuitous manner. Since a comb-tooth plate is provided on each side of the expansion joint, and when the comb-tooth plate extends toward the other expansion body, the expansion joint spacing between the two beam ends is compressed and approaches each other, and the comb-tooth plates set up at intervals also undergo lateral displacement. Similarly, the same is true when the two beams are separated from each other, thereby achieving free expansion and contraction deformation of the beam ends. When the two beam ends are expanded and contracted, the comb-tooth plates on both sides will compress and rebound the elastic expansion buffer. Since the elastic expansion buffer is set up in a U-shaped circuitous manner, the gap between the comb-tooth plates can be blocked to prevent debris from entering the expansion joint, thereby improving the service life and stability of the comb-tooth plate expansion device.

[0010] As an optional implementation scheme, in the composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention, a plurality of inverted U-shaped embedded anchor bars and transverse connecting support bars are provided in the reserved groove, the inverted U-shaped embedded anchor bars are embedded in the reserved groove, the U-shaped embedded bars are aligned with the top of the inverted U-shaped embedded anchor bars and the two are set at intervals, the transverse connecting support bars penetrate all the inverted U-shaped embedded anchor bars and the U-shaped embedded bars, and the U-shaped embedded bars of the expansion body are welded and connected to the inverted U-shaped embedded anchor bars through the transverse connecting support bars. This is to facilitate fixing the comb plate expansion device in the reserved groove to achieve a fixing effect.

[0011] As an optional implementation scheme, in the composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention, the multi-angle deformation adjustment device includes two angle deformation displacement bins and displacement slide rails arranged opposite to each other, the two angle deformation displacement bins are connected by the displacement slide rails, the two angle deformation displacement bins are respectively connected to the bottom of the beam ends on both sides, and the displacement slide rails can freely rotate and move at multiple angles and directions. The two ends of the displacement slide rails never leave the angle deformation displacement bins, and when the two beam ends are expanded and contracted, the displacement slide rails will also be displaced accordingly.

[0012] As an optional implementation scheme, in the composite comb-tooth plate type bridge expansion device with multi-directional adjustment function provided by the present invention, fixed side plates for limiting are respectively provided on both sides of the displacement slide rail, and a damping spring is provided between the two fixed side plates on the same side. The angle of the end of the displacement slide rail can be changed in the angle deformation displacement bin, and can effectively adapt to the misaligned deformation of the ends of the beams on both sides to produce larger plane rotation angles, fan-shaped displacement angles and vertical rotation angles.

[0013] As an optional implementation scheme, in the composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention, a sliding block is provided in the angle deformation displacement bin, lateral guide rails are symmetrically provided in the middle of both sides of the sliding block, and a displacement card slot matching the lateral guide rail is provided in the middle of the inner wall of the angle deformation displacement bin, and the sliding block can freely expand and contract in the angle deformation displacement bin through the lateral guide rail and the displacement card slot, and a direction ball is provided at the end of the displacement slide rail, and a ball hole bin is provided on the side of the sliding block close to the direction ball, and the angle of the displacement slide rail is freely adjusted in the sliding block through the direction ball, and an elastic rubber layer is provided on the inner wall of the ball hole bin. The two ends of the beam body can meet the expansion and contraction needs of the beam body caused by local load, twisting deformation, dislocation deformation, load rotation angle, longitudinal slope of the beam body and other factors through the angle deformation displacement bin, which can ensure the multi-directional and multi-angle stress release of the bridge body.

[0014] As an optional implementation scheme, in the composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention, a telescopic water-conducting sealing belt is provided in the expansion joint of the bridge along the vertical direction of the bridge centerline, and the two sides of the telescopic water-conducting sealing belt are respectively fixed on the surface of the reserved groove. When the expansion joints at the ends of the adjacent beam bodies are freely expanded and contracted, the telescopic water-conducting sealing belt also deforms accordingly, which is a water-conducting device that can play a shielding and protective role. In addition, the telescopic water-conducting sealing belt can also prevent rainwater, debris, dust or gravel from eroding and wearing the ends of the beam bodies, thereby improving the service life and durability of the beam bodies.

[0015] As an optional implementation, in the composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention, a pressure strip is provided on the surface of the reserved groove, and the pressure strip is fixed to the expansion water guide sealing belt by bolts. The pressure strip matches the corner cutout to ensure the stable fixation of the expansion body.

[0016] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0017] 1. The composite comb-tooth plate type bridge expansion device with multi-directional adjustment function provided by the present invention is provided with two relatively arranged beam ends, a comb-tooth plate expansion device and a multi-angle deformation adjustment device; reserved grooves are provided on the opposite sides of the two beam ends, a bridge expansion joint is formed between the two reserved grooves, the comb-tooth plate expansion devices are provided in the two reserved grooves, and the two comb-tooth plate expansion devices are symmetrically arranged on both sides of the bridge expansion joint. Through the two relatively symmetrically arranged comb-tooth plate expansion devices, the two beam ends can be allowed to deform freely in tension and compression caused by temperature changes, concrete shrinkage, creep, automobile loads and other factors, and the expansion amount can change freely, so that the stress concentration phenomenon between the two beam ends can be effectively released and resolved, avoiding the occurrence of tensile stress in the full prestressed concrete components, avoiding the tensile stress of Class A prestressed concrete components to be greater than the design value of the axial tensile strength, and avoiding the maximum crack width calculated value of reinforced concrete components and Class B prestressed concrete components to be greater than the maximum crack width limit.

[0018] 2. The composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention is provided with an angle deformation adjustment device, and the multi-angle deformation adjustment device is provided directly below the bridge expansion joint, and the multi-angle deformation adjustment device is respectively connected to the ends of the beam body on both sides thereof. The two ends of the beam body can meet the expansion and contraction needs of the beam body caused by local load, twisting deformation, dislocation deformation, load rotation angle, longitudinal slope of the beam body and other factors through the multi-angle deformation adjustment device, which can ensure the multi-directional and multi-angle stress release of the bridge body, and the overall structure is stable and easy to assemble.

[0019] 3. In addition, a whole-piece installed retractable water-conducting sealing belt is arranged between the reserved grooves. It is a water-conducting device that can play a shielding and protective role. In addition, the retractable water-conducting sealing belt can also prevent rainwater, debris, dust or gravel from eroding and wearing the ends of the beam, thereby improving the service life and durability of the beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of a composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention;

[0022] Figure 2 A schematic diagram of the structure of a composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention along the bridge side;

[0023] Figure 3 A schematic diagram of the cross-sectional structure along the bridge direction of a composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention;

[0024] Figure 4 A schematic structural diagram of a comb plate expansion and contraction device of a composite comb plate bridge expansion and contraction device with multi-directional adjustment function provided by the present invention;

[0025] Figure 5 A schematic structural diagram of an elastic telescopic buffer member of a composite comb plate bridge telescopic device with multi-directional adjustment function provided by the present invention;

[0026] Figure 6 A schematic diagram of the structure of a beam end and a reserved groove of a composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention;

[0027] Figure 7 A bottom view schematic diagram of the installation of a multi-angle deformation adjustment device of a composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention;

[0028] Figure 8 A schematic structural diagram of a multi-angle deformation adjustment device of a composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention;

[0029] Fig. 9 A schematic diagram of various components of a multi-angle deformation adjustment device of a composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention;

[0030] Fig.10 A schematic diagram of the installation structure of a telescopic water-conducting sealing belt of a composite comb-tooth plate bridge telescopic device with multi-directional adjustment function provided by the present invention.

[0031] [Description of Reference Numerals]

[0032] 1. Beam end; 11. Reserved groove; 111. Inverted U-shaped embedded anchor bar; 112. Transverse connecting support bar; 12. Bridge expansion joint;

[0033] 2. Comb plate telescopic device; 21. Telescopic body; 22. Comb plate; 23. Elastic member; 24. U-shaped embedded ribs; 25. Corner cutouts; 26. Elastic telescopic buffer member;

[0034] 3. Multi-angle deformation adjustment device; 31. Angle deformation displacement bin; 311. Sliding block; 312. Lateral guide rail; 313. Displacement slot; 32. Displacement slide rail; 321. Direction ball; 322. Ball hole bin; 33. Fixed side plate; 34. Damping spring;

[0035] 4. Telescopic water-conducting sealing strip; 41. Pressure strip; 42. Bolt;

[0036] 5. Steel fiber concrete. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that all directional indications in the embodiments of the present invention, such as first, second, up, down, left, right, front, back, etc., are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] The present invention provides a composite comb plate bridge expansion device with multi-directional adjustment function, such as Figure 1-Figure 10As shown, it comprises: two beam ends 1 arranged opposite to each other, a comb plate expansion device 2 and a multi-angle deformation adjustment device 3; reserved grooves 11 are arranged on opposite sides of the two beam ends 1, a bridge expansion joint 12 is formed between the two reserved grooves 11, the comb plate expansion devices 2 are arranged in the two reserved grooves 11, the two comb plate expansion devices 2 are symmetrically arranged on both sides of the bridge expansion joint 12, the multi-angle deformation adjustment device 3 is arranged directly below the bridge expansion joint 12, and the multi-angle deformation adjustment device 3 is connected to the beam ends 1 on both sides thereof respectively. Figure 1 and Figure 2 As shown, through two relatively symmetrically set comb plate expansion devices 2, the two beam ends 1 can be allowed to freely deform in tension and compression caused by temperature changes, concrete shrinkage, creep, vehicle loads and other factors, and the expansion and contraction amount can change freely, so that the stress concentration phenomenon between the two beam ends 1 can be effectively released and resolved, avoiding the occurrence of tensile stress in the full prestressed concrete components, avoiding the tensile stress of Class A prestressed concrete components greater than the design value of the axial tensile strength, and avoiding the maximum crack width calculated value of the reinforced concrete components and Class B prestressed concrete components greater than the maximum crack width limit; in addition, as Figure 7 As shown, by setting the angle deformation adjustment device, the multi-angle deformation adjustment device 3 is provided just below the bridge expansion joint 12, and the multi-angle deformation adjustment device 3 is respectively connected to the beam ends 1 on both sides thereof. The two beam ends 1 can meet the expansion and contraction needs of the beam body caused by local load, twisting deformation, dislocation deformation, load angle, longitudinal slope of the beam body and other factors through the multi-angle deformation adjustment device 3, which can ensure the multi-directional and multi-angle stress release of the bridge body, and the overall structure is stable and easy to assemble. Figure 3 As shown, steel fiber concrete 5 is provided at the connection between the comb plate telescopic device 2 and the beam end 1, and the surface of the steel fiber concrete 5 is flush with the surface of the beam end 1. Since the surface of the steel fiber concrete 5 is flush with the surface of the beam end 1, it can ensure that the vehicles on the bridge deck pass smoothly, comfortably and safely, and the overall structure of the telescopic device is stable, reliable and safe.

[0041] Further, such as Figure 1 and Figure 4As shown, in the composite comb-tooth plate type bridge expansion and contraction device with multi-directional adjustment function provided by the present invention, the comb-tooth plate expansion and contraction device 2 includes a expansion and contraction body 21, a plurality of comb-tooth plates 22 arranged at intervals are provided on the expansion and contraction body 21, an elastic member 23 is provided on the expansion and contraction body 21, and a plurality of U-shaped embedded ribs 24 are provided on the outer side of the expansion and contraction body 21 away from the comb-tooth plates 22. The expansion and contraction body 21 is fixed in the reserved groove 11 by the U-shaped embedded ribs 24. The expansion and contraction body 21 and the plurality of comb-tooth plates 22 are arranged on the expansion and contraction body 21 for easy coordination. The comb-tooth plates 22 are arranged on the expansion and contraction body 21, and the comb-tooth plates 22 extend toward the other expansion and contraction body 21, resulting in compression of the expansion and contraction gap spacing between the two beam ends 1, and the comb teeth are staggered and close to each other, and the comb-tooth plates 22 arranged at even intervals also undergo lateral displacement, so as to realize the free expansion and contraction deformation of the beam end 1. The telescopic body 21 is provided with an elastic member 23, which is an elastic rubber member. The elastic member 23 can be made of chloroprene rubber, natural rubber and EPDM rubber materials that can undergo elastic deformation. The telescopic body 21 is a telescopic steel structure, and the steel material of the telescopic steel structure is preferably Q235 grade steel and Q345 grade steel. When the bridge structure is in a chloride environment, the telescopic device is preferably made of Q335NHD, Q235NHE grade steel and Q355NHD, Q355NHE grade steel.

[0042] Furthermore, Figure 4 As shown, in the composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention, a corner cutout 25 is provided on the side of the expansion body 21 close to the reserved groove 11, and one end of the U-shaped embedded bar 24 is anchored on the outside of the expansion body 21, and the other end is anchored in the corner cutout 25. In order to ensure that the expansion body 21 is stably placed on the reserved groove 11, the comb plate expansion device 2 is provided with a corner cutout 25 close to the bottom surface of the beam end; after the expansion body 21 is stably installed on the reserved groove 11, the pressure strip 41 is provided in the corner cutout 25 of the expansion body 21, thereby ensuring the stable fixation of the expansion body 21, and one end of the U-shaped embedded bar 24 is fixed on the outside of the expansion body 21, and the other end is fixed in the corner cutout 25, so as to enhance the overall stability.

[0043] In addition, in the composite comb plate type bridge expansion device with multi-directional adjustment function provided by the present invention, the comb plates 22 of the two opposite expansion bodies 21 are arranged alternately, and a gap is left between the two adjacent comb plates 22, and an elastic expansion buffer 26 is provided in the gap, such as Figure 5As shown, the elastic telescopic buffer 26 is set up in a U-shaped circuitous manner. Since a comb plate 22 is provided on each side of the telescopic body 21 at the expansion joint, and when the comb plate 22 extends toward the other telescopic body 21, the expansion joint spacing between the two beam ends 1 is compressed and close to each other, and the comb plates 22 set up at intervals also undergo lateral displacement. Similarly, the same is true when the two beams are separated from each other, thereby achieving free expansion and contraction deformation of the beam ends 1. When the two beam ends 1 are expanded and contracted, the comb plates 22 on both sides will compress and rebound the elastic telescopic buffer 26. Since the elastic telescopic buffer 26 is set up in a U-shaped circuitous manner, it can block the gap between the comb plates 22 to prevent debris from entering the expansion joint, thereby improving the service life and stability of the comb plate expansion and contraction device 2.

[0044] like Figure 1 , Figure 2 and Figure 6 As shown, in the composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention, a plurality of inverted U-shaped embedded anchor bars 111 and transverse connecting support bars 112 are provided in the reserved groove 11, the inverted U-shaped embedded anchor bars 111 are embedded in the reserved groove 11, the U-shaped embedded bars 24 are aligned with the top of the inverted U-shaped embedded anchor bars 111 and the two are set apart, the transverse connecting support bars 112 penetrate all the inverted U-shaped embedded anchor bars 111 and the U-shaped embedded bars 24, and the U-shaped embedded bars 24 of the expansion body 21 are welded and connected with the inverted U-shaped embedded anchor bars 111 through the transverse connecting support bars 112. So as to fix the comb plate expansion device 2 in the reserved groove 11 to achieve the fixing effect.

[0045] After the comb-tooth plate expansion and contraction device 2 is fixed in the reserved groove 11 by the inverted U-shaped embedded anchor bars 111 and the transverse connecting support bars 112, the steel fiber concrete 5 is poured at the junction of the comb-tooth plate expansion and contraction device 2 and the beam end 1. The standard value of the flexural tensile strength of the steel fiber concrete 5 should be selected according to the traffic load level, not less than 5MPa for light traffic, not less than 5.5MPa for medium traffic, and not less than 6MPa for extra-heavy and heavy traffic. The steel fiber concrete 5 should be mixed with a mixer during construction, and it should be ensured that the steel fibers are evenly dispersed in the mixture without cohesion, so that the comb-tooth plate expansion and contraction device 2 and the beam end 1 form a whole, and the overall structural strength and rigidity of the expansion and contraction device are guaranteed. During construction, first check the size of the reserved groove 11, and check the specifications, quantity and position of the inverted U-shaped embedded anchor bars 111, then roughen the concrete in the reserved groove 11 and clean it; then hoist the two telescopic bodies 21 to ensure that the center lines of the two telescopic bodies 21 coincide with the center line of the expansion joint; after the hoisting is completed, each U-shaped embedded bar 24 is arranged between two adjacent inverted U-shaped embedded anchor bars 111, and at this time, the transverse connecting support bar 112 is passed through all the U-shaped embedded bars 24 and the inverted U The inverted U-shaped embedded anchor bar 111 is then welded firmly to the transverse connecting support bar 112, the U-shaped embedded bar 24 and the inverted U-shaped embedded anchor bar 111. The weld should be welded with gas shielded welding and the welding grade should be II. The weld should not have defects such as cracks, slag inclusions, incomplete fusion, incomplete arc pits, dislocation and burns, so that the beam end 1, the inverted U-shaped embedded anchor bar 111 and the transverse connecting support bar 112, and the telescopic body 21 form a whole, which can greatly improve the overall strength, rigidity and stability of the bridge superstructure.

[0046] In the composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention, Figure 7 and Figure 8 As shown, the multi-angle deformation adjustment device 3 includes two angle deformation displacement bins 31 and displacement slide rails 32 arranged opposite to each other. The two angle deformation displacement bins 31 are connected by the displacement slide rails 32. The two angle deformation displacement bins 31 are respectively connected to the bottom of the beam end 1 on both sides. The displacement slide rails 32 can freely rotate and move in multiple angles and directions. The two ends of the displacement slide rails 32 never separate from the angle deformation displacement bins 31. When the two beam end 1s are extended or retracted, the displacement slide rails 32 will also be displaced accordingly.

[0047] Specifically, in the composite comb-tooth plate type bridge expansion device with multi-directional adjustment function provided by the present invention, fixed side plates 33 for limiting are respectively provided on both sides of the displacement slide rail 32, and a damping spring 34 is provided between the two fixed side plates 33 on the same side. The angle of the end of the displacement slide rail 32 can be changed in the angle deformation displacement bin 31, and can effectively adapt to the misaligned deformation of the ends 1 of the beams on both sides to produce larger plane rotation angles, fan-shaped displacement angles and vertical rotation angles.

[0048] Further, such as Fig. 9 As shown, in the composite comb-tooth plate bridge expansion device with multi-directional adjustment function provided by the present invention, a sliding block 311 is provided in the angle deformation displacement bin 31, and lateral guide rails 312 are symmetrically provided in the middle of both sides of the sliding block 311. A displacement card slot 313 matching the lateral guide rail 312 is provided in the middle of the inner wall of the angle deformation displacement bin 31. The sliding block 311 can freely expand and contract and move in the angle deformation displacement bin 31 through the lateral guide rail 312 and the displacement card slot 313. A direction ball 321 is provided at the end of the displacement slide rail 32, and a ball hole bin 322 is provided on the side of the sliding block 311 close to the direction ball 321. The angle of the displacement slide rail 32 can be freely adjusted in the sliding block 311 through the direction ball 321, and an elastic rubber layer is provided on the inner wall of the ball hole bin 322, and the elastic rubber layer is made of chloroprene rubber, natural rubber and EPDM rubber. The two beam ends 1 can meet the expansion and contraction needs of the beam body for free adjustment of multi-angle deformation caused by local load, twisting deformation, dislocation deformation, load rotation angle, longitudinal slope of the beam body, etc. through the angle deformation displacement chamber 31, and can ensure the multi-directional and multi-angle stress release of the bridge body.

[0049] During use, for example, if one of the beam ends 1 passes through a vehicle load, the beam end 1 will sink and deform slightly downward, at which time the compressed end of the displacement rail 32 will move downward, and the other uncompressed end will change angle through the direction ball 321; similarly, when the two beam ends 1 are extended or retracted, the displacement rail 32 moves in the angle deformation displacement bin 31 through the sliding block 311, the lateral guide rail 312 and the displacement slot 313, and the damping spring 34 releases stress, thereby meeting the expansion and contraction needs of the beam body caused by local load, torsional deformation, dislocation deformation, load angle, longitudinal slope of the beam body and other factors to freely adjust the multi-angle deformation, thereby ensuring the multi-directional and multi-angle stress release of the bridge body.

[0050] Further, such as Fig.10 As shown, in the composite comb plate bridge expansion device with multi-directional adjustment function provided by the present invention, a telescopic water-conducting sealing belt 4 is provided in the bridge expansion joint 12 along the vertical direction of the bridge centerline, and the two sides of the telescopic water-conducting sealing belt 4 are respectively fixed on the surface of the reserved groove 11. The telescopic water-conducting sealing belt 4 is a telescopic rubber sealing belt, which is mainly made of chloroprene rubber, natural rubber and EPDM rubber materials; when the expansion joint of the adjacent beam end 1 is freely expanded and contracted, the telescopic water-conducting sealing belt 4 is also deformed accordingly, which is a water-conducting device that can play a shielding and protective role. In addition, the telescopic water-conducting sealing belt 4 can also prevent rainwater, debris, dust or gravel from eroding and wearing the beam end 1, thereby improving the service life and durability of the beam.

[0051] The surface of the reserved groove 11 is provided with a pressure strip 41, and the pressure strip 41 is fixed to the telescopic water-conducting sealing strip 4 by bolts 42. Specifically, both sides of the telescopic water-conducting sealing strip 4 are fixed to the surface of the reserved groove 11 by stainless steel pressure strips 41 and high-strength bolts 42, and the pressure strip 41 matches the corner cutout 25 to ensure the stable fixation of the telescopic body 21.

[0052] It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, but the present invention is not limited to the above specific implementation methods. Any changes or modifications made within the scope of the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite comb plate bridge expansion device with multi-directional adjustment function, characterized in that: The invention comprises two beam ends (1) arranged opposite to each other, a comb plate expansion device (2) and a multi-angle deformation adjustment device (3); reserved grooves (11) are arranged on opposite sides of the two beam ends (1); a bridge expansion joint (12) is formed between the two reserved grooves (11); the comb plate expansion device (2) is arranged in the two reserved grooves (11); the two comb plate expansion devices (2) are symmetrically arranged on both sides of the bridge expansion joint (12); the multi-angle deformation adjustment device (3) is arranged directly below the bridge expansion joint (12); and the multi-angle deformation adjustment device (3) is respectively connected to the beam ends (1) on both sides thereof.

2. The composite comb plate bridge expansion device with multi-directional adjustment function according to claim 1 is characterized in that: The comb plate telescopic device (2) comprises a telescopic body (21), a plurality of comb plates (22) arranged at intervals are provided on the telescopic body (21), an elastic member (23) is provided on the telescopic body (21), a plurality of U-shaped embedded ribs (24) are provided on the outer side of the telescopic body (21) away from the comb plates (22), and the telescopic body (21) is fixed in the reserved groove (11) by means of the U-shaped embedded ribs (24).

3. The composite comb plate bridge expansion device with multi-directional adjustment function according to claim 2 is characterized in that: A corner cutout (25) is provided on one side of the telescopic body (21) close to the reserved groove (11); one end of the U-shaped embedded rib (24) is anchored on the outside of the telescopic body (21), and the other end is anchored in the corner cutout (25).

4. The composite comb plate bridge expansion device with multi-directional adjustment function according to claim 2 is characterized in that: The comb plates (22) of the two opposite telescopic bodies (21) are arranged in an interlaced manner, and a gap is left between two adjacent comb plates (22). An elastic telescopic buffer (26) is arranged in the gap, and the elastic telescopic buffer (26) is arranged in a U-shaped circuitous manner.

5. The composite comb plate bridge expansion device with multi-directional adjustment function according to claim 2 is characterized in that: A plurality of inverted U-shaped embedded anchor bars (111) and transverse connecting support bars (112) are arranged in the reserved groove (11); the inverted U-shaped embedded anchor bars (111) are embedded in the reserved groove (11); the top ends of the U-shaped embedded bars (24) and the inverted U-shaped embedded anchor bars (111) are aligned and arranged at a distance; the transverse connecting support bars (112) penetrate all the inverted U-shaped embedded anchor bars (111) and the U-shaped embedded bars (24); and the U-shaped embedded bars (24) of the telescopic body (21) are welded to the inverted U-shaped embedded anchor bars (111) through the transverse connecting support bars (112).

6. The composite comb plate bridge expansion device with multi-directional adjustment function according to claim 1 is characterized in that: The multi-angle deformation adjustment device (3) comprises two angle deformation displacement bins (31) and displacement slide rails (32) arranged opposite to each other, the two angle deformation displacement bins (31) are connected via the displacement slide rails (32), the two angle deformation displacement bins (31) are respectively connected to the bottom of the beam end (1) on both sides, and the displacement slide rails (32) can freely rotate and move in multiple angles and directions.

7. The composite comb plate bridge expansion device with multi-directional adjustment function according to claim 6 is characterized in that: Fixed side plates (33) for limiting are respectively provided on both sides of the displacement slide rail (32), and a damping spring (34) is provided between the two fixed side plates (33) on the same side. The angle of the end of the displacement slide rail (32) can be changed in the angle deformation displacement bin (31).

8. The composite comb plate bridge expansion device with multi-directional adjustment function according to claim 6 is characterized in that: The angle deformation displacement bin (31) is provided with a sliding block (311), and lateral guide rails (312) are symmetrically provided in the middle of both sides of the sliding block (311). A displacement card slot (313) matching the lateral guide rail (312) is provided in the middle of the inner wall of the angle deformation displacement bin (31). The sliding block (311) can freely telescope and move in the angle deformation displacement bin (31) through the lateral guide rail (312) and the displacement card slot (313). A direction ball (321) is provided at the end of the displacement sliding rail (32). A ball hole bin (322) is provided on a side of the sliding block (311) close to the direction ball (321). The angle of the displacement sliding rail (32) can be freely adjusted in the sliding block (311) through the direction ball (321), and an elastic rubber layer is provided on the inner wall of the ball hole bin (322).

9. The composite comb plate bridge expansion device with multi-directional adjustment function according to claim 1 is characterized in that: A telescopic water-conducting sealing belt (4) is provided in the bridge expansion joint (12) in a direction perpendicular to the bridge centerline, and two sides of the telescopic water-conducting sealing belt (4) are respectively fixed to the surface of the reserved groove (11).

10. The composite comb plate bridge expansion device with multi-directional adjustment function according to claim 9, characterized in that: A pressure strip (41) is provided on the surface of the reserved groove (11), and the pressure strip (41) is fixed to the telescopic water-conducting sealing belt (4) via bolts (42).

Images