Bridge expansion joint anti-blocking structure

Abstract

The utility model relates to a bridge expansion joint anti-blocking structure which comprises two edge beams located on the two sides of an expansion joint, sealing grooves are formed in the opposite sides of the two edge beams and extend in the length direction of the edge beams, a rubber water stop belt is inserted between the two opposite sealing grooves, an anti-crack layer is pasted between the two opposite edge beams, and the anti-crack layer is arranged between the two opposite edge beams. And when the height between the upper surface of the anti-crack layer and the side walls of the edge beams on the two sides is larger than 4 cm, the space between the lower surface of the anti-crack layer and the upper surface of the rubber waterstop is further filled with an elastic sealing material when the height between the upper surface of the rubber waterstop and the top faces of the edge beams is larger than 4 cm. Through multi-layer sealing protection, the modular expansion device effectively prevents the expansion joint from being blocked, improves the driving safety and comfort, reduces the maintenance cost, is convenient and efficient in construction and high in structural stability, and is suitable for existing and newly-built bridges.

Description

Technical Field

[0001] This application relates to the field of bridge engineering technology, and in particular to a structure for preventing blockage of bridge expansion joints. Background Technology

[0002] In bridge engineering, expansion joints are typically installed between bridge spans to accommodate the movement of the bridge superstructure under varying environmental conditions. During actual use, bridges experience deformation, vibration, and displacement due to factors such as concrete shrinkage and creep, temperature stress, vehicle traffic, braking, and earthquakes. Expansion joints accommodate these deformations, preventing internal cracking of the concrete and impact on the bridge structure. Furthermore, expansion joints can prevent rainwater and sediment from entering the beams or supports through waterproofing materials (such as rubber waterstops), avoiding corrosion of the cap beams and supports, thus ensuring the durability of the bridge structure and indirectly extending its overall lifespan.

[0003] However, currently, after bridge construction, the expansion joints are left open, and their function is generally maintained by manually cleaning the gaps of sand and gravel during routine maintenance. This method has many problems: After blockage, the surface of the expansion joint becomes uneven, causing severe bumps when vehicles pass over it, seriously affecting driving comfort and safety; long-term accumulation of sand and gravel inside the modular expansion joint prevents it from expanding and contracting properly, hindering the expansion of the bridge structure in high summer temperatures. Cleaning requires the removal of part of the structure, which is time-consuming and costly; if the blockage is severe, the entire expansion joint device may need to be replaced; leaks and bearing damage caused by blockages can spread to other parts of the bridge, such as the bridge deck pavement or piers, leading to an ever-expanding maintenance scope; manual cleaning of expansion joints is not only time-consuming, labor-intensive, and inefficient, but also carries high risks, easily damaging the rubber waterstops during the cleaning process, failing to effectively solve the problem of blockage and failing to meet the demands of modern bridge engineering for efficient maintenance and long-term stable operation of expansion joints. Utility Model Content

[0004] This utility model mainly addresses the problems of existing bridge expansion joints being prone to clogging, difficult to clean, costly to maintain, and having adverse effects on traffic safety and bridge structure, by providing a bridge expansion joint anti-clogging structure.

[0005] The objective of this utility model is mainly achieved through the following solution:

[0006] A bridge expansion joint anti-clogging structure includes two side beams located on both sides of the expansion joint. Each of the two side beams has a sealing groove on its opposite side, which extends along the length of the side beam. A rubber waterstop is inserted between the two opposite sealing grooves. A crack-resistant layer is adhered between the two opposite side beams. A sealant layer is filled between the upper surface of the crack-resistant layer and the side walls of the two side beams. When the height between the upper surface of the rubber waterstop and the top surface of the side beam is greater than 4 cm, an elastic sealing material is also filled between the lower surface of the crack-resistant layer and the upper surface of the rubber waterstop.

[0007] Preferably, the crack-resistant layer is a road-grade self-adhesive crack-resistant adhesive.

[0008] Preferably, the distance between the top surface of the two sides of the crack-resistant layer and the top surface of the side beam is 3-7 mm.

[0009] Preferably, the sealant layer is made of potting compound.

[0010] Preferably, the top surface of the sealant layer is flush with the top surface of the side beam.

[0011] Preferably, the elastic sealing material is polystyrene, polyethylene foam, or polypropylene foam.

[0012] In summary, compared with the prior art, the present invention has the following beneficial technical effects:

[0013] (1) This utility model effectively prevents blockage. Through the synergistic effect of the crack-resistant layer, the sealant layer and the elastic sealing material, a multi-layer sealing and protective structure is formed, which can effectively block moisture, sand, dust and other substances from entering the expansion joint, avoid blockage of the expansion joint, and ensure that the expansion joint can perform its expansion and contraction functions normally under various environmental conditions.

[0014] (2) This utility model improves driving safety and comfort, avoids uneven surface caused by expansion joint blockage, and does not cause severe bumps when the vehicle passes through, significantly improving driving safety and comfort, and reducing vehicle wear and the probability of traffic accidents.

[0015] (3) This utility model reduces maintenance costs, reduces the workload of cleaning and repairing expansion joints after blockage, avoids the situation where the entire expansion joint device needs to be replaced due to severe blockage, greatly reduces the long-term maintenance cost of bridges, and at the same time, due to the good performance of the sealant layer and crack-resistant layer, the service life of the expansion joint is extended, further saving maintenance funds.

[0016] (4) This utility model is convenient and efficient to construct, has a simple structure, strong environmental adaptability, and can be constructed in sections to ensure uninterrupted traffic. Moreover, the materials used are easy to install and operate, and can be completed quickly, reducing the impact of construction on traffic and improving construction efficiency.

[0017] (5) The structure of this utility model is highly stable. The crack-resistant layer, the sealant layer and the elastic sealing material are closely matched and support each other. It can withstand the repeated action of vehicle load and the influence of external environmental factors, ensuring the structural stability of the expansion joint during long-term use and improving the overall safety and durability of the bridge. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is another structural schematic diagram of the present invention;

[0020] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a schematic diagram of the structure of this utility model using double expansion joints.

[0022] Reference numerals: 1-Side beam, 2-Sealing groove, 3-Rubber waterstop, 4-Crack-resistant layer, 5-Sealing adhesive layer, 6-Elastic sealing material, 7-Center beam. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0024] Example 1:

[0025] like Figure 1 , 2 As shown in Figure 3, this utility model discloses a technical solution: a bridge expansion joint anti-clogging structure, including two side beams 1 located on both sides of the expansion joint. The upper part of the opposite side of the two side beams 1 is provided with an inner vertical surface, and a sealing groove 2 is provided on the opposite side of the two side beams 1. The sealing groove 2 is located below the inner vertical surface and extends along the length direction of the side beam 1. A rubber waterstop 3 is inserted between the two opposite sealing grooves 2. A crack-resistant layer 4 is pasted between the two opposite side beams 1. A sealant layer 5 is filled between the upper surface of the crack-resistant layer 4 and the side walls of the two side beams 1. When the height between the upper surface of the rubber waterstop 3 and the top surface of the side beam 1 is greater than 4cm, an elastic sealing material 6 is also filled between the lower surface of the crack-resistant layer 4 and the upper surface of the rubber waterstop 3.

[0026] A multi-layered protective system is formed by setting up an anti-cracking layer 4, a sealant layer 5, and an elastic sealing material 6. The anti-cracking layer 4 can adapt to the deformation of the expansion joint, prevent cracks from forming, and provide a stable foundation for the sealant layer 5. The sealant layer 5 can effectively prevent moisture, sand, dust, and other debris from entering the expansion joint, playing a major sealing role. The elastic sealing material 6 is filled when the height between the rubber waterstop 3 and the top surface of the edge beam 1 is greater than 4cm. It not only provides support for the anti-cracking layer 4, but also absorbs energy and buffers external forces when the expansion joint is subjected to external impact. The three work together to effectively prevent the expansion joint from becoming clogged, ensuring that the expansion joint can perform its expansion and contraction functions normally under various environmental conditions, extending the service life of the bridge expansion joint, and reducing bridge structural damage and maintenance costs caused by expansion joint clogging.

[0027] Example 2:

[0028] like Figure 1 , 2 As shown in Figure 3, this utility model discloses another technical solution: a bridge expansion joint anti-clogging structure. The difference from embodiment 1 is that the crack-resistant layer 4 uses a road-grade self-adhesive crack-resistant adhesive, which can be purchased commercially. The road-grade self-adhesive crack-resistant adhesive, as the crack-resistant layer 4, utilizes its pre-coated high-performance adhesive layer to firmly bond with the side beam 1 and other structures without the need for additional adhesive, simplifying the construction process. This crack-resistant adhesive has good deformation adaptability, maintaining elasticity in low-temperature environments and not flowing or detaching at high temperatures (70℃). It can adapt to the deformation requirements of expansion joints under different temperature environments. At the same time, its substrate tensile strength is ≥8KN / m, which can withstand the repeated action of vehicle loads, ensuring that it will not be easily damaged during long-term use. It effectively prevents cracks from appearing in the expansion joint due to the failure of the crack-resistant layer, thereby avoiding debris from entering and causing blockage, and providing a strong guarantee for the stability and reliability of the entire anti-clogging structure.

[0029] Specifically, the distance between the top surface of both sides of the crack-resistant layer 4 and the top surface of the edge beam 1 is 3-7mm, and the two sides of the crack-resistant layer 4 can be bonded to the inner surface of the edge beam 1; in this embodiment, 5mm is preferred. This setting has multiple advantages: on the one hand, it ensures that there is sufficient bonding area between the crack-resistant layer 4 and the edge beam 1, ensuring that the crack-resistant layer 4 can be tightly connected to the edge beam 1 during the deformation of the expansion joint and will not easily fall off; on the other hand, it reserves a suitable space for the filling of the sealant layer 5, so that the sealant layer 5 can be fully filled and form a continuous and uniform sealing layer, enhancing the sealing effect and effectively preventing external debris from entering the expansion joint; if the distance is too small, the sealant layer 5 may not be fully filled, affecting the sealing performance; if the distance is too large, it may reduce the connection strength between the crack-resistant layer 4 and the edge beam 1, affecting the overall stability of the anti-clogging structure.

[0030] Example 3:

[0031] like Figure 1, 2 As shown in Figure 3, this utility model discloses another technical solution: a bridge expansion joint anti-clogging structure. The difference from Embodiment 1 is that the sealant layer 5 uses potting compound. The potting compound can tightly bond with the crack-resistant layer 4 and the edge beam 1, forming a strong sealing layer that effectively prevents moisture, sand, and other debris from entering the expansion joint. Furthermore, the potting compound maintains good sealing performance under different temperature conditions and will not crack or detach due to temperature changes. In addition, the potting compound allows for rapid construction, shortening the construction cycle and reducing the impact on traffic. It also meets the requirements of modern engineering construction, reducing environmental pollution. By using potting compound as the sealant layer, the sealing effect and overall performance of the expansion joint anti-clogging structure are greatly improved.

[0032] In this embodiment, the potting compound can be an EPO-100 series epoxy resin potting compound, a PU-200 model polyurethane potting compound, or an LSR-300 series silicone potting compound.

[0033] Specifically, the top surface of the sealant layer 5 is flush with the top surface of the side beam 1, ensuring the flatness of the expansion joint surface. When vehicles pass through the expansion joint, they will not experience bumps due to the sealant layer 5 being too high or too low, thus improving driving comfort and safety. At the same time, the flat surface helps reduce the uneven force exerted by vehicle loads on the sealant layer 5, preventing damage to the sealant layer 5 due to uneven stress, extending the service life of the sealant layer 5, and thus ensuring the long-term effective operation of the entire anti-clogging structure, continuously playing its role in preventing expansion joint blockage.

[0034] Example 4:

[0035] like Figure 1 , 2 As shown in Figure 3, this utility model discloses another technical solution, a bridge expansion joint anti-clogging structure, which differs from Embodiment 1 in that the elastic sealing material 6 is made of polystyrene, polyethylene foam or polypropylene foam. These materials have good elasticity and plasticity, and their shape and thickness can be flexibly adjusted according to the type of modular expansion joint. When the expansion joint is subjected to external impact or undergoes expansion and contraction deformation, the elastic sealing material 6 can absorb the impact energy through its own deformation, buffer the external force, reduce the impact on the crack-resistant layer 4 and the sealing adhesive layer 5, and protect the entire anti-clogging structure.

[0036] like Figure 4 As shown, this is a multi-slot modular expansion joint, with a middle beam 7 between the two side beams 1. This anti-clogging structure is used between the side beams 1 and the middle beam 7.

[0037] This utility model provides a bridge expansion joint anti-clogging structure, and the specific construction is as follows:

[0038] 1. For example Figure 2As shown, when the height between the upper surface of the rubber waterstop 3 and the top surface of the edge beam 1 is greater than 4cm:

[0039] First, clean the inside of the expansion joint. Then, select polystyrene elastic sealant and fill it onto the upper surface of the rubber waterstop 3. Adjust the shape and thickness of the elastic sealant 6 according to the actual situation of the expansion joint to ensure it fits tightly against the rubber waterstop 3 and the side beam 1, providing stable support for the subsequent crack-resistant layer 4. Next, insert the road-use self-adhesive crack-resistant tape into the gap between the two side beams 1, keeping the distance between the top surface of the crack-resistant tape on both sides and the top surface of the side beam 5mm. Fully bond the two sides of the crack-resistant tape to the inner surface of the side beam 1 to ensure that the crack-resistant tape is firmly fixed and can adapt to the deformation of the expansion joint. Finally, pour the heated potting compound from the middle to both sides in sections (1m intervals). Use crack-resistant tape to seal the sections. Control the pouring height of the potting compound so that its top surface is flush with the top surface of the side beam 1 to ensure the surface of the expansion joint is flat. After the potting compound has cured quickly, traffic can be opened, completing the installation of the expansion joint anti-blocking structure.

[0040] 2. When the height between the upper surface of the rubber waterstop and the top surface of the edge beam is no more than 4cm:

[0041] First, thoroughly clean the expansion joint, paying particular attention to removing dust, sand, and other debris from the surface of the rubber waterstop to ensure its cleanliness. Then, directly insert the self-adhesive crack-resistant tape into the gap between the two side beams 1, ensuring its bottom edge is above the rubber waterstop 3. Maintain a 5mm distance between the top surface of the crack-resistant tape on both sides and the top surface of the side beam 1, and firmly bond the crack-resistant tape to the inner surface of the side beam 1 on both sides. Next, pour the heated sealant in sections (1m intervals) from the center outwards, sealing each section with the crack-resistant tape. Ensure the top surface of the sealant is flush with the top surface of the side beam. After the sealant has cured, the construction of the expansion joint anti-blocking structure is complete, achieving effective protection for the expansion joint.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bridge expansion joint anti-clogging structure, comprising two side beams (1) located on both sides of the expansion joint, wherein a sealing groove (2) is provided on one opposite side of each of the two side beams (1), the sealing groove (2) extending along the length direction of the side beam (1), and a rubber waterstop (3) is inserted between the two opposite sealing grooves (2), characterized in that: A crack-resistant layer (4) is pasted between two opposing side beams (1). A sealant layer (5) is filled between the upper surface of the crack-resistant layer (4) and the side walls of the two side beams (1). When the height between the upper surface of the rubber waterstop (3) and the top surface of the side beam (1) is greater than 4cm, an elastic sealant material (6) is also filled between the lower surface of the crack-resistant layer (4) and the upper surface of the rubber waterstop (3).

2. The anti-clogging structure for bridge expansion joints according to claim 1, characterized in that: The crack-resistant layer (4) is a road-use self-adhesive crack-resistant adhesive.

3. The anti-clogging structure for bridge expansion joints according to claim 2, characterized in that: The distance between the top surface of the two sides of the crack-resistant layer (4) and the top surface of the side beam (1) is 3-7mm.

4. The anti-clogging structure for bridge expansion joints according to claim 1, characterized in that: The sealant layer (5) is made of potting compound.

5. The anti-clogging structure for bridge expansion joints according to claim 4, characterized in that: The top surface of the sealant layer (5) is flush with the top surface of the side beam (1).

6. The anti-clogging structure for bridge expansion joints according to claim 1, characterized in that: The elastic sealing material (6) is made of polystyrene, polyethylene foam or polypropylene foam.

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