Bridge expansion joint structure

Abstract

The utility model provides a bridge expansion joint structure relates to bridge technical field, including two bridge bodies, the top of two bridge bodies is near one end all is equipped with Z type groove, the inside all is embedded with Z type board in Z type groove, the one end all is equipped with first convex slot in Z type board, the inside all is embedded with convex board in first convex slot, fixedly connected with connecting plate between convex board, the surface of connecting plate is equal interval and is connected with vertical rod in sliding connection who penetrates, the top fixedly connected with top plate in vertical rod. In the utility model, through the nesting structure of Z type groove, Z type board, convex slot and convex board, the longitudinal, transverse multidirectional displacement of adaptation bridge, the buffer load of elastic sheet, vertical rod, avoid stress concentration, protect bridge body, through the telescopic rubber board, the effect of forming " double waterproof defense line" can be achieved through the nesting sealing of double convex slot, so as to can reach the effect of reducing the risk of leakage, can effectively protect the internal structure of bridge.

Description

Technical Field

[0001] This utility model relates to the field of bridge technology, and in particular to a bridge expansion joint structure. Background Technology

[0002] With the booming development of transportation, bridge construction is expanding in scale, increasing in span, and diversifying in form. Simultaneously, traffic flow continues to grow, and vehicle loads are becoming increasingly heavy, placing higher demands on bridge performance. Furthermore, the environmental conditions surrounding bridges are becoming increasingly complex, including drastic temperature changes, strong winds, and earthquakes, all of which cause bridge expansion and contraction. Against this backdrop, bridge expansion joints, as key components for regulating bridge deformation and ensuring smooth traffic flow, directly impact the service life of bridges and traffic safety. Therefore, the research and optimization of bridge expansion joint structures have become crucial.

[0003] Traditional bridge expansion joint structures are ill-suited to accommodate multi-directional bridge displacements, and rigid connections are prone to stress concentration, leading to cracks in both the expansion joints and the main bridge structure. Furthermore, single rubber seals are susceptible to uneven pressure and material aging, resulting in high leakage rates. Rainwater seeps in and corrodes the reinforcing steel, shortening the bridge's lifespan. Additionally, the unevenness at the expansion joint joints generates impact loads and noise when vehicles pass over them, reducing the driving experience and exacerbating bridge structural vibrations, thus accelerating component fatigue damage. Utility Model Content

[0004] The purpose of this invention is to solve the problems in the existing technology where bridge expansion joint structures are difficult to adapt to the multi-directional displacement of bridges, and rigid connections are prone to stress concentration, leading to cracking of the expansion joint and the main body of the bridge. Therefore, this invention proposes a bridge expansion joint structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a bridge expansion joint structure, comprising two bridge bodies, each of the two bridge bodies having a Z-shaped groove on its top and near one end, a Z-shaped plate embedded inside each Z-shaped groove, a first convex groove on one end of each Z-shaped plate, a convex plate embedded inside each first convex groove, a connecting plate fixedly connected between the convex plates, vertical rods slidably connected through and at equal intervals on the surface of the connecting plate, a top plate fixedly connected to the top of each vertical rod, elastic pieces provided at the bottom and near both sides of the top plate, a second convex groove on one side wall of the Z-shaped plate and both ends of the top plate, and a telescopic rubber plate provided between the Z-shaped plate and the top plate, both ends of the telescopic rubber plate being embedded in and adapted to the second convex groove.

[0006] Preferably, the top of the Z-shaped plate is provided with first mounting holes at equal intervals, and the top inner wall of the Z-shaped groove is provided with second mounting grooves at equal intervals, and the first mounting holes are aligned with the second mounting grooves.

[0007] Preferably, the top plate has second mounting holes evenly spaced at its top and near its edge, and the surface of the spring sheet has evenly spaced circular holes, with the second mounting holes aligned with the circular holes.

[0008] Preferably, both ends of the telescopic rubber sheet are adapted to the second convex groove.

[0009] Preferably, the bottom of each vertical rod is fixedly connected to a limiting plate.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0011] 1. In this utility model, the nested structure of Z-shaped groove, Z-shaped plate, convex groove and convex plate is adapted to the longitudinal and transverse multi-directional displacement of the bridge. The spring sheet and vertical rod buffer the load, avoid stress concentration and protect the main body of the bridge.

[0012] 2. In this utility model, the use of telescopic rubber plates and double convex grooves for nested sealing can form a "double waterproof defense line", thereby reducing the risk of leakage and effectively protecting the internal structure of the bridge.

[0013] 3. In this utility model, by covering the surface of the expansion joint with a top plate and using elastic support with spring sheets to fill the splicing gap, the smoothness of vehicles passing through is significantly improved, the impact load and noise are reduced, and the vibration of the bridge and the wear and tear of vehicle components are reduced. Attached Figure Description

[0014] Figure 1 This utility model provides an overall three-dimensional structural view of a bridge expansion joint structure;

[0015] Figure 2 This utility model provides an overall structural plan view of a bridge expansion joint structure;

[0016] Figure 3 This utility model presents a partial bottom view of a bridge expansion joint structure.

[0017] Legend: 1. Bridge body; 2. Z-shaped groove; 3. Z-shaped plate; 4. First convex groove; 5. Connecting plate; 6. Convex plate; 7. Vertical rod; 8. Top plate; 9. Spring piece; 10. Second convex groove; 11. Telescopic rubber plate; 12. First mounting hole; 13. Second mounting groove; 14. Second mounting hole; 15. Round hole; 16. Limiting plate. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Example 1, such as Figure 1-3 As shown, this utility model provides a bridge expansion joint structure, including two bridge bodies 1. Each of the two bridge bodies 1 has a Z-shaped groove 2 on its top and near one end. A Z-shaped plate 3 is embedded inside the Z-shaped groove 2. A first convex groove 4 is formed at one end of each Z-shaped plate 3. A convex plate 6 is embedded inside the first convex groove 4. A connecting plate 5 is fixedly connected between the convex plates 6. Vertical rods 7 are slidably connected through the surface of the connecting plate 5 at equal intervals. A top plate 8 is fixedly connected to the top of the vertical rod 7. Spring pieces 9 are provided at the bottom and near both sides of the top plate 8. A second convex groove 10 is formed on one side wall of the Z-shaped plate 3 and at both ends of the top plate 8. An expansion rubber plate 11 is provided between the Z-shaped plate 3 and the top plate 8. Both ends of the expansion rubber plate 11 are embedded inside the second convex groove 10 and are adapted to it.

[0021] The overall effect of Embodiment 1 is as follows: Z-shaped grooves 2 are provided on the top of both bridge bodies 1 near one end, and Z-shaped plates 3 are embedded inside the Z-shaped grooves 2, which can achieve the effect of embedding the Z-shaped plates 3 into the Z-shaped grooves 2. A first convex groove 4 is provided at one end of each Z-shaped plate 3, and a convex plate 6 is embedded inside the first convex groove 4. A connecting plate 5 is fixedly connected between the convex plates 6, which can achieve the effect of moving the connecting plate 5 and the convex plates 6 between the first convex grooves 4. Vertical rods 7 are slidably connected through the surface of the connecting plate 5 at equal intervals. The top of the vertical rod 7 is fixedly connected to the top plate 8, which can limit the vertical rod 7 to the top plate 8. The bottom of the top plate 8 and near both sides are provided with spring pieces 9, which can vibrate the top plate 8. The side wall of the Z-shaped plate 3 and both ends of the top plate 8 are provided with second convex grooves 10. The Z-shaped plate 3 and the top plate 8 are provided with telescopic rubber plates 11. Both ends of the telescopic rubber plates 11 are embedded in the second convex grooves 10 and are adapted to them, which can cause the bridge body 1 to pull or squeeze the telescopic rubber plates 11 due to temperature changes.

[0022] Example 2, as Figure 1-3 As shown, the top of the Z-shaped plate 3 is provided with first mounting holes 12 at equal intervals, and the inner wall of the top of the Z-shaped groove 2 is provided with second mounting grooves 13 at equal intervals. The first mounting holes 12 are aligned with the second mounting grooves 13. The top of the top plate 8 and near the edge is provided with second mounting holes 14 at equal intervals. The surface of the spring piece 9 is provided with round holes 15 at equal intervals. The second mounting holes 14 are aligned with the round holes 15. Both ends of the telescopic rubber plate 11 are adapted to the second convex groove 10. The bottom of the vertical rod 7 is fixedly connected to the limit plate 16.

[0023] The overall effect of embodiment 2 is as follows: First mounting holes 12 are evenly spaced on the top of the Z-shaped plate 3, and second mounting grooves 13 are evenly spaced on the inner wall of the top of the Z-shaped groove 2. The first mounting holes 12 are aligned with the second mounting grooves 13, thus securing the Z-shaped plate 3. Second mounting holes 14 are evenly spaced on the top of the top plate 8 near its edge, and round holes 15 are evenly spaced on the surface of the spring piece 9. The second mounting holes 14 are aligned with the round holes 15, thus securing the spring piece 9. Both ends of the telescopic rubber plate 11 are adapted to the second convex groove 10, thus limiting the movement of both ends of the telescopic rubber plate 11. Limiting plates 16 are fixedly connected to the bottom of the vertical rod 7, thus preventing the vertical rod 7 from detaching from the connecting plate 5.

[0024] Working principle: By embedding the Z-shaped plate 3 into the Z-shaped groove 2 of the bridge body 1, the convex plate 6 engages with the first convex groove 4, and the connecting plate 5, vertical rod 7, and top plate 8 form the upper load-bearing structure. The telescopic rubber plate 11 is embedded at both ends into the second convex groove 10, sealing the gap between the Z-shaped plate 3 and the top plate 8. The spring plate 9 naturally deforms elastically, supporting the top plate 8 to be flush with the bridge body 1. Each component is precisely positioned through the mounting holes and grooves, forming an initial structure of "nested sealing + elastic support," waiting for the bridge deformation to trigger a response. When the bridge undergoes longitudinal elongation or shortening deformation due to changes in ambient temperature, the Z-shaped groove 2 is pulled to move with the bridge body 1. When the Z-shaped groove 2 moves, the nested Z-shaped plate 3 slides longitudinally along the groove, and the first convex groove 4 simultaneously drives the convex plate 6 and connecting plate 5 to move, releasing the longitudinal deformation stress of the bridge and avoiding forced constraint. 1. Due to the sliding of Z-shaped plate 3, tensile or compressive deformation occurs. The elasticity of the rubber maintains the sealing state within the second convex groove 10, preventing rainwater from seeping in. The top plate 8 moves with Z-shaped plate 3, and the spring sheet 9 expands and contracts elastically in sync, ensuring that the top plate 8 is always smoothly connected to the surface of the bridge body 1, so that there is no obvious bump when vehicles pass. When heavy vehicles pass, the bridge experiences local vertical vibration and lateral displacement. The expansion joint needs to adapt to the multi-dimensional deformation in sync. When the vehicle load applies pressure to the top plate 8, the top plate 8 compresses the spring sheet 9 to produce elastic deformation, absorbing the vertical impact energy. The vertical rod 7 drives the limiting plate 16 to move down synchronously, limiting the deformation range and avoiding excessive compression. When the uneven load causes a slight lateral displacement of the bridge, the nested structure of Z-shaped plate 3 and Z-shaped groove 2 produces a slight lateral sliding. The first convex groove 4, convex plate 6, and connecting plate 5 adjust together to adapt to the lateral deformation and release stress.

[0025] The wiring diagram of the bridge body 1 in this utility model is common knowledge in the field. Its working principle is a well-known technology. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the bridge body 1 will not be explained in detail.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A bridge expansion joint structure, comprising two bridge bodies (1), characterized in that: Z-shaped grooves (2) are provided on the top of both bridge bodies (1) and near one end. Z-shaped plates (3) are embedded inside the Z-shaped grooves (2). A first convex groove (4) is provided at one end of each Z-shaped plate (3). A convex plate (6) is embedded inside the first convex groove (4). A connecting plate (5) is fixedly connected between the convex plates (6). Vertical rods (7) are slidably connected through the surface of the connecting plate (5) at equal intervals. A top plate (8) is fixedly connected to the top of the vertical rod (7). Spring pieces (9) are provided at the bottom and near both sides of the top plate (8). A second convex groove (10) is provided on one side wall of the Z-shaped plate (3) and at both ends of the top plate (8). A telescopic rubber plate (11) is provided between the Z-shaped plate (3) and the top plate (8). Both ends of the telescopic rubber plate (11) are embedded inside the second convex groove (10) and adapted to it.

2. The bridge expansion joint structure according to claim 1, characterized in that: The top of the Z-shaped plate (3) is provided with first mounting holes (12) at equal intervals, and the top inner wall of the Z-shaped groove (2) is provided with second mounting grooves (13) at equal intervals. The first mounting holes (12) are aligned with the second mounting grooves (13).

3. The bridge expansion joint structure according to claim 1, characterized in that: The top plate (8) has a second mounting hole (14) at equal intervals near the edge, and the surface of the spring piece (9) has a round hole (15) at equal intervals. The second mounting hole (14) is aligned with the round hole (15).

4. A bridge expansion joint structure according to claim 1, characterized in that: Both ends of the telescopic rubber plate (11) are adapted to the second convex groove (10).

5. A bridge expansion joint structure according to claim 1, characterized in that: The bottom of each vertical rod (7) is fixedly connected to a limiting plate (16).

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