Self-adaptive expansion joint structure for bridge and construction method of self-adaptive expansion joint structure
Through the adaptive expansion joint structure for bridges, the amount of expansion and contraction is absorbed by the reserved gap and elastic deformation, the bridge damage caused by the existing expansion joint structure in a single direction is solved, and the structural integrity and sealing are improved, which reduces maintenance costs and extends service life.
Patent Information
- Application Number
- CN202510710926.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-29
- Publication Date
- 2025-08-01
AI Technical Summary
The existing expansion joint structure can only work in a single direction, resulting in the extrusion and damage of the internal structure of the bridge.
Adaptive expansion joint structure for bridges is adopted, including base plate assembly, cover assembly, seal assembly, return spring and buffer assembly, which absorbs expansion and contraction by reserved gaps and elastic deformation, avoids structural collision and extrusion, and maintains a good sealing state using sealing components.
Effectively avoid extrusion and damage of the internal structure of the bridge, reduce maintenance frequency, reduce maintenance costs, extend the service life of the bridge, and maintain the integrity and sealing of the expansion joints to ensure the smooth driving of the vehicle.
Smart Images
Figure CN120401352A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of bridges, and particularly to an adaptive expansion joint structure for bridges and its construction method. Background Art
[0002] A bridge is an overhead building with load-bearing capacity, mainly used to span obstacles such as rivers, valleys, roads, railways, etc., enabling vehicles, pedestrians, etc. to pass safely and smoothly. Bridges extend and expand the transportation network, promote personnel exchanges, material transportation, and economic exchanges between regions. At the same time, bridges can drive the economic development of the areas along the line, promote resource development, industrial layout, and urbanization process. Among them, the expansion joint structure is an important structure for bridges to maintain stable operation.
[0003] Existing expansion joint structures use movable devices or elastic materials to allow the bridge girder to displace during thermal expansion and contraction, vehicle loads, or earthquakes, avoiding excessive stress inside the structure. However, existing expansion joint structures can only act in a single direction, resulting in the internal structure of the bridge being squeezed and damaged. Summary of the Invention
[0004] In view of the deficiencies of the prior art, the present invention provides an adaptive expansion joint structure for bridges and its construction method, which solves the problem that the internal structure of the bridge is squeezed and damaged due to the fact that the existing expansion joint structure can only act in a single direction.
[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: An adaptive expansion joint structure for bridges and its construction method, including a bridge body. A bottom plate assembly is provided on the inner bottom wall of the bridge body. A cover plate assembly is provided on the side wall of the bridge body. The cover plate assembly is connected to a sealing assembly. The bottom plate assembly is connected to the sealing assembly. The cover plate assembly is connected to a first reset spring. The bottom plate assembly is connected to the first reset spring. The bottom plate assembly is connected to a buffer assembly. The buffer assembly is connected to the cover plate assembly. The bottom plate assembly is connected to a positioning assembly. The positioning assembly is connected to the bridge body. The first reset spring is made of high-strength alloy steel.
[0006] Preferably, the bottom plate assembly includes a first bottom plate. The outer wall of the first bottom plate is provided on the inner bottom wall of the bridge body. The outer wall of the first bottom plate is fixedly connected to a first inserted tooth. A second bottom plate is provided on the side wall of the bridge body. The outer wall of the second bottom plate is fixedly connected to a second inserted tooth. The outer wall of the first inserted tooth is provided on the outer wall of the second inserted tooth. The lower outer wall of the first reset spring is provided inside the first bottom plate.
[0007] Preferably, the cover plate assembly includes a first cover plate, the outer wall of the first cover plate is disposed on the side wall of the bridge body, a first misaligned block is fixedly connected to the outer wall of the first cover plate, a second cover plate is disposed on the side wall of the bridge body, a second misaligned block is fixedly connected to the outer wall of the second cover plate, the outer wall of the first misaligned block is disposed on the outer wall of the second misaligned block, and the upper side outer wall of the first return spring is disposed inside the first cover plate.
[0008] Preferably, the sealing assembly includes a sealing block, the upper surface of the sealing block is disposed on the lower surface of the first cover plate, and sealing coatings are disposed on both the upper surface and the lower surface of the sealing block.
[0009] Preferably, the lower surface of the second cover plate is disposed on the upper surface of the sealing block, the lower surface of the sealing block is disposed on the upper surface of the first bottom plate, and the lower surface of the sealing block is disposed on the upper surface of the second bottom plate.
[0010] Preferably, the buffer assembly includes a first mounting block, the lower surface of the first mounting block is fixedly connected to the upper surface of the first bottom plate, a first rotating block is rotatably connected to the outer wall of the first mounting block, a rotating shaft is rotatably connected to the inner wall of the first rotating block, a transmission block is fixedly connected to the outer wall of the rotating shaft, a buffer spring is disposed inside the transmission block, a second rotating block is rotatably connected to the outer wall of the rotating shaft, a second mounting block is rotatably connected to the inner wall of the second rotating block, and the upper surface of the second mounting block is fixedly connected to the lower surface of the first cover plate.
[0011] Preferably, the sealing block is made of rubber, and the sealing coating is made of polysulfide sealant.
[0012] Preferably, the positioning assembly includes a first positioning block, the outer wall of the first positioning block is fixedly connected to the outer wall of the first bottom plate, a second return spring is disposed inside the first positioning block, a second positioning block is disposed on the outer wall of the second return spring, a clamping block is fixedly connected to the outer wall of the second positioning block, and the outer wall of the second positioning block is disposed inside the bridge body.
[0013] Preferably, a first card slot and a second card slot are formed inside the first positioning block, and the outer wall of the clamping block is disposed inside the first positioning block through the second card slot.
[0014] Preferably, a construction method for an adaptive expansion joint structure for a bridge includes the following steps: By opening a groove in the side wall of the bridge body, quickly installing the first bottom plate and the second bottom plate to a specified position inside the bridge body through the positioning assembly, then applying sealing coatings on both the upper and lower sides of the sealing block, and installing the sealing coatings on the upper sides of the first bottom plate and the second bottom plate, then sequentially installing a plurality of buffer assemblies and the first return spring on the upper sides of the first bottom plate and the second bottom plate, and installing the first cover plate and the second cover plate on the upper side of the sealing block through the sealing coating, and then pouring concrete around the expansion joint structure.
[0015] Working principle: The bridge body squeezes the bottom plate assembly and the cover plate assembly. There are pre-retained gaps horizontally in the bottom plate assembly and the cover plate assembly, which prevents the bottom plate assembly and the cover plate assembly from colliding. When a vehicle passes through the bridge body, the bridge body expands and contracts longitudinally. At this time, the bridge body drives the bottom plate assembly to expand and contract synchronously, and the buffer assembly and the first reset spring undergo elastic deformation to absorb the expansion and contraction amount. Thus, it can avoid the internal structure of the bridge body from being squeezed and damaged, reduce the maintenance frequency, control the maintenance cost of the bridge, maintain the integrity of the expansion joint structure and protect the main structure of the bridge body, and extend the service life of the bridge body.
[0016] When the cover plate assembly bears the load, the cover plate assembly drives the second mounting block to move downward. At this time, the second rotating block rotates driven by the second mounting block. Then, the rotating shaft rotates driven by the second rotating block. Subsequently, the transmission block moves synchronously driven by the rotating shaft. At this time, the buffer spring undergoes elastic deformation. Immediately, the first rotating block rotates driven by the rotating shaft. Thus, it can assist the first reset spring to undergo elastic deformation and absorb the contraction amount of the bridge body, avoid the bridge body from shaking violently due to the too-fast contraction of the first reset spring, and ensure the smooth driving of vehicles on the bridge body.
[0017] A cavity is formed by the bottom plate assembly, the cover plate assembly and the sealing block, and the buffer assembly and the first reset spring are placed in the cavity. The sealing block is made of rubber, and the sealing coating is made of polysulfide sealant. This ensures that the expansion joint can maintain a good sealing state under various working conditions. Thus, it can achieve the effect of keeping the relative seal inside the expansion joint, reducing the damage of moisture and debris to the expansion joint, extending the service life of the expansion joint, and saving resources.
[0018] By presetting a groove at a preset position inside the bridge body, then rotating the clamping block, immediately the second positioning block moves synchronously with the clamping block. Then, the clamping block is pulled down and inserted into the groove. Then, the second reset spring undergoes elastic deformation. At this time, the clamping block is rotated again and locked into the second clamping groove. Subsequently, the expansion joint structure is installed at the designated position and remains stable. Thus, it can achieve the effect of facilitating the positioning and installation of the expansion joint structure and avoiding the dislocation of the expansion joint structure during the pouring of concrete.
[0019] The present invention provides an adaptive expansion joint structure for bridges and its construction method. It has the following beneficial effects: 1. In the present invention, the bridge body squeezes the bottom plate assembly and the cover plate assembly. There are pre-retained gaps horizontally in the bottom plate assembly and the cover plate assembly, which prevents the bottom plate assembly and the cover plate assembly from colliding. Thus, it can achieve the effect of avoiding the internal structure of the bridge body from being squeezed and damaged, reducing the maintenance frequency, controlling the maintenance cost of the bridge, maintaining the integrity of the expansion joint structure and protecting the main structure of the bridge body, and extending the service life of the bridge body.
[0020] 2. When the cover plate assembly bears the load in the present invention, the cover plate assembly drives the second mounting block to move downward. At this time, the second rotating block rotates driven by the second mounting block, and then the rotating shaft rotates driven by the second rotating block, so as to assist the first reset spring to elastically deform and absorb the shrinkage amount of the bridge body, avoid the bridge body from shaking violently due to the too-fast shrinkage of the first reset spring, and ensure the smooth driving of vehicles on the bridge body.
[0021] 3. In the present invention, a cavity is formed by the bottom plate assembly, the cover plate assembly and the sealing block, and the buffer assembly and the first reset spring are placed in the cavity, so as to achieve the effect of maintaining the relative seal inside the expansion joint, reducing the damage of moisture and sundries to the expansion joint, prolonging the service life of the expansion joint and saving resources.
[0022] 4. In the present invention, a groove is opened at a preset position inside the bridge body, and then the clamping block is rotated. Immediately, the second positioning block moves synchronously with the clamping block, and then the clamping block is pulled down and inserted into the groove, so as to achieve the effect of facilitating the positioning and installation of the expansion joint structure and avoiding the dislocation of the expansion joint structure during the pouring of concrete. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a partial structural schematic diagram of the first cover plate of the present invention; Figure 3 is a partial structural schematic diagram of the first reset spring of the present invention; Figure 4 is a partial structural schematic diagram of the first bottom plate of the present invention; Figure 5 is a partial structural schematic diagram of the first dislocation block of the present invention; Figure 6 is a partial structural schematic diagram of the sealing coating of the present invention; Figure 7 is a partial structural schematic diagram of the first inserted tooth of the present invention; Figure 8 is a partial structural schematic diagram of the second reset spring of the present invention.
[0024] Among them, 1. Bridge body; 2. Bottom plate assembly; 21. First bottom plate; 22. Second bottom plate; 23. First inserted tooth; 24. Second inserted tooth; 3. Cover plate assembly; 31. First cover plate; 32. Second cover plate; 33. First dislocation block; 34. Second dislocation block; 4. Sealing assembly; 41. Sealing block; 42. Sealing coating; 5. Buffer assembly; 51. First mounting block; 52. First rotating block; 53. Rotating shaft; 54. Driving block; 55. Buffer spring; 56. Second rotating block; 57. Second mounting block; 6. First reset spring; 7. Positioning assembly; 71. First positioning block; 72. Second reset spring; 73. Second positioning block; 74. Clamping block; 75. First clamping groove; 76. Second clamping groove. Specific embodiments
[0025] The technical solutions of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work belong to the scope of protection of the present invention.
[0026] Please refer to the attached Figure 1 and the attached Figure 2 , an adaptive expansion joint structure for a bridge and its construction method provided by an embodiment of the present invention include a bridge body 1. A bottom plate assembly 2 is provided on the inner bottom wall of the bridge body 1. A cover plate assembly 3 is provided on the side wall of the bridge body 1. The cover plate assembly 3 is connected with a sealing assembly 4. The bottom plate assembly 2 is connected with the sealing assembly 4. The cover plate assembly 3 is connected with a first reset spring 6. The bottom plate assembly 2 is connected with the first reset spring 6. The bottom plate assembly 2 is connected with a buffer assembly 5. The buffer assembly 5 is connected with the cover plate assembly 3. The bottom plate assembly 2 is connected with a positioning assembly 7. The positioning assembly 7 is connected with the bridge body 1. The first reset spring 6 is made of high-strength alloy steel; Specifically, when the external temperature changes, the bridge body 1 expands under the influence of the temperature difference at this time. At this time, the bridge body 1 squeezes the bottom plate assembly 2 and the cover plate assembly 3. There is a pre-retained gap between the bottom plate assembly 2 and the cover plate assembly 3 horizontally. When a vehicle passes through the bridge body 1, the bridge body 1 expands and contracts longitudinally. At this time, the bridge body 1 drives the bottom plate assembly 2 to expand and contract synchronously. The buffer assembly 5 and the first reset spring 6 undergo elastic deformation under the action of the bottom plate assembly 2, absorbing the expansion and contraction amount. This avoids the internal tissues of the bridge body 1 being squeezed due to its own irregular expansion, thereby preventing damage to the internal structure of the bridge body 1 and cracks from appearing in the bridge body 1. Thus, it can achieve the effects of avoiding the internal structure of the bridge body 1 from being squeezed and damaged, reducing the maintenance frequency, reducing the input of manpower, material resources and financial resources, thereby controlling the maintenance cost of the bridge, maintaining the integrity of the expansion joint structure and protecting the main structure of the bridge body 1, extending the service life of the bridge body 1, and improving the use efficiency of the bridge body 1.
[0027] Refer to the attached Figure 4 and the attached Figure 7 , the bottom plate assembly 2 includes a first bottom plate 21, the outer wall of the first bottom plate 21 is arranged on the inner bottom wall of the bridge body 1, the outer wall of the first bottom plate 21 is fixedly connected with a first inserted tooth 23, the side wall of the bridge body 1 is provided with a second bottom plate 22, the outer wall of the second bottom plate 22 is fixedly connected with a second inserted tooth 24, the outer wall of the first inserted tooth 23 is arranged on the outer wall of the second inserted tooth 24, and the lower outer wall of the first return spring 6 is arranged inside the first bottom plate 21; Specifically, when the bridge body 1 expands under temperature difference, the first bottom plate 21 and the second bottom plate 22 move relatively under the drive of the bridge body 1. Since the first bottom plate 21 is fixedly connected with the first inserted tooth 23, and the second bottom plate 22 is fixedly connected with the second inserted tooth 24, the first inserted tooth 23 and the second inserted tooth 24 keep the first bottom plate 21 and the second bottom plate 22 moving synchronously, and there is a gap between the first inserted tooth 23 and the second inserted tooth 24, thereby avoiding the collision between the first bottom plate 21 and the second bottom plate 22.
[0028] Refer to the attached Figure 4 and the attached Figure 5 , the cover plate assembly 3 includes a first cover plate 31, the outer wall of the first cover plate 31 is arranged on the side wall of the bridge body 1, the outer wall of the first cover plate 31 is fixedly connected with a first misaligned block 33, the side wall of the bridge body 1 is provided with a second cover plate 32, the outer wall of the second cover plate 32 is fixedly connected with a second misaligned block 34, the outer wall of the first misaligned block 33 is arranged on the outer wall of the second misaligned block 34, and the upper outer wall of the first return spring 6 is arranged inside the first cover plate 31; Specifically, when the bridge body 1 expands under temperature difference, the first cover plate 31 and the second cover plate 32 move relatively under the drive of the bridge body 1. Since the first cover plate 31 is fixedly connected with the first misaligned block 33, and the second cover plate 32 is fixedly connected with the second misaligned block 34, the first misaligned block 33 and the second misaligned block 34 keep the first cover plate 31 and the second cover plate 32 moving synchronously, and there is a gap between the first misaligned block 33 and the second misaligned block 34, thereby avoiding the collision between the first cover plate 31 and the second cover plate 32.
[0029] Refer to the attached Figure 4 and the attached Figure 6 , the sealing assembly 4 includes a sealing block 41, the upper surface of the sealing block 41 is arranged on the lower surface of the first cover plate 31, and sealing coatings 42 are arranged on both the upper surface and the lower surface of the sealing block 41; Specifically, the sealing block 41 is used to fill the space between the bottom plate assembly 2 and the cover plate assembly 3, and the sealing coating 42 is used to further fill the gaps between the bottom plate assembly 2 and the sealing block 41, and between the cover plate assembly 3 and the sealing block 41.
[0030] Refer to the attached Figure 4 and the attached Figure 6, the lower surface of the second cover plate 32 is disposed on the upper surface of the sealing block 41, the lower surface of the sealing block 41 is disposed on the upper surface of the first bottom plate 21, and the lower surface of the sealing block 41 is disposed on the upper surface of the second bottom plate 22; Specifically, the second cover plate 32, the first bottom plate 21, and the second bottom plate 22 provide an installation position for the sealing block 41.
[0031] Refer to the appendix Figure 2 and the appendix Figure 3 , the buffer assembly 5 includes a first mounting block 51. The lower surface of the first mounting block 51 is fixedly connected to the upper surface of the first bottom plate 21. A first rotating block 52 is rotatably connected to the outer wall of the first mounting block 51. A rotating shaft 53 is rotatably connected to the inner wall of the first rotating block 52. A transmission block 54 is fixedly connected to the outer wall of the rotating shaft 53. A buffer spring 55 is disposed inside the transmission block 54. A second rotating block 56 is rotatably connected to the outer wall of the rotating shaft 53. A second mounting block 57 is rotatably connected to the inner wall of the second rotating block 56. The upper surface of the second mounting block 57 is fixedly connected to the lower surface of the first cover plate 31; Specifically, when the cover plate assembly 3 bears a load, the cover plate assembly 3 drives the second mounting block 57 to move downward. Then, the second rotating block 56 rotates under the drive of the second mounting block 57. Subsequently, the rotating shaft 53 rotates under the drive of the second rotating block 56. Since the rotating shaft 53 is fixedly connected to the transmission block 54, the transmission block 54 moves synchronously under the drive of the rotating shaft 53. At this time, the buffer spring 55 undergoes elastic deformation under the drive of the transmission block 54, and the buffer spring 55 is used to drive the transmission block 54 to reset. Furthermore, the first rotating block 52 rotates around the first mounting block 51 under the drive of the rotating shaft 53, so as to assist the elastic deformation of the first reset spring 6 and absorb the contraction amount of the bridge body 1, avoid the bridge body 1 from shaking violently due to the too-fast contraction of the first reset spring 6, ensure the smooth driving of vehicles on the bridge body 1, and improve the experience of passers-by on the upper side of the bridge body 1.
[0032] Refer to the appendix Figure 6 , the sealing block 41 is made of rubber, and the sealing coating 42 is made of polysulfide sealant; Specifically, a cavity is formed by the bottom plate assembly 2, the cover plate assembly 3 and the sealing block 41, and the buffer assembly 5 and the first return spring 6 are accommodated in the cavity. The sealing block 41 is made of rubber, which has good anti-aging performance. It can maintain its own elasticity and sealing performance in the long-term outdoor environment. At the same time, rubber can effectively resist the erosion of ultraviolet rays, ozone, etc., and is not prone to aging phenomena such as hardening and cracking, ensuring that the expansion joint always maintains a good sealing state, preventing moisture and debris from entering the inside of the expansion joint. The sealing coating 42 is made of polysulfide sealant, which has excellent water resistance and can maintain good sealing performance in a humid environment. The sealing coating 42 fills the fine gaps to prevent moisture from entering the inside of the expansion joint, avoiding damage to the bridge body 1 due to water erosion. Its anti-aging performance is excellent, and it can maintain a stable sealing effect. At the same time, the polysulfide sealant has strong adhesion and can firmly adhere between the sealing strip and the upper cover plate and the lower cover plate to form a reliable sealing barrier, ensuring that the expansion joint can maintain a good sealing state under various working conditions. Thus, it can achieve the effect of maintaining the relative sealing inside the expansion joint, reducing the damage of moisture and debris to the expansion joint, extending the service life of the expansion joint, and saving human, material and financial resources.
[0033] Refer to the appendix Figure 2 and the appendix Figure 8 , the positioning assembly 7 includes a first positioning block 71, the outer wall of the first positioning block 71 is fixedly connected to the outer wall of the first bottom plate 21, a second return spring 72 is arranged inside the first positioning block 71, a second positioning block 73 is arranged on the outer wall of the second return spring 72, and a clamping block 74 is fixedly connected to the outer wall of the second positioning block 73. The outer wall of the second positioning block 73 is arranged inside the bridge body 1; a first clamping groove 75 is opened inside the first positioning block 71, a second clamping groove 76 is opened inside the first positioning block 71, and the outer wall of the clamping block 74 is arranged inside the first positioning block 71 through the second clamping groove 76; Specifically, a groove is opened at a preset position inside the bridge body 1, and then the clamping block 74 is rotated. Since the second positioning block 73 is fixedly connected to the clamping block 74, the second positioning block 73 and the clamping block 74 move synchronously, and then the clamping block 74 is pulled down and inserted into the groove. Since the second return spring 72 is fixedly connected to the second positioning block 73, the second return spring 72 undergoes elastic deformation driven by the second positioning block 73 at this time. Then the clamping block 74 is rotated again and clamped into the second clamping groove 76. The second return spring 72 is used to assist in fixing the second positioning block 73. At this time, the expansion joint structure is installed at the specified position and remains stable. Thus, it can achieve the effect of facilitating the positioning and installation of the expansion joint structure, ensuring the stability of the expansion joint structure during the pouring of concrete, and avoiding the dislocation of the expansion joint structure under the impact of concrete.
[0034] Refer to the appendix Figure 1 - appendix Figure 8 , a construction method for an adaptive expansion joint structure for a bridge, includes the following steps: By opening a groove on the side wall of the bridge body 1, and quickly installing the first bottom plate 21 and the second bottom plate 22 to the designated position inside the bridge body 1 through the positioning component 7, then applying a sealing coating 42 on both the upper and lower sides of the sealing block 41, and installing the sealing coating 42 on the upper sides of the first bottom plate 21 and the second bottom plate 22. After that, a plurality of buffer components 5 and the first reset spring 6 are sequentially installed on the upper sides of the first bottom plate 21 and the second bottom plate 22, and the first cover plate 31 and the second cover plate 32 are installed on the upper side of the sealing block 41 through the sealing coating 42. Immediately, concrete is poured around the expansion joint structure.
[0035] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An adaptive expansion joint structure for a bridge, including a bridge body (1), characterized in that, The inner bottom wall of the bridge body (1) is provided with a bottom plate assembly (2), the side wall of the bridge body (1) is provided with a cover plate assembly (3), the cover plate assembly (3) is connected with a sealing assembly (4), the bottom plate assembly (2) is connected with the sealing assembly (4), the cover plate assembly (3) is connected with a first return spring (6), the bottom plate assembly (2) is connected with the first return spring (6), the bottom plate assembly (2) is connected with a buffer assembly (5), the buffer assembly (5) is connected with the cover plate assembly (3), the bottom plate assembly (2) is connected with a positioning assembly (7), the positioning assembly (7) is connected with the bridge body (1), and the first return spring (6) is made of high-strength alloy steel.
2. The adaptive expansion joint structure for a bridge according to claim 1, wherein The bottom plate assembly (2) includes a first bottom plate (21), the outer wall of the first bottom plate (21) is arranged on the inner bottom wall of the bridge body (1), the outer wall of the first bottom plate (21) is fixedly connected with a first inserted tooth (23), the side wall of the bridge body (1) is provided with a second bottom plate (22), the outer wall of the second bottom plate (22) is fixedly connected with a second inserted tooth (24), the outer wall of the first inserted tooth (23) is arranged on the outer wall of the second inserted tooth (24), and the lower outer wall of the first return spring (6) is arranged inside the first bottom plate (21).
3. An adaptive expansion joint structure for a bridge according to claim 1, characterized in that, The cover plate assembly (3) includes a first cover plate (31), the outer wall of the first cover plate (31) is arranged on the side wall of the bridge body (1), the outer wall of the first cover plate (31) is fixedly connected with a first misaligned block (33), the side wall of the bridge body (1) is provided with a second cover plate (32), the outer wall of the second cover plate (32) is fixedly connected with a second misaligned block (34), the outer wall of the first misaligned block (33) is arranged on the outer wall of the second misaligned block (34), and the upper outer wall of the first return spring (6) is arranged inside the first cover plate (31).
4. An adaptive expansion joint structure for a bridge according to claim 1, characterized in that, The sealing assembly (4) includes a sealing block (41), the upper surface of the sealing block (41) is arranged on the lower surface of the first cover plate (31), and sealing coatings (42) are arranged on both the upper surface and the lower surface of the sealing block (41).
5. An adaptive expansion joint structure for a bridge according to claim 3, characterized in that, The lower surface of the second cover plate (32) is arranged on the upper surface of the sealing block (41), the lower surface of the sealing block (41) is arranged on the upper surface of the first bottom plate (21), and the lower surface of the sealing block (41) is arranged on the upper surface of the second bottom plate (22).
6. An adaptive expansion joint structure for a bridge according to claim 1, characterized in that, The buffer assembly (5) includes a first mounting block (51), the lower surface of the first mounting block (51) is fixedly connected to the upper surface of the first bottom plate (21), a first rotating block (52) is rotatably connected to the outer wall of the first mounting block (51), a rotating shaft (53) is rotatably connected to the inner wall of the first rotating block (52), a transmission block (54) is fixedly connected to the outer wall of the rotating shaft (53), a buffer spring (55) is arranged inside the transmission block (54), a second rotating block (56) is rotatably connected to the outer wall of the rotating shaft (53), a second mounting block (57) is rotatably connected to the inner wall of the second rotating block (56), and the upper surface of the second mounting block (57) is fixedly connected to the lower surface of the first cover plate (31).
7. An adaptive expansion joint structure for a bridge according to claim 4, characterized in that, The sealing block (41) is made of rubber, and the sealing coating (42) is made of polysulfide sealant.
8. An adaptive expansion joint structure for a bridge according to claim 1, characterized in that, The positioning assembly (7) includes a first positioning block (71). The outer wall of the first positioning block (71) is fixedly connected to the outer wall of the first bottom plate (21). A second return spring (72) is arranged inside the first positioning block (71). A second positioning block (73) is arranged on the outer wall of the second return spring (72). A clamping block (74) is fixedly connected to the outer wall of the second positioning block (73). The outer wall of the second positioning block (73) is arranged inside the bridge body (1).
9. The adaptive expansion joint structure for a bridge according to claim 8, characterized in that, A first card slot (75) and a second card slot (76) are formed inside the first positioning block (71). The outer wall of the clamping block (74) is arranged inside the first positioning block (71) through the second card slot (76).
10. A construction method for an adaptive expansion joint structure for bridges, characterized in that, Applied to the bridge adaptive expansion joint structure according to any one of claims 1-9, it includes the following steps: By opening a groove on the side wall of the bridge body (1), and quickly installing the first bottom plate (21) and the second bottom plate (22) to the designated position inside the bridge body (1) through the positioning assembly (7), then applying the sealing coating (42) on both the upper and lower sides of the sealing block (41), and installing the sealing coating (42) on the upper sides of the first bottom plate (21) and the second bottom plate (22). After that, a plurality of buffer assemblies (5) and the first return spring (6) are sequentially installed on the upper sides of the first bottom plate (21) and the second bottom plate (22), and the first cover plate (31) and the second cover plate (32) are installed on the upper side of the sealing block (41) through the sealing coating (42). Immediately, concrete is poured around the expansion joint structure.