Bridge expansion joint

Abstract

The utility model relates to a bridge expansion joint, include: two steel members, butt -joint structure includes a plurality of butt -joint board no.

Description

Technical Field

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

[0002] Bridge expansion joints are structures typically installed between the ends of two beams, between a beam end and an abutment, or at the hinged joints of a bridge to accommodate bridge deck deformation. They regulate the displacement and connection between the superstructure caused by vehicle loads and bridge construction materials, preventing the bridge from cracking or being damaged due to excessive deformation, and ensuring structural safety and driving comfort.

[0003] A search revealed a Chinese utility patent with publication number CN217948762U, entitled "An Irrigation Joint Structure for Bridges." Based on its accompanying drawings, it can be seen that some existing bridge expansion joints are designed with a connecting structure similar to a comb-type expansion joint, allowing for a smooth transition and stronger displacement capacity. However, in rainy environments, rainwater can directly pass through the joint, resulting in insufficient water-blocking performance. Furthermore, it primarily targets linear displacement (such as longitudinal expansion), and its adaptability to torsional demands (rotational or torsional deformation) is poor. Therefore, this paper proposes a new type of bridge expansion joint. Utility Model Content

[0004] Based on the above description, this utility model provides a bridge expansion joint, which solves the technical problems pointed out in the background art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A bridge expansion joint, comprising: Two steel components; The docking structure includes multiple docking plates 1 and multiple docking plates 2. An equal number of docking plates 1 and multiple docking plates 2 are integrally connected and installed on opposite sides of two steel components. The docking plates 1 and 2 on the outer side of each steel component are alternately arranged from top to bottom. The docking plate 1 on the outer side of any steel component is opposite to a docking plate 2 at the same horizontal height on another steel component. One side of the docking plate 1 is composed of alternating arc-shaped and straight surfaces, forming multiple linearly distributed docking teeth 1 and docking interfaces 1. Similarly, one side of the docking plate 2 is composed of alternating arc-shaped and straight surfaces, forming multiple linearly distributed docking teeth 2 and docking interfaces 2.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the number of docking plates one is two, and the number of docking plates two is two.

[0008] Furthermore, the first mating tooth is adapted to the second mating interface, and the second mating tooth is adapted to the first mating interface.

[0009] Furthermore, it also includes two sets of slotted parts and a water-blocking strip, wherein the water-blocking strip is disposed between the two sets of slotted parts.

[0010] Furthermore, the slot component includes a vertical part, and a horizontal part is integrally connected to the bottom of the vertical part on the side opposite to the steel component it is fixedly connected to. A hook part is integrally connected to the horizontal part. An installation port is formed between the vertical part, the horizontal part and the hook part. The water-blocking strip is installed between the two sets of slot components through the installation port, and the water-blocking strip is located below the docking structure.

[0011] Furthermore, the thickness of the first docking plate and the second docking plate are equal.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: In this bridge expansion joint, the two connecting plates on the outside of each steel component are alternately set from top to bottom, forming layers of barriers. The barrier effect increases the water flow path, slows down the amount of water entering, prevents excessive rainwater from entering, and provides a water barrier. The design of connecting teeth one, connecting interface one, connecting teeth two, and connecting interface two can take into account the needs of longitudinal expansion and torsional deformation. Attached Figure Description

[0013] Figure 1 A structural schematic diagram of a bridge expansion joint provided for an embodiment of this utility model; Figure 2 for Figure 1 A magnified view of a portion of region A in the middle; Figure 3 This is an exploded view of the docking structure in an embodiment of this utility model.

[0014] The attached diagram lists the components represented by each number as follows: 1. Steel components; 2. Butt joint structure; 21. Butt joint plate one; 211. Butt joint tooth one; 212. Butt joint interface one; 22. Butt joint plate two; 221. Butt joint tooth two; 222. Butt joint interface two; 3. Slotted components; 4. Water-blocking strip. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0016] like Figure 1-3 As shown in the figure, this embodiment provides a bridge expansion joint, which includes two symmetrical and spaced steel components 1 and a butt joint structure 2. The steel components 1 are made of Q345B low alloy steel and are hot-dip galvanized to improve corrosion resistance.

[0017] The following is a description of steel component 1 and connecting structure 2.

[0018] First, in practice, two steel components 1 are fixed in the reserved slots at the ends of the bridge, with the two facing each other. Both the bridge and the reserved slots are existing technologies and are not shown in the figure. A set of docking structures 2 is set between the two steel components 1 on opposite sides. The docking structure 2 includes multiple docking plates 1 21 and docking plates 22. The multiple docking plates 1 21 and multiple docking plates 22 are integrated and connected on opposite sides of the two steel components 1. For example, in the design, there are two docking plates 1 21 and two docking plates 22. Furthermore, the thickness of docking plates 1 21 and docking plates 22 is equal, and both are supported by high-strength alloy steel. It can be understood that the surface can be treated with anti-rust to ensure better application.

[0019] To further explain, the first docking plate 21 and the second docking plate 22 are arranged alternately on the side of the steel component 1, that is, the first docking plate 21 and the second docking plate 22 on the outer side of each steel component 1 are alternately set from top to bottom. Here, the outer side refers to the opposite side. At this time, the first docking plate 21 and the second docking plate 22 of the two steel components 1 are staggered in the horizontal direction. That is, the first docking plate 21 on the outer side of any steel component 1 is opposite to the second docking plate 22 at the same horizontal height on another steel component 1. Specifically, for example, the first docking plate 21 of the left steel component 1 is opposite to the second docking plate 22 at the same height on the right steel component 1.

[0020] like Figure 2 and 3 One side of the first docking plate 21 is composed of alternating curved and straight surfaces, forming multiple linearly distributed docking teeth 211 and docking interfaces 212. One side of the second docking plate 22 is composed of alternating curved and straight surfaces, forming multiple linearly distributed docking teeth 221 and docking interfaces 222. It should be noted that the first docking teeth 211 are adapted to the second docking interfaces 222, and the second docking teeth 221 are adapted to the first docking interfaces 212. The tooth grooves of the first docking plate 21 and the second docking plate 22 are precision formed by CNC milling to ensure the fitting accuracy. Furthermore, when viewed from above, the width of the first docking teeth 211 and the second docking teeth 221 gradually decreases on the side away from the corresponding steel component 1. This design allows the two steel components 1 to avoid misalignment during expansion, contraction, or torsion, and to adapt to the torsional deformation of the bridge.

[0021] Furthermore, when the above design is adopted, since the connecting plates 21 and 22 on the outer side of each steel component 1 are alternately set from top to bottom, the connecting teeth 221 of the connecting plate 22 are located below the connecting interface 212 of the connecting plate 21. In this way, layer by layer, a blocking effect is formed, which increases the water flow path, slows down the amount of water entering, avoids excessive rainwater entering, and prevents excessive water from seeping into the bridge bearings, piers, or beams through the expansion joints. This avoids the possibility of corrosion or concrete deterioration in hidden parts, affecting the overall stability. In addition, excessive water seepage into the expansion joints can cause internal steel corrosion, concrete carbonization, or expansion cracking, especially in saline environments, such as coastal areas or areas where de-icing agents are used, the corrosion rate will be significantly accelerated. Reducing water ingress can delay material aging and extend the structural life.

[0022] In addition, when the vehicle passes through the docking structure 2, the contact trajectory between the wheel and the seam is more continuous, which can reduce the "step effect" and bumpy feeling of traditional straight seams.

[0023] A bridge expansion joint also includes two sets of retaining grooves 3 and a water-blocking strip 4, with the water-blocking strip 4 disposed between the two sets of retaining grooves 3.

[0024] Further explanation: The slot 3 includes a vertical part, and a horizontal part is integrally connected to the bottom of the vertical part on the side opposite to the steel component 1 that is fixedly connected to it. A hook part is integrally connected to the horizontal part. An installation opening is formed between the vertical part, the horizontal part and the hook part. The water-blocking strip 4 is installed between the two sets of slot 3 through the installation opening, and the water-blocking strip 4 is positioned below the docking structure 2. At this time, since the water-blocking strip covers the gap below the docking structure 2, it effectively prevents rainwater from seeping down.

[0025] In summary, the design of the first mating tooth 211, the first mating interface 212, the second mating tooth 221, and the second mating interface 222 can take into account the requirements of longitudinal expansion and contraction and torsional deformation. The first mating plate 21 and the second mating plate 22 on the outer side of each steel component 1 are alternately set from top to bottom, forming layers of barriers. The barrier effect increases the water flow path, slows down the amount of water entering, avoids excessive rainwater entering, and provides a water barrier.

[0026] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A bridge expansion joint, characterized in that, include: Two steel components (1); The docking structure (2) includes multiple docking plates one (21) and multiple docking plates two (22). The multiple docking plates one (21) and multiple docking plates two (22) are connected in an integrated manner on the opposite side of two steel components (1). The docking plates one (21) and docking plates two (22) on the outside of each steel component (1) are arranged alternately from top to bottom. The docking plate one (21) on the outside of any steel component (1) is opposite to the docking plate two (22) at the same horizontal height on the other steel component (1). One side of the docking plate one (21) is composed of an interlaced arc surface and a straight surface, forming multiple linearly distributed docking teeth one (211) and docking interface one (212). One side of the docking plate two (22) is composed of an interlaced arc surface and a straight surface, forming multiple linearly distributed docking teeth two (221) and docking interface two (222).

2. A bridge expansion joint according to claim 1, characterised in that: The number of docking plates one (21) is two, and the number of docking plates two (22) is two.

3. A bridge expansion joint according to claim 2, characterised in that: The first mating tooth (211) is adapted to the second mating interface (222), and the second mating tooth (221) is adapted to the first mating interface (212).

4. A bridge expansion joint according to claim 3, characterised in that: It also includes two sets of slots (3) and a water-blocking strip (4), the water-blocking strip (4) being disposed between the two sets of slots (3).

5. A bridge expansion joint according to claim 4, wherein: The slot component (3) includes a vertical part, and a horizontal part is integrally connected to the bottom of the vertical part on the side opposite to the steel component (1) fixedly connected to it. A hook part is integrally connected to the horizontal part. An installation port is formed between the vertical part, the horizontal part and the hook part. The water-blocking strip (4) is installed between the two sets of slot components (3) through the installation port, and the water-blocking strip (4) is located below the docking structure (2).

6. A bridge expansion joint according to claim 1, characterized in that: The thickness of the first docking plate (21) and the second docking plate (22) are equal.

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