Novel multidirectional displacement bolt-free comb plate bridge expansion system and construction method

Abstract

The invention discloses a novel multi-directional displacement bolt-free comb plate bridge expansion system and a construction method. The system comprises a stop block arranged on the side face of a first beam body, a movable end toothed plate which spans an expansion joint and is rotatably arranged on the side face of the stop block, a sliding block arranged at the bottom of the tooth end of the movable end toothed plate, a fixed end embedded part arranged on a second beam body from bottom to top, a damping plate, a stainless steel sliding plate and a fixed end toothed plate. The fixed end toothed plate spans the expansion joint and is staggered with the movable end toothed plate to form comb tooth fit; the sliding block is vertically limited through a sliding groove in the bottom of the fixed end toothed plate, and vertical tooth warping and tooth skipping prevention of the telescopic system is achieved. The top of the sliding block slides on the arc-shaped face of a second arc-shaped groove in the lower surface of the tooth end of the movable end toothed plate. A rotating gap is reserved between the bottom of the movable end toothed plate and the stainless steel sliding plate, so that the vertical rotation of the bridge and good slope adaptation can be realized; the toothed plate can be quickly replaced, no bolt is arranged on the surface for assembly, and the driving safety problem caused by bolt loosening can be avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge engineering, and more specifically, relates to a novel multi-directional displacement boltless comb plate bridge telescopic system and a construction method. Background Art

[0002] At present, there are many types of bridge expansion systems used in bridge engineering. Modular and comb-tooth plate expansion systems are widely used in bridge engineering because of their wide applicable displacement range. Modular expansion systems are usually composed of multiple modules and can be adjusted according to the expansion and contraction of the bridge. Its advantages are good displacement performance and ability to adapt to larger displacements. However, its disadvantages are that driving comfort and post-maintenance may not be as good as comb-tooth plate expansion systems. Therefore, comb-tooth expansion systems have been widely used in recent years. Due to its structural characteristics, the comb-tooth plate expansion system provides better driving comfort and is suitable for a larger displacement range. However, after investigating the use of existing comb-tooth plate expansion systems, the comb-tooth plate expansion system mainly has problems such as warping of the driving surface, rusting of the tooth plate, loosening and shearing of the bolts, which affect the safety and comfort of driving; the expansion system relies on bolts for fixing, and the loosening, rusting or breaking of the bolts makes replacement difficult, increases the complexity of maintenance, and increases the cost of maintenance. Bridges are important transportation infrastructure. Replacing the telescopic system may require closing part or all of the traffic, which will cause serious traffic disruption during peak hours. Therefore, in order to reduce the defects of the comb-tooth telescopic system and improve driving comfort and safety, a new multi-directional displacement boltless comb-tooth plate bridge telescopic system is urgently needed. Summary of the invention

[0003] In view of the above defects or improvement needs of the prior art, the present invention provides a novel multi-directional displacement boltless comb plate bridge telescopic system and construction method, by arranging a sliding block at the bottom of the movable end tooth plate so that the sliding block can slide in the sliding groove at the bottom of the fixed end tooth plate, this design allows the telescopic system to be displaced in the vertical direction, thereby realizing the functions of preventing the movable end tooth plate and the fixed end tooth plate from warping and jumping teeth; by arranging a tensile limit block at the bottom of the tooth end of the fixed end tooth plate, and matching it with the tensile strip groove on the fixed end embedded part, the two form a vertical limit to achieve tensile resistance, the outer contour of the tensile limit block is matched with the inner contour of the steel section, and a through limit bolt hole is provided on the tensile limit block, through which the limit bolt passes The limiting bolt hole fixes the tensile limiting block to the anchor sleeve. This locking mechanism allows the fixed end tooth plate to remain stable when bearing load, so that the limiting bolt is not subjected to stress during use, which can solve the problem of bolt loosening that is prone to occur in the traditional comb plate telescopic system during use; by leaving a rotation gap between the bottom of the movable end tooth plate and the stainless steel slide plate, the bridge can rotate vertically to adapt to changes in the slope of the bridge; the tooth plate of the present invention can be quickly replaced, and the tooth plate surface is assembled without bolts, which can avoid driving safety problems caused by bolt loosening; it can adapt to the displacement of the bridge in different directions, including expansion and contraction caused by factors such as temperature changes and vehicle loads, while maintaining driving comfort and safety.

[0004] In order to achieve the above-mentioned object, one aspect of the present invention provides a novel multi-directional displacement boltless comb plate bridge expansion system, comprising a first expansion assembly arranged on a first beam body, and a second expansion assembly arranged on a second beam body; the first beam body and the second beam body are arranged at intervals to form an expansion joint; wherein,

[0005] The first telescopic assembly includes a stopper disposed on the side of the first beam body, a movable end tooth plate rotatably disposed on the side of the stopper across the expansion gap, and a sliding block disposed at the bottom of the tooth end of the movable end tooth plate; the second telescopic assembly includes a fixed end embedded part, a shock absorbing plate, a stainless steel slide plate, and a fixed end tooth plate disposed on the second beam body from bottom to top; the fixed end tooth plate is disposed across the expansion gap and is staggered with the movable end tooth plate to form a comb tooth match;

[0006] The fixed end embedded part includes an end wedge-shaped limit block embedded in the second beam body, and a steel section arranged parallel and spaced on the side of the end wedge-shaped limit block; the steel section is provided with a tensile strip groove; the tooth root of the fixed end tooth plate is adapted to the end wedge-shaped limit block, and the bottom of the tooth end is provided with a tensile limit block adapted to the tensile strip groove;

[0007] A sliding groove for the sliding block to slide is provided at the bottom of the fixed end tooth plate; the sliding groove is used to vertically limit the sliding block, so that the telescopic system can prevent tooth warping and tooth jumping in the vertical direction; a second arc-shaped groove is provided on the lower surface of the tooth end of the movable end tooth plate; the bottom of the sliding block contacts the stainless steel slide plate, and the top can slide on the arc surface of the second arc-shaped groove; a rotation gap is left between the bottom of the movable end tooth plate and the stainless steel slide plate, which can achieve good adaptability to the vertical rotation and slope of the bridge.

[0008] Furthermore, a shear nail is provided at the bottom of the stopper, and the shear nail is fixed to the concrete on the first beam body.

[0009] Furthermore, the movable end tooth plate is a simply supported hinged structure, which can realize free rotation in the longitudinal direction and transmit the vertical load to the first beam body;

[0010] An arc-shaped guide plate is provided below the tooth root of the movable end tooth plate; a first arc-shaped groove matching the arc of the arc-shaped guide plate is provided on the side of the stopper;

[0011] A rotating shaft is provided at the center of the arc-shaped guide plate;

[0012] The rotating shaft is installed on the rotating seat; the rotating seat is fixed to the embedded steel bars of the corresponding side beam body; the side of the rotating seat is provided with a lateral limit block fixed to the concrete on the first beam body; the limit bolt passes through the lateral limit block and is fixed to the rotating seat.

[0013] Furthermore, the sliding block comprises a bottom plate and an arc block arranged on the bottom plate; the arc block is provided with a first shaft hole;

[0014] When the second arc-shaped groove is set through the bottom of the tooth end of the movable end tooth plate, arc-shaped plates with the same shape and size as the second arc-shaped groove are provided at both ends of the second arc-shaped groove; and a second shaft hole corresponding to the position of the first shaft hole is provided on the arc-shaped plate;

[0015] The arc block is embedded in the second arc groove, adapted to and matched with the second arc groove, and the rotating shaft passes through the arc block and is fixed to the two arc plates as a whole to prevent the movable end tooth plate from vertically disengaging.

[0016] Furthermore, two ends of the bottom plate extend out of the two sides of the movable end tooth plate and extend into the bottom slide grooves of the fixed end tooth plates on both sides;

[0017] The bottom of the base plate is in contact with the stainless steel slide plate; the top of the base plate is flush with the bottom of the movable end tooth plate; the movable end tooth plate is raised by the base plate, so that a rotation gap is left between the movable end tooth plate and the stainless steel slide plate, which can well adapt to the vertical rotation and slope of the bridge.

[0018] Furthermore, the fixed end tooth plate includes a second tooth root and a plurality of second tooth plates arranged at intervals on the side of the second tooth root in a flat shape;

[0019] The slide groove is arranged at the bottom of the second tooth plate; the slide groove is arranged between the tensile limit block and the second tooth root; the non-slide groove area at the bottom of the fixed end tooth plate contacts the stainless steel slide plate.

[0020] Furthermore, the fixed end embedded part also includes a plurality of connecting ribs vertically arranged between the end wedge-shaped limit block and the profile steel;

[0021] A plurality of anchor bars are arranged in parallel and at intervals at the bottom of the end wedge-shaped limit block; a plurality of anchor sleeves are arranged vertically on one side of the steel section close to the end wedge-shaped limit block;

[0022] A wedge-shaped groove is provided inside the end wedge-shaped limit block; and the end of the second tooth root is a wedge-shaped surface matched with the wedge-shaped groove of the end wedge-shaped limit block.

[0023] Furthermore, the tensile limit block is arranged on the lower surface of each end of the second tooth plate; the tensile limit block is provided with a through limit bolt hole;

[0024] The outer contour of the tensile limit block is matched with the inner contour of the steel section, and the tensile limit block can realize self-locking inside the steel section; the limit bolt passes through the limit bolt hole to fix the tensile limit block and the anchor sleeve.

[0025] Furthermore, the movable end tooth plate comprises a first tooth root and a plurality of first tooth plates arranged at intervals on the side of the first tooth root; the upper surface of the tooth end of the first tooth plate is a wedge-shaped surface inclined toward the end;

[0026] The arc-shaped guide plate is arranged at the bottom of the first tooth root;

[0027] The top of the rotating seat is fixed to the first tooth root;

[0028] A sealing strip is provided between the stopper and the first tooth root.

[0029] The second aspect of the present invention provides a construction method of a novel multi-directional displacement boltless comb plate bridge telescopic system, which is implemented by applying the novel boltless comb plate bridge telescopic system that can be quickly replaced, and includes the following steps:

[0030] S1: Roughen the concrete groove areas on the two beams according to the design requirements; transport the processed stoppers, movable end tooth plates, sliding blocks, fixed end embedded parts, shock absorbing plates, stainless steel slide plates, and fixed end tooth plates to the construction site;

[0031] S2: Install the fixed end embedded parts in the roughened concrete groove area on one side of the beam; install the shear nails at the bottom of the block, install the block on the inner side of the roughened concrete groove area on the other side of the beam, and fix the rotating seat at the bottom;

[0032] S3: After the fixed end embedded parts, block, shear nails and rotating seat are fixed, the concrete pouring work is carried out to ensure that the newly poured concrete is firmly combined with the original concrete and the fixed end embedded parts, shear nails and rotating seat;

[0033] S4: After the strength of the concrete reaches 80%, a shock-absorbing plate is installed on the upper surface of the fixed end embedded part, and a stainless steel slide plate is installed on the upper surface of the shock-absorbing plate;

[0034] S5: Install the movable end tooth plate on the side of the stopper and the rotating seat, so that the arc-shaped guide plate of the movable end tooth plate matches with the first arc-shaped groove on the side of the stopper; the tooth end of the movable end tooth plate is arranged across the seam and the bottom of the sliding block on it fits with the stainless steel slide plate on the side where the fixed end embedded part is located; install the lateral limit block on the side of the rotating seat;

[0035] S6: Install the fixed end tooth plate on the stainless steel slide plate on the side where the fixed end embedded part is located, so that the second tooth root end of the fixed end tooth plate matches the internal contour of the end wedge-shaped limit block of the fixed end embedded part, and the bottom tensile limit block of the second tooth plate fits in the tensile strip groove on the steel section at the corresponding position to limit the vertical displacement of the fixed end tooth plate; by making the two ends of the sliding block located in the bottom sliding groove of the fixed end tooth plate, the sliding block is vertically limited to realize the vertical anti-warping and anti-jumping of the telescopic system;

[0036] S7: fixing the tensile limit block to the anchor sleeve on the fixed end embedded part by means of a limit bolt, thereby limiting the longitudinal displacement of the fixed end tooth plate;

[0037] S8: Install a sealing strip between the stopper and the first tooth root of the movable end tooth plate; after completing the installation of all components, waterproof the joints and clean the bridge deck, and conduct a comprehensive inspection to ensure that all components are correctly installed and fixed, and that the telescopic system can freely extend and retract without restriction.

[0038] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0039] The novel multi-directional displacement boltless comb plate bridge telescopic system of the present invention forms a comb-tooth structure through the staggered cooperation of the movable end tooth plate and the fixed end tooth plate, allowing the two beams to move in two directions; this design enables the telescopic system to adapt to the telescopic requirements of the bridge in the horizontal and vertical directions;

[0040] By arranging a sliding block at the bottom of the movable end tooth plate, the sliding block can slide in the sliding groove at the bottom of the fixed end tooth plate. This design allows the telescopic system to be displaced in the vertical direction, thereby realizing the function of preventing the movable end tooth plate and the fixed end tooth plate from warping and jumping teeth; by arranging a shock-absorbing plate and a stainless steel slide plate at the bottom of the sliding block, between the fixed end tooth plate and the fixed end embedded part, the stainless steel slide plate is used to reduce the resistance of the movable end tooth plate and the fixed end tooth plate when sliding, and the shock-absorbing plate is used to reduce the vertical stiffness of the movable end tooth plate and the fixed end tooth plate, thereby reducing the noise caused by the change of the steel plate from the asphalt pavement to the movable end tooth plate and the fixed end tooth plate during driving, and improving driving comfort; by arranging a tensile limit block at the bottom of the tooth end of the fixed end tooth plate, and matching it with the tensile strip groove on the fixed end embedded part, the two form a vertical limit to achieve tensile resistance, and the outer contour of the tensile limit block is matched with the inner contour of the steel section, and the tensile limit block A through-limiting bolt hole is provided on the upper part, and the tensile limit block is fixed to the anchor sleeve by passing the limit bolt through the limit bolt hole. This locking mechanism allows the fixed end tooth plate to remain stable when bearing load, so that the limit bolt is not subjected to force during use, and can solve the problem that the bolts of the traditional comb plate telescopic system are prone to loosening during use; by leaving a rotation gap between the bottom of the movable end tooth plate and the stainless steel slide plate, the bridge can be rotated in the vertical direction, so as to adapt to the slope change of the bridge; the impact of the movable end tooth plate and the fixed end tooth plate on the concrete pavement under the action of external load is reduced by the design of the end wedge-shaped limit block and the stopper; a shear nail is provided at the bottom of the stopper, and the shear nail is fixed to the concrete on the first beam body, and the horizontal force impact load is jointly borne by the stopper and the shear nail, so as to further reduce the force of the movable end tooth plate on the pavement layer, thereby protecting the integrity of the pavement layer structure. The present invention adopts the bolt-free assembly technology on the tooth plate surface, which can avoid the driving safety problem caused by the loosening of the bolts. Each component is a standardized component, and replacement is simple and quick; the new multi-directional displacement boltless comb plate bridge expansion system of the present invention can adapt to the displacement of the bridge in different directions, including expansion and contraction caused by factors such as temperature changes and vehicle loads, while maintaining driving comfort and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the overall structure of a novel multi-directional displacement boltless comb plate bridge telescopic system installed on a beam body according to an embodiment of the present invention;

[0042] Figure 2 This is a structural schematic diagram of a movable end tooth plate of a novel multi-directional displacement boltless comb plate bridge telescopic system according to an embodiment of the present invention;

[0043] Figure 3 This is a schematic structural diagram of a fixed end embedded part of a novel multi-directional displacement bolt-free comb plate bridge telescopic system according to an embodiment of the present invention;

[0044] Figure 4 This is a schematic structural diagram of a fixed end tooth plate of a novel multi-directional displacement bolt-free comb plate bridge telescopic system according to an embodiment of the present invention;

[0045] Figure 5 It is a schematic diagram of the longitudinal cross-sectional structure of a sliding block of a novel multi-directional displacement boltless comb plate bridge telescopic system according to an embodiment of the present invention;

[0046] Figure 6 It is a side structural schematic diagram of a sliding block of a novel multi-directional displacement boltless comb plate bridge telescopic system according to an embodiment of the present invention;

[0047] Figure 7 A three-dimensional structural schematic diagram of a novel multi-directional displacement boltless comb plate bridge telescopic system according to an embodiment of the present invention;

[0048] Figure 8 This is a schematic diagram of the three-dimensional structure of the end of a novel multi-directional displacement boltless comb plate bridge telescopic system according to an embodiment of the present invention;

[0049] Fig. 9 The present invention is a flowchart of a construction method of a novel multi-directional displacement boltless comb plate bridge telescopic system according to an embodiment of the present invention.

[0050] In all the drawings, the same reference numerals represent the same technical features, specifically: 1-block, 2-shear nail, 3-movable end tooth plate, 31-first tooth root, 32-first tooth plate, 321-arc plate, 322-rotating shaft, 323-sliding block, 3231-bottom plate, 3232-arc block, 3233-first shaft hole, 33-lateral limit block, 34-sealing strip, 35-arc guide plate, 351-rotating shaft, 352-rotating seat, 4-fixed end embedded part, 41-end wedge limit block, 42-steel, 421-tensile strip groove, 43-connecting rib plate, 44-anchor rib, 45-anchor sleeve, 5-fixed end tooth plate, 51-second tooth root, 52-second tooth plate, 53-tensile limit block, 6-stainless steel slide plate, 7-shock absorber plate, 8-limit bolt. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0052] like Figure 1-Figure 8As shown, one aspect of the present invention provides a novel multi-directional displacement boltless comb plate bridge telescopic system, comprising a first beam, a second beam, a first telescopic assembly arranged on the first beam, and a second telescopic assembly arranged on the second beam; the first beam and the second beam are arranged at intervals to form an expansion joint; the first telescopic assembly comprises a stopper 1 arranged on the side of the first beam, a movable end tooth plate 3 rotatably arranged on the side of the stopper 1 across the expansion joint, and a sliding block 323 arranged at the bottom of the tooth end of the movable end tooth plate 3; the second telescopic assembly comprises a fixed end embedded part 4, a shock absorbing plate 6, a stainless steel slide plate 7, a fixed end Tooth plate 5; the fixed end tooth plate 5 is arranged across the expansion joint, and is staggered with the movable end tooth plate 3 to form a comb tooth match, which can adapt to the temperature displacement of the beam body and withstand the vehicle load; the fixed end embedded part 4 includes an end wedge-shaped limit block 41 embedded in the second beam body, and a steel section 42 arranged in parallel and spaced on the side of the end wedge-shaped limit block 41; the steel section 42 is provided with a tensile strip groove 421; the bottom of the tooth end of the fixed end tooth plate 5 is provided with a tensile limit block 53 adapted to the tensile strip groove 421; the tensile limit block 53 is fixed to the steel section 42 by a limit bolt 8, thereby realizing the fixed end embedded part 4 and The fixed end tooth plate 5 is locked; a slide groove 521 is provided at the bottom of the fixed end tooth plate 5 for the sliding block 323 to slide; the sliding groove is used to vertically limit the sliding block 323, so as to realize the vertical anti-warping and anti-jumping of the telescopic system; a second arc-shaped groove is provided on the lower surface of the tooth end of the movable end tooth plate 3; the bottom of the sliding block 323 contacts the stainless steel slide plate 7, and the top can slide on the arc surface of the second arc-shaped groove; a rotation gap is left between the bottom of the movable end tooth plate 3 and the stainless steel slide plate 7, so as to realize the good adaptation of the vertical rotation and slope of the bridge; by A stopper 1 and an end wedge-shaped limit block 41 are respectively arranged at the layer to reduce the impact of the movable end tooth plate 3 and the fixed end tooth plate 5 on the concrete pavement under the action of external load; a shear nail 2 is arranged at the bottom of the stopper 1, and the shear nail 2 is fixed to the concrete on the first beam body, and can withstand the force in the horizontal direction, while allowing the telescopic system to move in the horizontal direction; the stopper 1 and the shear nail 2 jointly withstand the horizontal force impact load, which can further reduce the force of the movable end tooth plate 3 on the pavement layer, thereby protecting the integrity of the pavement layer structure; the use of bolt-free assembly technology on the tooth plate surface can avoid driving safety problems caused by loose bolts.

[0053] Furthermore, if Figure 1-Figure 8As shown, the rotation mechanism of the movable end tooth plate 3 is the key part to realize longitudinal free rotation and transfer load to the first beam body; specifically, an arc-shaped guide plate 35 is provided under the tooth root of the movable end tooth plate 3, which plays a guiding and supporting role and allows the movable end tooth plate to rotate within a certain range; a rotation axis 351 is provided at the center of the arc-shaped guide plate 35; the rotation axis 351 is installed on a rotation seat 352; the rotation seat 322 is fixed to the embedded steel bars of the corresponding side beam body to ensure that the tooth plate can rotate freely around the rotation axis 351; a first arc-shaped groove is provided on the side of the stopper 1 to match the curvature of the arc-shaped guide plate 35 to ensure that the movable end tooth plate 3 has smooth contact with the stopper 1 when rotating; the first arc-shaped groove is connected with the arc-shaped guide plate 35 and the rotation axis The center of the circle of the movable end tooth plate 351 is concentric, ensuring that the movable end tooth plate 3 remains stable during rotation, reducing friction and wear; the movable end tooth plate 3 is a simply supported hinged structure, which can realize the free rotation of the movable end tooth plate 3 in the longitudinal direction and transfer the vertical load of the movable end tooth plate 3 to the first beam body; the side of the rotating seat 322 is provided with a lateral limit block 33 fixed to the concrete on the first beam body to limit the lateral displacement of the movable end tooth plate 3; the lateral limit block 33 is fixed to the rotating seat 322 by the limit bolt 8, thereby locking the rotating shaft 351, limiting the longitudinal and vertical displacement of the rotating shaft 351, and thus locking the position of the movable end tooth plate 3; the movable end tooth plate 3 can rotate freely in the longitudinal direction while maintaining the connection with the first beam body to ensure the effective transmission of the load. The use of the lateral limit block 33 and the limit bolt 8 ensures the stability of the movable end tooth plate 3 during rotation, prevents unnecessary displacement, and thus improves the overall performance of the telescopic device and the driving safety of the bridge.

[0054] Furthermore, if Figure 1-Figure 8As shown, the coordinated design of the sliding block 323 and the movable end tooth plate 3 is a key mechanism for realizing the free rotation and displacement of the bridge telescopic device in the vertical direction; specifically, the sliding block 323 includes a bottom plate 3231 and an arc block 3232 arranged on the bottom plate 3231; the arc block 3232 is provided with a first axial hole 3233; the second arc groove at the bottom of the movable end tooth plate 3 can be set through, or can be arranged in a central groove; when the second arc groove is set through at the bottom of the tooth end of the movable end tooth plate 3, arc plates 321 with the same shape and size as the second arc groove are provided at both ends of the second arc groove; a second axial hole corresponding to the position of the first axial hole 3233 is provided on the arc plate 321; the arc plate 321 and the movable end tooth plate 3 are welded as a whole; the bottom of the arc plate 321 and the movable end tooth plate 3 The bottom is flush; the arc block 3232 is embedded in the second arc groove, adapted to and matched with the second arc groove, and the rotating shaft 322 passes through the arc block 3232 and is fixed as a whole with the two arc plates 321; when the second arc groove is arranged in the center of the bottom of the movable end tooth plate 3, the two ends of the second arc groove are closed, and a third axis hole corresponding to the position of the first axis hole 3233 is provided on it; the arc block 3232 is embedded in the second arc groove, adapted to and matched with the second arc groove, and the rotating shaft 322 passes through the arc block 3232 and is fixed as a whole with the side surface of the movable end tooth plate 3; the tooth end of the movable end tooth plate 3 and the sliding block 323 can rotate along the arc surface of the second arc groove, and the movable end tooth plate 3 is connected to the sliding block 323 by the rotating shaft 322 to prevent the movable end tooth plate 3 from vertically disengaging;

[0055] Furthermore, if Figure 1-Figure 8 As shown, the two ends of the bottom plate 3231 of the sliding block 323 extend out of the two sides of the movable end tooth plate 3 and extend into the bottom slide grooves 521 of the fixed end tooth plates 5 on both sides; the bottom of the bottom plate 3231 contacts the stainless steel slide plate 7; this helps the sliding block 323 to move smoothly when the beam body is extended or retracted, reducing friction; the top of the bottom plate 3231 is flush with the bottom of the movable end tooth plate 3; the area of ​​the bottom of the fixed end tooth plate 5 where the slide groove 521 is not located contacts the stainless steel slide plate 7, which helps the fixed end tooth plate 5 to remain stable and allows the sliding block 323 to move smoothly when the beam body is extended or retracted. The sliding block 323 moves in the slide groove 521; when the first beam and the second beam move closer or farther in the driving state, the sliding block 323 can slide in the slide groove 521 along the expansion and contraction direction of the beam; the movable end tooth plate 3 is raised by the bottom plate 3231, so that there is a rotation gap between the movable end tooth plate 3 and the stainless steel slide plate 7, allowing the bridge to rotate vertically to adapt to different slope changes; through the cooperation of the sliding block 323 and the slide groove 521, the telescopic device can rotate and move freely in the vertical direction, while maintaining the stability and reliability of the structure. This helps to reduce the wear of the bridge telescopic device, improve its durability, and ensure the comfort and safety of driving.

[0056] Furthermore, if Figure 1-Figure 8 As shown, the movable end tooth plate 3 includes a first tooth root 31 and a plurality of first tooth plates 32 arranged at flat intervals on the side of the first tooth root 31; the fixed end tooth plate 5 includes a second tooth root 51 and a plurality of second tooth plates 52 arranged at flat intervals on the side of the second tooth root 51; the arc guide plate 35 is arranged at the bottom of the first tooth root 31; the top of the rotating seat 322 is fixed to the first tooth root 31; the upper surface of the tooth end of the first tooth plate 32 is a wedge-shaped surface inclined toward the end, and the slide groove 521 is arranged at the bottom of the second tooth plate 52; the slide groove 521 is arranged between the tensile limit block 53 and the second tooth root 51; the area of ​​the bottom of the second tooth plate 52 where the slide groove 521 is not located is in contact with the stainless steel slide plate 7; in the driving state, when the first beam body and the second beam body move relatively close to or away from each other, the sliding block 323 can slide in the slide groove 521 along the telescopic direction of the beam body.

[0057] Furthermore, if Figure 1-Figure 8 As shown, the second arc-shaped groove is arranged on the lower surface of the tooth end of the first tooth plate 32; when the second arc-shaped groove is set through the bottom of the tooth end of the movable end tooth plate 3, the arc plate 321 is respectively set at both ends of the second arc-shaped groove, and the first tooth plate 32 and the two arc plates 321 are welded to form a whole; the first tooth plate 32 and the sliding block 323 can rotate along the arc surface of the arc block 3232, and the first tooth plate 32 and the sliding block 323 are fixed by the rotating shaft 322 to prevent the first tooth plate 32 from vertically disengaging; the two ends of the bottom plate 3231 of the sliding block 323 extend to the outside of both sides of the first tooth plate 32, and extend into the bottom sliding groove 521 of the second tooth plate 52 on both sides; the first tooth plate 32 is lifted by the bottom plate 3231, so that a rotation gap is left between the first tooth plate 32 and the stainless steel slide plate 7, which can well adapt to the vertical rotation and slope of the bridge.

[0058] Furthermore, if Figure 1-Figure 8As shown, the design of the tensile limit block 53 and the end wedge-shaped limit block 41 of the fixed end tooth plate 5 is the key part to achieve the stability and tensile resistance of the fixed end tooth plate 5 in the vertical direction; the tensile limit block 53 is arranged on the lower surface of each end of the second tooth plate 52; the end wedge-shaped limit block 41 is provided with a wedge-shaped groove inside; the end of the second tooth root 51 is a wedge-shaped surface adapted to the wedge-shaped groove of the end wedge-shaped limit block 41, and the engagement of the two can limit the vertical displacement of the fixed end tooth plate 5; after the fixed end tooth plate 5 is installed on the fixed end embedded part 4, The tensile limit block 53 is embedded in the tensile strip groove 421, and the two form a vertical limit to achieve tensile resistance; the tensile limit block 53 is provided with a through limit bolt hole 531; the tensile limit block 53 is fixed to the anchor sleeve 45 by passing the limit bolt 8 through the limit bolt hole 531, thereby achieving locking of the fixed end tooth plate 5 and the fixed end embedded part 4; the fixed end tooth plate 5 can not only resist the force in the vertical direction, but also form a stable connection with the fixed end embedded part 4, thereby improving the stability and durability of the entire bridge expansion device.

[0059] Furthermore, if Figure 1-Figure 8 As shown, the tensile strip groove 421 includes a first strip groove arranged on the side of the steel section 42 and a second strip groove arranged on the top surface of the steel section 42; the first strip groove and the second strip groove are connected to each other to form a continuous space; the outer contour of the tensile limit block 53 is adapted to the inner contour of the steel section 42. After the fixed end tooth plate 5 is in place, the tensile limit block 53 is fixed to the anchor sleeve 45 by passing the limit bolt 8 through the limit bolt hole 531. By making the outer contour of the tensile limit block 53 adapted to the inner contour of the steel section 42, the tensile limit block 53 is self-locking inside the steel section 42. Under normal use conditions, the tensile limit block 53 will not be displaced, thereby avoiding the problem of bolt loosening. At the same time, the limit bolt 8 is not subjected to force during use, reducing the risk of loosening or breakage that may occur due to the force on the bolt, and can solve the safety hazards and maintenance problems caused by bolt loosening that are prone to occur in the traditional comb plate telescopic system during normal use.

[0060] Furthermore, if Figure 1-Figure 8 As shown, the fixed end embedded part 4 also includes a plurality of connecting ribs 43 vertically arranged between the end wedge-shaped limit block 41 and the steel section 42; a plurality of anchor bars 44 are arranged at intervals and in parallel at the bottom of the end wedge-shaped limit block 41; the anchor bars 44 are rectangular ring-shaped steel bars with an open top; a plurality of anchor sleeves 45 are vertically arranged on one side of the steel section 42 close to the end wedge-shaped limit block 41; the various components are connected into a whole by welding, and the overall rigidity is good.

[0061] Furthermore, if Figure 1-Figure 8As shown, a sealing strip 34 is provided between the stopper 1 and the first tooth root 31 to seal the rotation gap between the stopper 1 and the first tooth root 31 to prevent impurities such as sand and stones from entering the rotation gap and affecting the rotation of the tooth plate.

[0062] Furthermore, if Figure 1-Figure 8 As shown, L-shaped grooves are respectively provided on one side of the two beams close to each other; the first telescopic assembly and the second telescopic assembly are respectively arranged in the corresponding L-shaped grooves; the shock-absorbing plate 6 is arranged on the embedded anchor assembly 1 after the concrete is poured; the overall bearing performance of the present invention is good and the installation and maintenance are convenient; the fixed end embedded part 4 is an integral welded structure, the relative position accuracy between the components is high, and the overall rigidity is good; the fixed end embedded part 4 can be embedded as a whole during installation, and its top surface can also be used as a reference surface for pouring concrete, which is convenient and quick to install; the fixed end embedded part 4 and the fixed end tooth plate 5 are fixed with limit bolts 8, and the fixing effect is good; there are no bolts on the surfaces of the movable end tooth plate 3 and the fixed end tooth plate 5, and the driving performance is comfortable.

[0063] Furthermore, if Figure 1-Figure 8 As shown, the shock absorbing plate 6 is entirely covered on the upper surface of the fixed end embedded part 4; the stainless steel slide plate 7 is covered on the shock absorbing plate 6; the shock absorbing plate 6 and the stainless steel slide plate 7 are provided with a semicircular hole 71 avoiding the tensile limit block 53 and the tensile strip groove 421; the stainless steel slide plate 7 can reduce the resistance of the movable end tooth plate 3 and the fixed end tooth plate 5 during sliding, thereby improving the durability of the product; the shock absorbing plate 6 can reduce the vertical stiffness of the movable end tooth plate 3 and the fixed end tooth plate 5, reduce the noise caused by the change of the steel plate from the asphalt pavement to the movable end tooth plate 3 and the fixed end tooth plate 5 during driving, and improve driving comfort.

[0064] The movable end tooth plate 3, the fixed end tooth plate 5 and the fixed end embedded part 4 of the present invention are arranged separately, and each component works independently to reduce mutual interference; the movable end tooth plate 3 and the fixed end tooth plate 5 can be quickly replaced, which greatly reduces maintenance time and cost. When the components are damaged or worn, they can be quickly replaced without dismantling the entire telescopic device; the anti-warping and anti-jumping functions of the movable end tooth plate 3 and the fixed end tooth plate 5 are realized by the cooperation of the sliding block 323 and the second arc-shaped groove, and the self-locking mechanism of the tensile limit block 53 and the tensile strip groove 421, thereby ensuring the stability of the telescopic device when the vehicle passes.

[0065] like Fig. 9 As shown, another aspect of the present invention provides a construction method of a novel multi-directional displacement boltless comb plate bridge telescopic system, which is implemented by applying the novel multi-directional displacement boltless comb plate bridge telescopic system, and includes the following steps:

[0066] S1: roughen the concrete groove areas on the two beams according to the design requirements; transport the processed stopper 1, movable end tooth plate 3, sliding block 323, fixed end embedded part 4, shock absorbing plate 6, stainless steel slide plate 7, fixed end tooth plate 5 to the construction site; wherein,

[0067] The processing of the stopper 1 includes opening a first arc-shaped groove on the side of the stopper 1 according to design requirements;

[0068] The processing of the movable end tooth plate 3 includes providing an arc-shaped guide plate 35 concentric with the first arc-shaped groove at the bottom of the first tooth root 31 according to the design requirements, opening a second arc-shaped groove at the bottom of each first tooth plate 32, and rotatably installing a sliding block 323 in the second arc-shaped groove; making the two ends of the sliding block 323 extend out of the first tooth plate 32;

[0069] The processing of the fixed end embedded part 4 includes processing the end wedge-shaped limit block 41 and the steel 42, and then setting a wedge-shaped groove inside the end wedge-shaped limit block 41; processing the tensile strip groove 421 on the steel 42; installing a connecting rib plate 43 between the end wedge-shaped limit block 41 and the steel 42, and providing a plurality of anchor ribs 44 at intervals and in parallel at the bottom of the end wedge-shaped limit block 41; and vertically providing a plurality of anchor sleeves 45 on one side of the steel 42 close to the end wedge-shaped limit block 41;

[0070] The processing of the fixed end tooth plate 5 includes setting the end of the second tooth root 51 to a wedge-shaped surface adapted to the end wedge-shaped limit block 41 according to the design requirements, setting a tensile limit block 53 adapted to the tensile strip groove 421 at the bottom of the second tooth plate 52; setting a through limit bolt hole 531 on the tensile limit block 53; setting a sliding groove 521 for the sliding block 323 to slide between the tensile limit block 53 at the bottom of the second tooth plate 52 and the second tooth root 51;

[0071] The processing of the stainless steel slide plate 7 includes processing a semicircular hole 71 on the stainless steel slide plate 7 to avoid the tensile limit block 53 and the tensile strip groove 421;

[0072] The processing of the damping plate 6 includes processing a semicircular hole 71 on the damping plate 6 to avoid the tensile limit block 53 and the tensile strip groove 421;

[0073] S2: Install the fixed end embedded part 4 in the roughened concrete groove area on one side of the beam body, ensuring that the fixed end embedded part 4 is tightly fitted with the concrete surface of the groove area; install the shear nail 2 at the bottom of the stopper 1, and install the stopper 1 on the inner side of the roughened concrete groove area on the other side of the beam body, and fix the rotating seat 322 at the bottom; make the top of the stopper 1 flush with the upper surface of the beam body; wherein, the installation of the fixed end embedded part 4 includes the installation of the end wedge-shaped limit block 41 and the matching steel 42 in place;

[0074] S3: After the fixed end embedded part 4, the block 1, the shear pin 2, and the rotating seat 322 are fixed, the concrete pouring work is carried out to ensure that the newly poured concrete is firmly combined with the original concrete and the fixed end embedded part 4, the shear pin 2, and the rotating seat 322;

[0075] S4: After the strength of the concrete reaches 80%, a shock absorbing plate 6 is installed on the upper surface of the fixed end embedded part 4, and a stainless steel slide plate 7 is installed on the upper surface of the shock absorbing plate 6;

[0076] S5: Install the movable end tooth plate 3 on the side of the stopper 1 and the rotating seat 322, so that the arc-shaped guide plate 35 of the movable end tooth plate 3 cooperates with the first arc-shaped groove on the side of the stopper 1; the tooth end of the movable end tooth plate 3 is arranged across the gap and the bottom of the sliding block 323 on it fits with the stainless steel slide plate 7 on the side where the fixed end embedded part 4 is located; install the lateral limit block 33 on the side of the rotating seat 322, and fix the lateral limit block 33 to the rotating seat 322 by the limit bolt 8;

[0077] S6: Install the fixed end tooth plate 5 on the stainless steel slide plate 7 on the side where the fixed end embedded part 4 is located, so that the end of the second tooth root 51 of the fixed end tooth plate 5 matches the internal contour of the end wedge-shaped limit block 41 of the fixed end embedded part 4, and the tensile limit block 53 at the bottom of the second tooth plate 52 passes through the oblong hole 71 at the corresponding position and fits into the tensile strip groove 421 on the steel section 42 at the corresponding position to limit the vertical displacement of the fixed end tooth plate 5; by making the two ends of the sliding block 323 located in the bottom slide groove 521 of the fixed end tooth plate 5, the sliding block 323 is vertically limited, so as to realize the vertical anti-warping and anti-tooth jumping of the telescopic system;

[0078] S7: Fix the tensile limit block 53 to the anchor sleeve 45 on the fixed end embedded part 4 by passing the limit bolt 8 through the limit bolt hole 531 on the tensile limit block 53, thereby limiting the longitudinal displacement of the fixed end tooth plate 5;

[0079] S8: Install a sealing strip 34 between the stopper 1 and the first tooth root 31 of the movable end tooth plate 3; after completing the installation of all components, waterproof the joints and clean the bridge deck, and conduct a comprehensive inspection to ensure that all components are correctly installed and fixed, and that the telescopic system can freely extend and retract without restriction.

[0080] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of multi-directional displacement boltless comb plate bridge telescopic system, characterized by: It includes a first telescopic assembly arranged on a first beam body, and a second telescopic assembly arranged on a second beam body; the first beam body and the second beam body are arranged at intervals to form an expansion joint; wherein, The first telescopic assembly comprises a stopper (1) arranged on the side of the first beam body, a movable end tooth plate (3) rotatably arranged on the side of the stopper (1) across the expansion joint, and a sliding block (323) arranged at the bottom of the tooth end of the movable end tooth plate (3); the second telescopic assembly comprises a fixed end embedded part (4), a shock absorbing plate (6), a stainless steel slide plate (7), and a fixed end tooth plate (5) arranged on the second beam body from bottom to top; the fixed end tooth plate (5) is arranged across the expansion joint and is staggered with the movable end tooth plate (3) to form a comb tooth match; The fixed end embedded part (4) comprises an end wedge-shaped limit block (41) embedded in the second beam body, and a steel section (42) arranged parallel and spaced on the side of the end wedge-shaped limit block (41); the steel section (42) is provided with a tensile strip groove (421); the tooth root of the fixed end tooth plate (5) is matched with the end wedge-shaped limit block (41), and the bottom of the tooth end is provided with a tensile limit block (53) matched with the tensile strip groove (421); The bottom of the fixed end tooth plate (5) is provided with a slide groove (521) for the sliding block (323) to slide; the sliding block (323) is vertically limited by the slide groove (521) to realize the vertical anti-warping and anti-jumping of the telescopic system; the lower surface of the tooth end of the movable end tooth plate (3) is provided with a second arc-shaped groove; the bottom of the sliding block (323) is in contact with the stainless steel slide plate (7), and the top can slide on the arc surface of the second arc-shaped groove; a rotation gap is left between the bottom of the movable end tooth plate (3) and the stainless steel slide plate (7), which can achieve good adaptation to the vertical rotation and slope of the bridge.

2. According to claim 1, the novel multi-directional displacement boltless comb plate bridge telescopic system is characterized by: A shear nail (2) is provided at the bottom of the stopper (1), and the shear nail (2) is fixed to the concrete on the first beam body.

3. According to claim 2, the novel multi-directional displacement boltless comb plate bridge telescopic system is characterized by: The movable end tooth plate (3) is a simply supported hinged structure, which can realize free rotation in the longitudinal direction and transmit the vertical load to the first beam body; An arc-shaped guide plate (35) is provided below the tooth root of the movable end tooth plate (3); a first arc-shaped groove matching the arc of the arc-shaped guide plate (35) is provided on the side surface of the stopper (1); A rotating shaft (351) is provided at the center of the arc-shaped guide plate (35); The rotating shaft (351) is mounted on a rotating seat (352); the rotating seat (322) is fixed to the embedded steel bars of the corresponding side beam body; a lateral limit block (33) fixed to the concrete on the first beam body is provided on the side of the rotating seat (322); a limit bolt (8) passes through the lateral limit block (33) and is fixed to the rotating seat (322).

4. A novel multi-directional displacement boltless comb plate bridge telescopic system according to any one of claims 1 to 3, characterized in that: The sliding block (323) comprises a bottom plate (3231) and an arc-shaped block (3232) arranged on the bottom plate (3231); the arc-shaped block (3232) is provided with a first shaft hole (3233); When the second arc-shaped groove is provided through the bottom of the tooth end of the movable end tooth plate (3), arc-shaped plates (321) having the same shape and size as the second arc-shaped groove are provided at both ends of the second arc-shaped groove; and a second axial hole corresponding to the position of the first axial hole (3233) is provided on the arc-shaped plate (321); The arc block (3232) is embedded in the second arc groove, adapted to and matched with the second arc groove, and the rotating shaft (322) passes through the arc block (3232) and is fixed to the two arc plates (321) as a whole, thereby preventing the movable end gear plate (3) from vertically disengaging.

5. According to claim 4, the novel multi-directional displacement boltless comb plate bridge telescopic system is characterized by: The two ends of the bottom plate (3231) extend out of the two sides of the movable end tooth plate (3) and extend into the bottom sliding grooves (521) of the fixed end tooth plates (5) on both sides; The bottom of the bottom plate (3231) is in contact with the stainless steel slide plate (7); the top of the bottom plate (3231) is flush with the bottom of the movable end tooth plate (3); the movable end tooth plate (3) is raised by the bottom plate (3231), so that a rotation gap is left between the movable end tooth plate (3) and the stainless steel slide plate (7), which can well adapt to the vertical rotation and slope of the bridge.

6. A novel multi-directional displacement boltless comb plate bridge telescopic system according to any one of claims 1 to 3 or 5, characterized in that: The fixed end tooth plate (5) comprises a second tooth root (51) and a plurality of second tooth plates (52) arranged in a flat shape and spaced apart on the side of the second tooth root (51); The slide groove (521) is arranged at the bottom of the second tooth plate (52); the slide groove (521) is arranged between the tensile limit block (53) and the second tooth root (51); the area of ​​the bottom of the fixed end tooth plate (5) where the slide groove (521) is not located is in contact with the stainless steel slide plate (7).

7. A novel multi-directional displacement boltless comb plate bridge telescopic system according to any one of claims 1 to 3 or 5, characterized in that: The fixed end embedded part (4) further comprises a plurality of connecting ribs (43) vertically arranged between the end wedge-shaped limit block (41) and the profile steel (42); A plurality of anchor bars (44) are arranged in parallel and at intervals at the bottom of the end wedge-shaped stop block (41); a plurality of anchor sleeves (45) are arranged vertically on one side of the profile steel (42) close to the end wedge-shaped stop block (41); A wedge-shaped groove is provided inside the end wedge-shaped limit block (41); and the end of the second tooth root (51) is a wedge-shaped surface adapted to the wedge-shaped groove of the end wedge-shaped limit block (41).

8. According to claim 7, the novel multi-directional displacement boltless comb plate bridge telescopic system is characterized by: The tensile limit block (53) is arranged on the lower surface of the end of each second tooth plate (52); the tensile limit block (53) is provided with a through limit bolt hole (531); The outer contour of the tensile limit block (53) is compatible with the inner contour of the steel section (42), and the tensile limit block (53) can be self-locking inside the steel section (42); the limit bolt (8) passes through the limit bolt hole (531) to fix the tensile limit block (53) and the anchor sleeve (45).

9. According to claim 3, the novel multi-directional displacement boltless comb plate bridge telescopic system is characterized by: The movable end tooth plate (3) comprises a first tooth root (31) and a plurality of first tooth plates (32) arranged in a flat shape and spaced apart on the side of the first tooth root (31); the upper surface of the tooth end of the first tooth plate (32) is a wedge-shaped surface inclined toward the end; The arc-shaped guide plate (35) is arranged at the bottom of the first tooth root (31); The top of the rotating seat (322) is fixed to the first tooth root (31); A sealing strip (34) is provided between the stopper (1) and the first tooth root (31).

10. A new construction method for a multi-directional displacement boltless comb plate bridge telescopic system, characterized in that: The novel multi-directional displacement boltless comb plate bridge expansion system according to any one of claims 1 to 9 is implemented, comprising the following steps: S1: roughening the concrete groove areas on the two beam bodies according to the design requirements; transporting the processed stopper (1), the movable end tooth plate (3), the sliding block (323), the fixed end embedded part (4), the shock absorbing plate (6), the stainless steel slide plate (7), and the fixed end tooth plate (5) to the construction site; S2: Install the fixed end embedded part (4) in the roughened concrete groove area on one side of the beam body; install the shear nail (2) at the bottom of the stopper (1), install the stopper (1) on the inner side of the roughened concrete groove area on the other side of the beam body, and fix the rotating seat (322) at the bottom; S3: After the fixed end embedded part (4), the stopper (1), the shear pin (2), and the rotating seat (322) are fixed, the concrete pouring work is carried out to ensure that the newly poured concrete is firmly bonded with the original concrete and the fixed end embedded part (4), the shear pin (2), and the rotating seat (322); S4: After the strength of the concrete reaches 80%, a shock absorbing plate (6) is installed on the upper surface of the fixed end embedded part (4), and a stainless steel slide plate (7) is installed on the upper surface of the shock absorbing plate (6); S5: Install the movable end tooth plate (3) on the side of the stopper (1) and the rotating seat (322), so that the arc-shaped guide plate (35) of the movable end tooth plate (3) cooperates with the first arc-shaped groove on the side of the stopper (1); the tooth end of the movable end tooth plate (3) is arranged across the gap and the bottom of the sliding block (323) thereon is in contact with the stainless steel slide plate (7) on the side where the fixed end embedded part (4) is located; install the lateral limit block (33) on the side of the rotating seat (322); S6: Install the fixed end tooth plate (5) on the stainless steel slide plate (7) on the side where the fixed end embedded part (4) is located, so that the end of the second tooth root (51) of the fixed end tooth plate (5) matches the internal contour of the end wedge-shaped limit block (41) of the fixed end embedded part (4), and the bottom tensile limit block (53) of the second tooth plate (52) fits in place in the tensile strip groove (421) on the steel section (42) at the corresponding position to limit the vertical displacement of the fixed end tooth plate (5); by making the two ends of the sliding block (323) located in the bottom sliding groove (521) of the fixed end tooth plate (5), the sliding block (323) is vertically limited, so as to realize the vertical anti-warping and anti-jumping of the telescopic system; S7: fixing the tensile limit block (53) to the anchor sleeve (45) on the fixed end embedded part (4) by means of a limit bolt (8), thereby limiting the longitudinal displacement of the fixed end tooth plate (5); S8: Install a sealing strip (34) between the stopper (1) and the first tooth root (31) of the movable end tooth plate (3); after all components are installed, waterproof the joints and clean the bridge deck, and conduct a comprehensive inspection to ensure that all components are correctly installed and fixed, and that the telescopic system can freely extend and retract without restriction.

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