A highway bridge expansion joint structure and maintenance and reinforcement construction method
By designing a highway bridge expansion joint structure with a flip-flop structure, the performance degradation caused by traditional expansion joints is solved, and a longer service life and lower maintenance costs are achieved.
Patent Information
- Application Number
- CN202510159300.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2025-04-04
AI Technical Summary
In long-term use, traditional highway bridge expansion joints are likely to degrade their expansion performance due to gravel accumulation, which increases maintenance costs and safety hazards.
A highway bridge expansion joint structure is designed, using a flip-flop structure, with trigger and stone accumulation part inside the flip-flop. When the vehicle rolls, the flip-flop is flipped to discharge the gravel in the stone accumulation area and reduce the impact of gravel on the expansion joint.
It effectively reduces the impact of gravel on expansion joints, extends the service life of expansion joints, and reduces maintenance costs and safety risks.
Smart Images
Figure CN119754153A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of road and bridge structures, and in particular to a highway bridge expansion joint structure and a maintenance and reinforcement construction method. Background Art
[0002] Highway bridge expansion joints are an important part of modern transportation infrastructure. Their main function is to allow free displacement between bridge decks under the influence of factors such as temperature changes and vehicle loads, thereby ensuring the safety and durability of the bridge.
[0003] Although the traditional expansion joint design can meet basic functional requirements, it will face some problems during long-term use. For example, the accumulation of gravel will lead to a decrease in expansion performance, which in turn will cause fatigue and wear of the bridge structure, increase maintenance costs and safety hazards.
[0004] For example, during the process of thermal expansion and contraction, when the reserved gap becomes larger, the accumulated gravel will sink and spread out; when the reserved gap becomes smaller, the accumulated gravel cannot automatically reset itself, thereby continuously exerting stress on the road base on both sides. In the subsequent service process, fatigue and wear of the expansion joints are likely to occur with the vibration of vehicle rolling, resulting in the need for frequent maintenance and reinforcement of the expansion joints. Especially when vehicles pass frequently, the gravel will be continuously compacted, further aggravating the functional degradation of the expansion joints, so it needs to be improved. Summary of the invention
[0005] In order to reduce the impact of gravel on expansion joints, the present application provides a highway bridge expansion joint structure and a maintenance and reinforcement construction method.
[0006] In the first aspect, the present application provides a highway bridge expansion joint structure adopting the following technical solution: A highway bridge expansion joint structure comprises a reserved joint between two road basic bodies, both of the two road basic bodies are provided with an installation groove, the installation groove is communicated with the reserved joint, a flap is rotatably arranged in the installation groove, the flap comprises a triggering part and a stone accumulation part respectively located on both sides of the rotational connection between the flap and the installation groove, the end of the triggering part extends out of the top opening of the installation groove, the stone accumulation part extends into the reserved joint, the installation groove has a supporting surface for the bottom of the flap to abut, a plurality of flaps on the two road basic bodies are staggered with each other, and a V-shaped stone accumulation area is formed above the staggered part of the plurality of flaps, and the stone accumulation area is located inside the reserved joint.
[0007] By adopting the above technical solution, the design of the flap can effectively reduce the large-sized gravel from entering the bottom of the reserved joint and protect the expansion joint from damage. Specifically, in the initial state, the trigger part partially extends out of the installation slot, and the stone accumulation part extends downwardly to the inside of the reserved joint. When the gravel falls into the reserved joint, it will be temporarily stored in the stone accumulation area formed by multiple staggered flaps, reducing the chance of the gravel directly contacting the bottom of the reserved joint. In addition, when the vehicle runs over the reserved joint, the wheel first presses down the trigger part to flip the flap, and the stone accumulation part flips upward, picking up the gravel in the stone accumulation area, thereby effectively removing the gravel in the stone accumulation area and further reducing the impact of the gravel on the expansion joint.
[0008] Preferably, a convex ridge is provided in the middle of the top surface of the stone accumulation portion, and inclined stone striking surfaces are formed on both sides of the convex ridge.
[0009] By adopting the above technical solution, the convex ridge in the middle of the top surface of the stone accumulation part and the inclined stone-strike surfaces formed on both sides thereof can use the stone-strike surfaces to push the gravel and slightly adjust the pushing direction of the gravel during the process of the stone accumulation part pushing the gravel upward, thereby increasing the probability of the gravel being discharged from the current stone accumulation area.
[0010] Preferably, a mounting hole is provided at the bottom of the mounting groove, a booster spring is provided in the mounting hole, and the top of the booster spring abuts against the bottom of the trigger part.
[0011] By adopting the above technical solution, in the initial state, the booster spring pushes the trigger part to flip upward, ensuring that the stone accumulation part is in close contact with the support surface, thereby improving the stability of the state in which the stone accumulation part and the support surface are against each other. When the vehicle rolls over the reserved gap, the wheel first presses down on the trigger part, and at this time, it is necessary to overcome the elastic force of the booster spring, thereby increasing the safety of the trigger stroke. Once the wheel leaves the trigger part, the booster spring can quickly assist the flap to reset, so that the trigger part extends out of the top opening of the mounting slot again, preparing for the subsequent removal of other gravel. This not only improves the working efficiency of the flap, but also extends the service life of the flap and its components.
[0012] Preferably, an elastic compensation plate is connected to the bottom of the stone accumulation portion, and one end of the elastic compensation plate away from the stone accumulation portion is arranged obliquely upward compared to the stone accumulation portion, and one end of the elastic compensation plate away from the stone accumulation portion abuts against the side wall of the road base body.
[0013] By adopting the above technical solution, the elastic compensation plate can compensate for the gap between the stone accumulation part and the adjacent road base body, so that the smaller crushed stones can stay in the concave part formed between the stone accumulation part and the elastic compensation plate with a certain probability after the stone accumulation part falls. And this part of the smaller crushed stones can be discharged as the flap is turned upward, further reducing the probability of the crushed stones falling into the reserved gap.
[0014] Preferably, a concave surface for temporarily storing fine stones is provided at one end of the elastic compensation plate close to the stone accumulation portion.
[0015] By adopting the above technical solution, the fine stone temporary storage concave surface can increase the probability of small-sized crushed stones staying on the elastic compensation plate, thereby further reducing the possibility of crushed stones falling into the reserved gap. When the flap is flipped upward, the crushed stones stored in the fine stone temporary storage concave surface will be "popped out" as the elastic compensation plate deforms, effectively improving the efficiency of crushed stone discharge. In addition, the design of the fine stone temporary storage concave surface can also help adjust the direction of the crushed stones to make it easier to discharge from the stone accumulation area.
[0016] Preferably, a positioning hole is provided on the side wall of the road base body, and a positioning rod is provided at one end of the elastic compensation plate away from the stone accumulation portion, and the positioning rod is inserted into the positioning hole.
[0017] By adopting the above technical solution, the state of the positioning rod inserted into the positioning hole can be relatively stable, and the positioning rod can still remain inserted into the positioning hole during the rotation of the flap, thereby positioning the end position of the elastic compensation plate. This makes the elastic compensation plate deform itself during the flipping of the flap, and then the smaller gravel stored in the fine stone temporary storage concave surface will eventually "pop out" with the deformation of the elastic compensation plate. This design not only improves the discharge efficiency of smaller gravel, but also makes the movement trajectory of the fine stone temporary storage concave surface no longer rotate completely along the rotation trajectory of the end of the stone accumulation part, but is transformed into an arc rotation approximately with the installation rod as the center. With the deformation of the elastic compensation plate, the direction of the gravel popping out can be adjusted, which is more conducive to the discharge of the gravel from the reserved gap.
[0018] Preferably, the stone accumulation portion is rotatably connected to the elastic compensation plate.
[0019] By adopting the above technical solution, the stone accumulation part and the elastic compensation plate are rotatably connected, which can reduce the deformation effect of the stone accumulation part on the elastic compensation plate during rotation, especially the deformation change of the concave surface of the fine stone temporary storage, thereby improving the state stability during the crushed stone discharge process and preventing the crushed stone from sliding and falling directly into the bottom of the reserved seam due to the deformation of the concave surface of the fine stone temporary storage.
[0020] Preferably, the side wall of the flap is provided with stop hairs.
[0021] By adopting the above technical solution, the retaining hair can effectively prevent smaller-sized gravel from falling directly from the gap on the side of the flap to the bottom of the reserved joint, reducing the impact of the gravel on the expansion joint and improving the service life and reliability of the expansion joint.
[0022] Preferably, the side wall of the flap is provided with a nylon hook belt, the hair stop is provided on the nylon velvet belt, and the nylon velvet belt is fitted with the nylon hook belt.
[0023] By adopting the above technical solution, this design facilitates the disassembly, assembly and replacement of wearing parts such as the baffle, improving the convenience and efficiency of maintenance. At the same time, the baffle can effectively limit the small-sized gravel from falling directly from the gap on the side of the flap to the bottom of the reserved joint, further improving the overall protection performance of the expansion joint.
[0024] In the second aspect, the present application provides a highway bridge expansion joint repair and reinforcement construction method, which adopts the following technical solution: A highway bridge expansion joint maintenance and reinforcement construction method comprises the following steps: before installing a plurality of flaps, a spiral conveying auger is laid at the bottom of a reserved joint in advance, and an operation hole is reserved at the end of the reserved joint. Then, a cover plate is used to seal the top of the operation hole. During maintenance, the spiral conveying auger can be rotated to convey gravel at the bottom of the reserved joint to the operation hole, and then the gravel at the operation hole can be taken out.
[0025] By adopting the above technical solution, the impact of gravel on expansion joints can be effectively reduced. Specifically: A spiral conveyor auger is laid at the bottom of the reserved joint, and an operation hole is reserved at the end of the reserved joint. During maintenance, the crushed stones at the bottom of the reserved joint can be transported to the operation hole by rotating the spiral conveyor auger, and then the crushed stones can be taken out, thereby avoiding the long-term accumulation of crushed stones inside the reserved joint and reducing the impact of crushed stones on the expansion joint. The top of the operation hole is covered with a cover to ensure daily driving safety, and it is convenient for maintenance personnel to open the cover for cleaning when necessary. Regularly cleaning the crushed stones at the bottom of the reserved joint can significantly extend the service life of the expansion joint and reduce the maintenance frequency and cost caused by crushed stones. When the flap is damaged, the flap at the designated position can be replaced and reinstalled separately, which improves the flexibility and efficiency of maintenance.
[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The flap design can effectively prevent large-sized gravel from entering the bottom of the reserved joint, and automatically flip over to discharge the gravel when the vehicle rolls over it, significantly reducing the impact of the gravel on the expansion joint and extending the service life of the expansion joint; 2. The design of the ridges and the striking surface can adjust the pushing direction of the crushed stones in the process of pushing the crushed stones upward, increase the probability of the crushed stones being discharged from the stone accumulation area, and further enhance the self-cleaning ability of the expansion joint; 3. The setting of the assist spring not only improves the stability of the state where the trigger part is against the supporting surface, but also assists the flap to quickly reset after the wheel leaves, preparing for the subsequent discharge of other gravel. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application; Figure 2This is a structural schematic diagram for illustrating the connection relationship between the spiral conveying auger and the reserved seam in the embodiment of the present application; Figure 3 This is a structural schematic diagram for reflecting the connection relationship between the flap and the elastic compensation plate in the lower limit state of flipping downward in the embodiment of the present application; Figure 4 This is a structural schematic diagram for reflecting the connection relationship between the flap and the elastic compensation plate in the upper limit state of flipping upwards in the embodiment of the present application; Figure 5 This is a structural schematic diagram for illustrating the connection relationship between the convex edge and the striking stone surface in the embodiment of the present application; Figure 6 This is a structural schematic diagram for reflecting the position relationship of the hair blocking parts between adjacent flaps in the embodiment of the present application; Figure 7 It is a structural schematic diagram used to reflect the connection relationship between the flap and the bristle stop in the embodiment of the present application.
[0028] In the figure: 1. Road base; 10. Reserved seam; 11. Screw conveyor auger; 12. Operation hole; 13. Cover plate; 2. flap; 20. mounting groove; 21. trigger part; 22. stone accumulation part; 23. support surface; 24. booster spring; 240. mounting hole; 25. stone accumulation area; 26. convex edge; 27. stone striking surface; 3. Elastic compensation plate; 30. Concave surface for temporary storage of fine stones; 31. Positioning rod; 32. Positioning hole; 4. Hair stop; 41. Nylon velvet belt; 42. Nylon hook belt. DETAILED DESCRIPTION
[0029] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.
[0030] The inventors of the present application have discovered that during use, the expansion joint's expansion capacity is usually gradually weakened as gravel accumulates in the reserved gap. For this reason, the present application mainly adopts a highway bridge expansion joint structure. This design can effectively reduce the impact of gravel on the expansion joint and extend the service life of the expansion joint. The present application is further described in detail below. Example
[0031] Reference Figure 1The embodiment of the present application provides a highway bridge expansion joint structure, including a reserved joint 10 located between two basic bodies 1, the two basic bodies 1 are evenly divided with installation grooves 20, several installation grooves 20 are connected to the reserved joint 10, and flaps 2 are arranged in several installation grooves 20 through a rotating shaft, and the flaps 2 are staggered.
[0032] Reference Figure 2 A spiral conveying auger 11 is also arranged inside the reserved gap 10. The spiral conveying auger 11 is rotatably arranged through a bearing and can convey the mud, sand and gravel at the bottom of the reserved gap 10 to the end of the reserved gap 10 during the rotation of the spiral conveying auger 11. An operation hole 12 is reserved at the end of the reserved gap 10. The installation groove 20 and the flap 2 are not arranged at the top opening of the operation hole 12. The cover plate 13 is used to directly cover the operation hole 12.
[0033] Reference Figure 3 The flap 2 includes a trigger portion 21 and a stone accumulation portion 22, which are located on both sides of the shaft, and the trigger portion 21 is located more inside the mounting groove 20 when actually installed. The end of the trigger portion 21 away from the shaft extends out of the top opening of the mounting groove 20, while the end of the stone accumulation portion 22 away from the shaft extends into the reserved gap 10, and the mounting groove 20 has a support surface 23 for the bottom of the flap 2 to abut against.
[0034] Reference Figure 4 , when the trigger part 21 is pressed down, the stone accumulation part 22 can be lifted upward. A mounting hole 240 is provided at the bottom of the mounting groove 20, and a booster spring 24 is provided in the mounting hole 240, and the top of the booster spring 24 is against the bottom of the trigger part 21. This design is intended to help the flap 2 to reset faster. Specifically, the booster spring 24 can select springs of different types and specifications, such as coil springs, disc springs, etc. By selecting the appropriate spring type and preload force, the trigger part 21 can always remain in the state of extending out of the mounting groove 20 when not affected by external forces. When the vehicle runs over the trigger part 21, in addition to overcoming gravity, it is also necessary to overcome the elastic force of the booster spring 24, which will increase the trigger force, but it also means that after the vehicle leaves, the booster spring 24 can quickly pull the trigger part 21 back to its original position, so that the stone accumulation part 22 returns to the ready state again.
[0035] Reference Figure 3, adjacent flaps 2 are staggered with each other, so a V-shaped stone accumulation area 25 is formed above the intersection of several flaps 2, and the stone accumulation area 25 does not protrude from the road surface, but is located inside the reserved gap 10. In the initial state, the flap 2 abuts against the support surface 23, so that the trigger part 21 has a part extending out of the mounting groove 20, and the stone accumulation part 22 is inclined downward and extends to the inside of the reserved gap 10. When gravel on the surface of the road and bridge falls into the reserved gap 10, large-sized gravel can be stuck above several staggered flaps 2, that is, the gravel will be temporarily stored in the stone accumulation area 25, thereby realizing the protection of the reserved gap 10 and reducing the large-sized gravel from entering the bottom of the reserved gap 10. In addition, referring to Figure 4 When the vehicle rolls over the reserved gap 10, the wheel first presses down the trigger part 21, thereby realizing the flipping of the flap 2, so that the trigger part 21 rotates downward and is stored in the installation groove 20, and the stone accumulation part 22 flips upward until it is horizontal. In this process, the crushed stones in the stone accumulation area 25 are picked up during the lifting of the stone accumulation part 22, thereby facilitating the discharge of the crushed stones from the stone accumulation area 25.
[0036] In addition, refer to Figure 5 The middle part of the top surface of the stone accumulation part 22 extends upward to form an integral ridge 26, and inclined stone striking surfaces 27 are formed on both sides of the ridge 26. In this way, when the stone accumulation part 22 is turned upward, the stone striking surface 27 can push the crushed stones along a certain degree of inclination angle, increasing the probability of the crushed stones being thrown out. The height and slope of the ridge 26 can be adjusted according to actual conditions to achieve the best stone discharge effect.
[0037] Reference Figure 3 The bottom of the stone accumulation part 22 is also rotatably connected with an elastic compensation plate 3, and the end of the elastic compensation plate 3 away from the stone accumulation part 22 is inclined upward relative to the plane where the stone accumulation part 22 is located, and the end of the elastic compensation plate 3 away from the stone accumulation part 22 is against the side wall of the roadbed body 1. This design can effectively compensate for the gap between the stone accumulation part 22 and the roadbed and prevent small particles of gravel from entering the reserved seam 10. Specifically, the elastic compensation plate 3 can be made of a material with a certain elasticity, such as rubber, polyurethane, etc. The thickness and hardness of the elastic compensation plate 3 can be adjusted according to actual needs to ensure that the gap can be effectively compensated without affecting the normal rotation of the flap 2.
[0038] Reference Figure 3, a positioning hole 32 is provided on the side wall of the road base body 1, and a positioning rod 31 is provided at one end of the elastic compensation plate 3 away from the stone accumulation part 22, and the positioning rod 31 is adapted to be inserted into the positioning hole 32. The positioning hole 32 can be set at an appropriate position on the side wall of the road base body 1 to ensure the stability of the positioning rod 31 after insertion. The positioning rod 31 can be made of high-strength metal materials, such as stainless steel, aluminum alloy, etc., to withstand the torque generated when the flap 2 is flipped. The diameter and length of the positioning rod 31 can be adjusted according to actual needs to ensure that it can be firmly inserted into the positioning hole 32. The state of the positioning rod 31 inserted into the positioning hole 32 can be relatively stable, and the positioning rod 31 can still remain inserted into the positioning hole 32 during the rotation of the flap 2, thereby realizing the positioning of the end position of the elastic compensation plate 3, and then during the flipping of the flap 2, the elastic compensation plate 3 will deform itself, so that the small-sized crushed stones stored in the fine stone temporary storage concave surface 30 will eventually "pop out" with the deformation of the elastic compensation plate 3, so as to improve the discharge efficiency of the small-sized crushed stones.
[0039] In addition, refer to Figure 4 During this process, the movement trajectory of the fine stone temporary storage concave surface 30 no longer rotates completely along the rotation trajectory of the end of the stone accumulation part 22, but is transformed into an arc rotation approximately with the installation rod as the center. Combined with the deformation of the elastic compensation plate 3, the direction of the crushed stone ejection can be adjusted, which is more conducive to the discharge of the crushed stone from the reserved gap 10.
[0040] In addition, in order to further improve the discharge efficiency of small-particle crushed stones, a fine-stone temporary storage concave surface 30 is also provided at one end of the elastic compensation plate 3 near the stone accumulation portion 22. The design of the fine-stone temporary storage concave surface 30 can temporarily store a portion of small-particle crushed stones. When the flap 2 is turned over, these crushed stones will be thrown out during the deformation process of the elastic compensation plate 3, reducing the possibility of residual crushed stones. The shape and size of the fine-stone temporary storage concave surface 30 can be optimized according to actual needs to achieve the best stone storage and discharge effect.
[0041] In addition, the stone accumulation part 22 and the elastic compensation plate 3 are rotatably connected by a hinge, so that the deformation effect of the stone accumulation part 22 on the elastic compensation plate 3 during the rotation process can be reduced, especially at the fine stone temporary storage concave surface 30, and the deformation change of the fine stone temporary storage concave surface 30 can be reduced to improve the state stability during the crushed stone discharge process, and prevent the crushed stone from sliding down and falling directly to the bottom of the reserved gap 10 due to the deformation of the fine stone temporary storage concave surface 30.
[0042] Reference Figure 6 and Figure 7The side wall of the flap 2 is also provided with bristles 4, which are disassembled and assembled by attaching nylon velvet belts 41 and nylon hook belts 42. Specifically, the bristles 4 are arranged on the nylon velvet belts 41, and the nylon hook belts 42 are fixed to the side wall of the flap 2. The bristles 4 can help limit the small-sized gravel from falling directly from the gap on the side of the flap 2 to the bottom of the reserved seam 10. The detachable design of the bristles 4 also facilitates the disassembly and replacement of the bristles 4 as a vulnerable part.
[0043] The implementation principle of a highway bridge expansion joint structure in this embodiment is: In the initial state, the flap 2 abuts against the support surface 23, so that the trigger portion 21 has a portion extending out of the mounting groove 20, and the stone accumulation portion 22 tilts downward and extends into the reserved gap 10. When the gravel on the surface of the road and bridge falls into the reserved gap 10, the large-sized gravel can be stuck above a number of staggered flaps 2, that is, the gravel will be temporarily stored in the stone accumulation area 25, thereby protecting the reserved gap 10 and reducing the large-sized gravel from entering the bottom of the reserved gap 10.
[0044] In addition, when the vehicle rolls over the reserved gap 10, the wheel first presses down the trigger portion 21, thereby realizing the flipping of the flap 2, so that the trigger portion 21 rotates downward and is stored in the mounting groove 20, and the stone accumulation portion 22 flips upward until it is horizontal. During this process, the crushed stones in the stone accumulation area 25 are picked up during the lifting of the stone accumulation portion 22, thereby helping to discharge the crushed stones out of the stone accumulation area 25.
[0045] In addition, the elastic compensation plate 3 can compensate for the gap between the stone accumulation part 22 and the adjacent road base body 1, so that the smaller crushed stones can stay in the concave part formed between the stone accumulation part 22 and the elastic compensation plate 3 with a certain probability after the stone accumulation part 22 falls. And this part of the smaller crushed stones can be discharged as the flap 2 turns upward, further reducing the probability of the crushed stones falling into the reserved gap 10.
[0046] This embodiment also provides a highway bridge expansion joint repair and reinforcement construction method.
[0047] Before installing several flaps 2, a spiral conveying auger 11 is laid at the bottom of the reserved gap 10 in advance, and an operation hole 12 is reserved at the end of the reserved gap 10, and then the top of the operation hole 12 is covered with a cover plate 13. During maintenance, the spiral conveying auger 11 can be rotated to convey the gravel at the bottom of the reserved gap 10 to the operation hole 12, and then the gravel at the operation hole 12 can be taken out. Specifically, the spiral conveying auger 11 can use different types of spiral blades, such as straight blades, curved blades, etc., to adapt to gravel of different particle sizes.
[0048] In summary, the highway bridge expansion joint structure and maintenance and reinforcement construction method provided by the present invention effectively solves the problem of gravel accumulation in traditional expansion joints through a series of innovative designs, and significantly improves the service life and safety of expansion joints. In particular, when vehicles pass frequently, it can still maintain a good stone removal effect, reduce the falling of gravel to the bottom of the expansion joint, and greatly reduce maintenance costs and safety risks.
[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A highway bridge expansion joint structure, comprising a reserved joint (10) located between two basic bodies (1), characterized in that: The two road base bodies (1) are both provided with a mounting groove (20), the mounting groove (20) being connected with the reserved gap (10), a flap (2) being rotatably arranged in the mounting groove (20), the flap (2) comprising a triggering portion (21) and a stone accumulation portion (22) respectively located at both sides of the rotation connection between the flap (2) and the mounting groove (20), the end of the triggering portion (21) extending out of the top opening of the mounting groove (20), the stone accumulation portion (22) extending into the reserved gap (10), the mounting groove (20) having a supporting surface (23) for the flap (2) to abut against below, the plurality of flaps (2) on the two road base bodies (1) being staggered with each other, and a "V-shaped" stone accumulation area (25) being formed above the staggered position of the plurality of flaps (2), the stone accumulation area (25) being located inside the reserved gap (10).
2. A highway bridge expansion joint structure according to claim 1, characterized in that: The middle part of the top surface of the stone accumulation part (22) is provided with a convex ridge (26), and inclined stone striking surfaces (27) are formed on both sides of the convex ridge (26).
3. A highway bridge expansion joint structure according to claim 1, characterized in that: The bottom of the mounting groove (20) is provided with a mounting hole (240), a booster spring (24) is provided in the mounting hole (240), and the top of the booster spring (24) abuts against the bottom of the trigger portion (21).
4. The highway bridge expansion joint structure according to claim 1, characterized in that: The bottom of the stone accumulation portion (22) is connected to an elastic compensation plate (3); one end of the elastic compensation plate (3) away from the stone accumulation portion (22) is arranged obliquely upward compared to the stone accumulation portion (22); and one end of the elastic compensation plate (3) away from the stone accumulation portion (22) abuts against a side wall of the road base body (1).
5. A highway bridge expansion joint structure according to claim 4, characterized in that: One end of the elastic compensation plate (3) close to the stone accumulation portion (22) is provided with a fine stone temporary storage concave surface (30).
6. A highway bridge expansion joint structure according to claim 4, characterized in that: The side wall of the road base body (1) is provided with a positioning hole (32), and one end of the elastic compensation plate (3) away from the stone accumulation part (22) is provided with a positioning rod (31), and the positioning rod (31) is inserted into the positioning hole (32).
7. A highway bridge expansion joint structure according to claim 6, characterized in that: The stone accumulation portion (22) is rotatably connected to the elastic compensation plate (3).
8. The highway bridge expansion joint structure according to claim 1, characterized in that: The side wall of the flap (2) is provided with stopper hairs (4).
9. A highway bridge expansion joint structure according to claim 8, characterized in that: The side wall of the flap (2) is provided with a nylon hook belt (42), the bristles (4) are provided on the nylon velvet belt (41), and the nylon velvet belt (41) is in close contact with the nylon hook belt (42).
10. A method for repairing and reinforcing expansion joints of a highway bridge, characterized in that: Before installing a plurality of flaps (2), a spiral conveying auger (11) is laid in advance at the bottom of the reserved gap (10), and an operation hole (12) is reserved at the end of the reserved gap (10). Then, the top of the operation hole (12) is covered with a cover plate (13). During maintenance, the spiral conveying auger (11) can be rotated to convey the crushed stones at the bottom of the reserved gap (10) to the operation hole (12), and then the crushed stones at the operation hole (12) can be taken out.