Multi-layer anti-drainage device for bridge deformation expansion joint

Abstract

The utility model relates to the technical field of bridge construction engineering, in particular to a multilayer drainage prevention device for a bridge deformation expansion joint, which is characterized in that a drainage structure is arranged below a deformation joint expansion structure and can collect and guide liquid leaked by the deformation joint expansion structure; leaked liquid can be guided into a designated drainage port or drainage system through the drainage structure, effective liquid collection and drainage are achieved, the leaked liquid is prevented from entering the internal structure of the bridge, the waterproof performance of the expansion joint can be effectively improved through the multi-layer design of the deformation joint expansion joint structure and the drainage structure, and the service life of the expansion joint is prolonged. Leakage liquid is effectively prevented from entering the internal structure of the bridge, corrosion and other diseases are reduced, and the service life of the bridge is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge construction engineering, and in particular to a multi-layer anti-drainage device for bridge expansion joints. Background Technology

[0002] Existing bridge expansion joints are mainly classified into butt-joint type, steel-supported type, combined shear type (plate type), modular support type, and elastic device type. These different types of expansion joints are suitable for different expansion amounts and bridge structural requirements. Among them, the most common butt-joint type expansion joint device is the metal plate U-shaped expansion joint, which is suitable for small and medium-span bridges with deformation within 20mm. It is made of copper or zinc plate into a U-shape and fixed to the beams at both ends of the expansion gap. It can be filled with compressible fillers such as asphalt mastic, plastic sealant, or asphalt sand. Steel plate expansion joints are suitable for beam bridges and steel bridges with expansion amounts of 20-40mm, or long continuous beams or continuous bridge deck structures with expansion amounts up to 400mm.

[0003] The main drawback of bridge expansion joints is their poor waterproofing performance, which makes them prone to leakage. This allows rainwater and debris to enter the bridge structure, potentially causing severe corrosion of the concrete and steel reinforcement. This corrosion weakens the integrity of the bridge structure and reduces its load-bearing capacity. Furthermore, leaks in the expansion joints can erode the bridge deck concrete, leading to potholes and other defects that affect driving comfort and safety.

[0004] Furthermore, leaks in expansion joints can cause the bearing rubber to age and crack, and the steel plates to rust, affecting the normal expansion and contraction function of the bridge.

[0005] Furthermore, leaks in expansion joints can leave water stains or dirt on the bridge deck or structural columns. These marks can damage the overall aesthetics of the building, especially on public buildings, giving an impression of untidiness and unprofessionalism. Moreover, repeated corrosion caused by leaks in expansion joints can lead to damage to beam-column joints, further affecting the overall stability, performance, and service life of the bridge.

[0006] This utility model was proposed in response to the shortcomings of the existing technology. Utility Model Content

[0007] The aforementioned technical issues address the poor waterproofing performance of existing bridge expansion joint structures, which are prone to leakage and rainwater corrosion, thus affecting the bridge structure.

[0008] The technical solution adopted by this utility model to solve its technical problem is:

[0009] A multi-layer anti-drainage device for bridge expansion joints includes an expansion joint structure and a drainage structure arranged sequentially from top to bottom. The expansion joint structure is located at the bridge structure, and the drainage structure is located below the expansion joint structure and connected to the bridge structure. The drainage structure can collect liquid leaking from the expansion joint structure.

[0010] As described above, the multi-layer drainage device for bridge expansion joints includes a first drainage channel, a first connecting component, and a second connecting component. The first connecting component and the second connecting component are respectively located at both ends of the first drainage channel, and both the first connecting component and the second connecting component are connected to the bridge structure.

[0011] As described above, in the multi-layer anti-drainage device for bridge expansion joints, the first connecting component includes a first connecting bolt, and / or the second connecting component includes a second connecting bolt.

[0012] As described above, in the multi-layer anti-drainage device for bridge expansion joints, the first connecting component includes a first connecting bolt, and the second connecting component includes a connecting beam suspended on the bridge structure and a first connecting member connected to the connecting beam.

[0013] As described above, the multi-layer drainage device for bridge expansion joints includes a first drainage trough and a second drainage trough. The first connecting component is disposed on the first drainage trough connecting plate, the second connecting component is disposed on the second drainage trough connecting plate, and a third connecting component is provided between the first drainage trough connecting plate and the second drainage trough connecting plate to enable them to be connected.

[0014] As described above, the multi-layer drainage device for bridge expansion joints includes a second drainage channel located below the first drainage channel. The second drainage channel collects liquid leaking from the first drainage channel. The drainage structure also includes a fourth connecting component and a fifth connecting component, which are located at opposite ends of the second drainage channel. Both the fourth and fifth connecting components are connected to the bridge structure, or the fourth connecting component is connected to the bridge structure and the fifth connecting component is connected to the second connecting component.

[0015] As described above, in the multi-layer anti-drainage device for bridge expansion joints, the fourth connecting component includes a second connecting bolt, the second connecting component includes a connecting beam suspended on the bridge structure and a first connecting member connected to the connecting beam, and the fifth connecting component is connected to the connecting beam.

[0016] As described above, in the multi-layer drainage device for bridge expansion joints, one end of the second drainage channel with a fifth connecting component is connected to the bottom of the connecting beam, and one end of the first drainage channel with a first connecting member is connected to the middle area of ​​the connecting beam.

[0017] As described above, in the multi-layer drainage device for bridge expansion joints, the second drainage channel includes a third water channel connecting plate and a fourth water channel connecting plate. The fourth connecting component is disposed on the first water channel connecting plate, the fifth connecting component is disposed on the second water channel connecting plate, and a sixth connecting component is provided between the third water channel connecting plate and the fourth water channel connecting plate to enable them to be connected.

[0018] The multi-layer drainage device for bridge expansion joints as described above includes an expansion joint assembly and a waterstop, with the waterstop located above the drainage structure.

[0019] The beneficial effects of this utility model are:

[0020] This utility model relates to the technical field of bridge construction engineering, specifically a multi-layered anti-drainage device for bridge expansion joints. The device incorporates a drainage structure beneath the expansion joint structure. This drainage structure collects and guides leaked liquid from the expansion joint, directing it to a designated drain outlet or drainage system. This achieves effective liquid collection and discharge, preventing leaked liquid from entering the bridge's internal structure. The multi-layered design of the expansion joint and drainage structure effectively improves the waterproofing performance of the expansion joint, preventing leaked liquid from entering the bridge's internal structure, reducing corrosion and other damage, and extending the bridge's service life.

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a top view of the present invention assembled on a bridge structure;

[0023] Figure 2 This is a cross-sectional view of the present invention assembled on a bridge structure;

[0024] Figure 3 This is a partially enlarged schematic diagram of the expansion joint structure of this utility model assembled on a bridge structure.

[0025] Figure 4 This is a partially enlarged schematic diagram of the first drainage channel of this utility model assembled on a bridge structure;

[0026] Figure 5 This is a partially enlarged schematic diagram of the second drainage channel of this utility model assembled on a bridge structure. Detailed Implementation

[0027] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] like Figures 1 to 5 As shown, the multi-layer anti-drainage device for bridge expansion joints in this embodiment includes an expansion joint structure 1 and a drainage structure 2 arranged sequentially from top to bottom. The expansion joint structure 1 is located at the bridge structure 100, and the drainage structure 2 is located below the expansion joint structure 1 and connected to the bridge structure 100. The drainage structure 2 can collect the liquid leaking from the expansion joint structure 1, prevent the leaked liquid from entering the internal structure of the bridge, and avoid corrosion and damage to the bridge structure.

[0029] Specifically, while absorbing bridge deformation, the expansion joint structure 1 may experience some leakage. Alternatively, due to prolonged outdoor operation, the expansion joint structure 1 may be damaged by environmental factors, leading to liquid leakage. To prevent the leaked liquid from entering the bridge's internal structure, a drainage structure 2 is installed below the expansion joint structure 1. The drainage structure 2 is designed to collect and divert the leaked liquid from the expansion joint structure 1, ensuring that the liquid does not corrode or otherwise adversely affect the bridge structure.

[0030] Furthermore, the leaked liquid can be guided to a designated drain outlet or drainage system through the drainage structure 2, thereby achieving effective liquid collection and discharge.

[0031] The multi-layer design of expansion joint structure 1 and drainage structure 2 effectively improves the waterproof performance of the expansion joint, effectively prevents leakage liquid from entering the internal structure of the bridge, reduces corrosion and other defects, and extends the service life of the bridge.

[0032] like Figures 1 to 5 As shown, the drainage structure 2 in this embodiment includes a first drainage channel 21, a first connecting component 22, and a second connecting component 23. The first connecting component 22 and the second connecting component 23 are respectively disposed at both ends of the first drainage channel 21. Both the first connecting component 22 and the second connecting component 23 are connected to the bridge structure 100 to ensure the stability of the drainage channel and prevent liquid leakage at the connection point.

[0033] Specifically, when the expansion joint structure 1 leaks, the leaked liquid will drip into the first drainage channel 21 and be guided to the drainage system or a designated drain outlet through the first drainage channel 21.

[0034] like Figures 1 to 5As shown, the first connecting component 22 in this embodiment includes a first connecting bolt, and the second connecting component 23 includes a connecting beam hoisted on the bridge structure 100 and a first connecting member connected to the connecting beam.

[0035] Since the expansion joint structure 1 is connected between two structural plates 103 of the bridge structure 100, and the structural beams 102 on the two structural plates 103 are far apart, a connecting beam that is close to the structural beam 102 on one structural plate 103 is hoisted on it to facilitate the assembly of the drainage channel.

[0036] Preferably, the first connecting member can be connected by welding, bolting or other methods to ensure that the connecting beam and the first drainage channel 21 are firmly connected.

[0037] In other embodiments, the first connecting component 22 includes a first connecting bolt, and the second connecting component 23 includes a second connecting bolt. The connecting bolts are typically made of high-strength and corrosion-resistant metals, such as stainless steel or galvanized steel. Using high-strength and corrosion-resistant materials (such as stainless steel) ensures the strength and stability of the bolts during long-term use and prevents loosening or damage due to corrosion.

[0038] Preferably, adding a rubber gasket between the bolt and nut, along with the use of sealant, can effectively prevent moisture from seeping into the connection and improve the overall waterproof performance.

[0039] Bolt connections are simple to use. During construction, you only need to align the bolt with the pre-designed connection hole, insert the bolt, and tighten the nut. It is convenient and quick.

[0040] When maintenance is required, the bolts can be easily disassembled and reinstalled, reducing maintenance costs and difficulty.

[0041] Furthermore, bolted connection components have relatively low costs, and the materials are easy to procure and replace, resulting in good overall system economy.

[0042] Connection holes are pre-designed and machined on the first drainage channel 21 and the bridge structure 100. Preferably, the connection holes are usually set at the structural beam 102 on the bridge structure 100 to ensure accurate hole position and good alignment.

[0043] During installation, first align the first drainage channel 21 with the connection hole on the bridge structure 100, then insert the first connecting bolt and the second connecting bolt in sequence, and tighten the nuts to ensure a firm connection. After the bolts are installed, seal the connection area by applying sealant to ensure there is no leakage.

[0044] This embodiment is applicable when the structural beams 102 of two structural plates 103 are relatively close to each other.

[0045] In other embodiments, the connecting hole may also be located at the bottom of the two structural plates 103, or the connecting hole may also be located on the connecting beam at the bottom of the two structural plates 103, and a suitable design may be selected according to actual needs.

[0046] like Figures 1 to 5 As shown, the first drainage trough 21 in this embodiment includes a first water tank connecting plate 211 and a second water tank connecting plate 212. The first connecting component 22 is disposed on the first water tank connecting plate 211, and the second connecting component 23 is disposed on the second water tank connecting plate 212. A third connecting component is provided between the first water tank connecting plate 211 and the second water tank connecting plate 212 to enable the two to be connected.

[0047] In this embodiment, the second connecting component 23 includes a connecting beam and a first connecting member. This design allows the first water tank connecting plate 211 to be assembled onto the structural beam 102 via the first connecting component 22 during construction. Then, the second water tank connecting plate 212 is connected to the connecting beam via the first connecting member. Next, the connecting beam with the second water tank connecting plate 212 is hoisted to the structural plate 103. Finally, the second water tank connecting plate 212 and the first water tank connecting plate 211 are connected via the third connecting component to achieve the assembly of the first drainage trough 21.

[0048] Preferably, the third connecting component can be connected by bolts, welding or snap-fit ​​connection. Preferably, this embodiment adopts a snap-fit ​​connection method, and weather-resistant sealant is applied at the connection between the first water tank connecting plate 211 and the second water tank connecting plate 212 to realize the assembly of the first drainage tank 21 and facilitate subsequent maintenance and cleaning.

[0049] This design allows for on-site cutting and assembly when the connecting beams and / or water tank connecting plates are excessively long, optimizing the assembly process and enhancing construction flexibility.

[0050] Preferably, a stiffening plate 213 is also provided between the connecting beam and the second water tank connecting plate 212. The stiffening plate 213 can enhance the structural strength of the first drainage tank 21 and effectively prevent the first drainage tank 21 from being damaged due to excessive deformation.

[0051] like Figures 1 to 5As shown, the drainage structure 2 in this embodiment also includes a second drainage channel 24, which is located below the first drainage channel 21. The second drainage channel 24 can collect the liquid leaking from the first drainage channel 21. The drainage structure 2 also includes a fourth connecting component 25 and a fifth connecting component 26, which are respectively disposed at both ends of the second drainage channel 24. Both the fourth connecting component 25 and the fifth connecting component 26 are connected to the bridge structure 100, or the fourth connecting component 25 is connected to the bridge structure 100 and the fifth connecting component 26 is connected to the second connecting component 23.

[0052] Specifically, by adding a second drainage channel 24 below the first drainage channel 21, double drainage protection is provided. Even if the first drainage channel 21 leaks, the second drainage channel 24 can effectively collect excess liquid and prevent liquid from entering the bridge interior.

[0053] Specifically, the overall stability and reliability of the drainage system are significantly enhanced through the multiple supports of the first connecting bolt, the second connecting component, the fourth connecting component, and the fifth connecting component.

[0054] like Figures 1 to 5 As shown, the fourth connecting component 25 in this embodiment includes a second connecting bolt, the second connecting component 23 includes a connecting beam hoisted on the bridge structure 100 and a first connecting member connected to the connecting beam, and the fifth connecting component 26 is connected to the connecting beam.

[0055] The connection method of the fifth connecting component 26 to the connecting beam is similar to the connection method of the first connecting component to the connecting beam, that is, the connection method of the first drainage channel 21 and the second drainage channel 24 to the structural beam 102 and the connecting beam is similar, and will not be described again here; adopting this method can further simplify the assembly process of the drainage device, which is conducive to improving construction efficiency and enhancing construction flexibility.

[0056] like Figures 1 to 5 As shown, in this embodiment, the second drainage trough 24 has one end of the fifth connecting component 26 connected to the bottom of the connecting beam, and the first drainage trough 21 has one end of the first connecting component connected to the middle area of ​​the connecting beam.

[0057] With this design, the second drainage channel 24 acts as a second barrier, receiving liquid that the first drainage channel 21 fails to drain, providing additional drainage capacity. Even if the first drainage channel 21 leaks or has poor drainage, the second drainage channel 24 can effectively collect excess liquid and discharge it, preventing liquid from entering the bridge interior and thus protecting the bridge structure.

[0058] With multiple connecting components for fixation, the entire drainage system is more stable, reducing the risk of damage caused by structural movement or vibration.

[0059] Preferably, the fourth connecting component 25 and the fifth connecting component 26 ensure that the second drainage channel 24 remains stable under different stress conditions and is not easily displaced or detached.

[0060] Preferably, the first drainage layer (first drainage channel 21) is responsible for the initial collection and discharge of rainwater or other liquids to prevent the liquids from directly contacting the main structure of the bridge.

[0061] The second drainage layer (second drainage trough 24) serves as a supplementary protective layer, further collecting and draining any liquid that may overflow from the first drainage trough 21, providing double protection.

[0062] The drainage system is secured at multiple points by the first connecting component 22, the second connecting component 23, the fourth connecting component 25, and the fifth connecting component 26, ensuring stability in complex stress environments and reducing deformation and displacement.

[0063] Furthermore, by rationally arranging the connecting beams and the first connecting component, stress is evenly distributed to all parts of the bridge structure, avoiding structural damage caused by local stress concentration.

[0064] Preferably, the connecting beam is an I-beam.

[0065] like Figures 1 to 5 As shown, the second drainage trough 24 in this embodiment includes a third water tank connecting plate 241 and a fourth water tank connecting plate 242. The fourth connecting component 25 is disposed on the first water tank connecting plate 211, the fifth connecting component 26 is disposed on the second water tank connecting plate 212, and a sixth connecting component is provided between the third water tank connecting plate 241 and the fourth water tank connecting plate 242 to enable the two to be connected.

[0066] This design makes the construction process of the second drainage channel 24 similar to that of the first drainage channel 21, which will not be repeated here. It simplifies the assembly process of the drainage device and helps to improve construction efficiency and enhance construction flexibility.

[0067] like Figures 1 to 5 As shown, the expansion joint structure 1 of this embodiment includes an expansion joint assembly 11 and a waterstop 12. The waterstop 12 is located above the drainage structure 2. With this design, the waterstop 12 serves as the first layer of waterproof drainage structure. The waterstop 12 is set above the drainage structure 2 to form the first line of defense, preventing water from entering the bridge or other structures below the drainage structure 2.

[0068] Preferably, the waterstop 12 has a certain inclination or drainage design, so that the accumulated water can be discharged quickly, avoid stagnation, and significantly reduce the possibility of water seepage.

[0069] Waterstop 12 not only waterproofs, but also effectively drains water and prevents water from accumulating on the bridge deck or other structural surfaces.

[0070] This creates a triple waterproof structure consisting of the waterstop 12, the first drainage channel 21, and the second drainage channel 24, which improves the waterproof performance of the expansion joint and thus extends the overall service life of the bridge.

[0071] Preferably, the construction process in this embodiment is as follows:

[0072] Step 1: The water tank connecting plates (second water tank connecting plate 212 and fourth water tank connecting plate 242) connecting the first drainage trough 21 and the second drainage trough 24 to the connecting beam are preferably made of steel structure. After being welded in the processing plant, they are transported to the construction site. When the length of the connecting beam and / or the water tank connecting plate is too long, cutting, splicing and positioning welding can be carried out on site.

[0073] Step 2: On-site positioning and installation of the water tank connecting plates (first water tank connecting plate 211 and third water tank connecting plate 241) that are connected to the structural beam 102.

[0074] Step 3: Connecting beam hoisting → Connecting beam to bridge structure 100 (such as bridge concrete columns, bridge steel columns, structural slab 103, etc., which can be connected by welding, bolts, clips, hanging, etc.).

[0075] Step 4: Install the prefabricated expansion joint device 1 on the bridge structure 100. This device needs to be installed with embedded parts during the pouring of the structural slab 103.

[0076] Step 5: Inspect and clean the first drainage trough 21 and the second drainage trough 24 → Connect the water trough connecting plates using connecting components (such as snap fasteners) → Apply weather-resistant sealant to the joints of the corresponding water trough connecting plates → Complete the assembly of the drainage troughs.

[0077] Specifically, the innovative features of the multi-layered waterproofing and drainage system in this embodiment are as follows:

[0078] (1) Prevent water accumulation and leakage: The design of multiple drainage channels helps to collect water and harmful liquids leaking from the first layer of expansion joints more effectively, prevent water accumulation from damaging the structure or causing leakage problems due to water accumulation, effectively prevent water seepage problems in expansion joints, set up three lines of defense, improve the waterproof performance of expansion joints, and thus extend the overall service life of the bridge.

[0079] (2) Adapting to temperature changes: Expansion joints are designed to adapt to the thermal expansion and contraction of buildings or structures due to temperature changes. The design of multiple drainage channels can further ensure the normal function of expansion joints at different temperatures and make up for the performance of the first expansion joint affected by the large temperature difference.

[0080] (3) Integrated structure: The steel plates of the drainage channel can be produced in the steel structure processing plant and transported to the construction site, reducing the construction time on the construction site and facilitating installation and maintenance. The modular design of the expansion joint can be easily prefabricated and assembled on site, reducing the workload of on-site welding and cutting, and reducing the construction difficulty. All drainage channels are assembled by the project and transported to the construction site. When they are too long, they can be re-cut and reassembled on site, making installation simple. The expansion joint adopts the prefabricated expansion joint device commonly used in bridges, which meets the requirements of easy installation while waterproofing, and solves the problem of high construction difficulty of existing technology.

[0081] (4) Environmental protection: An effective drainage system helps prevent harmful substances from entering the bridge structure through expansion joints, protecting the health of the structure and reducing environmental pollution.

[0082] (5) Aesthetics: The rationally designed multi-channel drainage can ensure functionality while also taking into account the aesthetics of the building, and blend harmoniously with the bridge structure. The effective anti-seepage and drainage design can prevent water erosion of the bridge beams and slabs at the expansion joints, leaving water stains, dirt, and moss growth, thus maintaining the cleanliness and beauty of the bridge.

[0083] (6) Enhance the durability of the structure: A good drainage system can reduce the erosion of the materials around the expansion joint by water, thereby extending the service life of the structure, and may also be an effective improvement to existing engineering practices.

[0084] (7) Reduce pollution and maintenance costs: Effectively prevent water from seeping from the expansion joints into the bridge beams and structural columns, reduce pollution to the bridge surface, and lower maintenance costs.

[0085] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A multi-layer anti-drainage device for bridge expansion joints, characterized in that: It includes an expansion joint structure (1) and a drainage structure (2) arranged sequentially from top to bottom. The expansion joint structure (1) is located at the bridge structure (100), and the drainage structure (2) is located below the expansion joint structure (1) and is connected to the bridge structure (100). The drainage structure (2) can collect the liquid leaking from the expansion joint structure (1).

2. The multi-layer anti-drainage device for bridge expansion joints according to claim 1, characterized in that: The drainage structure (2) includes a first drainage channel (21), a first connecting component (22) and a second connecting component (23). The first connecting component (22) and the second connecting component (23) are respectively located at both ends of the first drainage channel (21). The first connecting component (22) and the second connecting component (23) are both connected to the bridge structure (100).

3. The multi-layer anti-drainage device for bridge expansion joints according to claim 2, characterized in that: The first connecting component (22) includes a first connecting bolt, and / or the second connecting component (23) includes a second connecting bolt.

4. The multi-layer anti-drainage device for bridge expansion joints according to claim 2, characterized in that: The first connecting assembly (22) includes a first connecting bolt, and the second connecting assembly (23) includes a connecting beam suspended on the bridge structure (100) and a first connecting member connected to the connecting beam.

5. The multi-layer anti-drainage device for bridge expansion joints according to any one of claims 2 to 4, characterized in that: The first drainage trough (21) includes a first water tank connecting plate (211) and a second water tank connecting plate (212). The first connecting component (22) is disposed on the first water tank connecting plate (211), and the second connecting component (23) is disposed on the second water tank connecting plate (212). A third connecting component is provided between the first water tank connecting plate (211) and the second water tank connecting plate (212) to enable the two to be connected.

6. The multi-layer anti-drainage device for bridge expansion joints according to claim 2, characterized in that: The drainage structure (2) further includes a second drainage channel (24), which is located below the first drainage channel (21). The second drainage channel (24) can collect the liquid leaked from the first drainage channel (21). The drainage structure (2) also includes a fourth connecting component (25) and a fifth connecting component (26). The fourth connecting component (25) and the fifth connecting component (26) are respectively located at both ends of the second drainage channel (24). The fourth connecting component (25) and the fifth connecting component (26) are both connected to the bridge structure (100), or the fourth connecting component (25) is connected to the bridge structure (100), and the fifth connecting component (26) is connected to the second connecting component (23).

7. The multi-layer anti-drainage device for bridge expansion joints according to claim 6, characterized in that: The fourth connecting component (25) includes a second connecting bolt, the second connecting component (23) includes a connecting beam suspended on the bridge structure (100) and a first connecting member connected to the connecting beam, and the fifth connecting component (26) is connected to the connecting beam.

8. The multi-layer anti-drainage device for bridge expansion joints according to claim 7, characterized in that: The second drainage channel (24) has one end of a fifth connecting component (26) connected to the bottom of the connecting beam, and the first drainage channel (21) has one end of a first connecting member connected to the middle area of ​​the connecting beam.

9. The multi-layer anti-drainage device for bridge expansion joints according to any one of claims 6 to 8, characterized in that: The second drainage trough (24) includes a third water trough connecting plate (241) and a fourth water trough connecting plate (242). The fourth connecting component (25) is disposed on the first water trough connecting plate (211), and the fifth connecting component (26) is disposed on the second water trough connecting plate (212). A sixth connecting component is provided between the third water trough connecting plate (241) and the fourth water trough connecting plate (242) to enable the two to be connected.

10. The multi-layer anti-drainage device for bridge expansion joints according to claim 1, characterized in that: The expansion joint structure (1) includes an expansion joint assembly (11) and a waterstop (12), the waterstop (12) being located above the drainage structure (2).

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