A bridge expansion joint

Abstract

This utility model relates to a bridge expansion joint, comprising: a crossbeam; a central beam, located at the top center of the crossbeam, with a connecting part I integrally connected to both sides of the central beam; and two sets of side beams, spaced apart from the central beam and symmetrically distributed on both sides of the central beam, with a connecting part II integrally connected to the opposite side of each of the two sets of side beams; the side of the connecting part I near the adjacent side beam is composed of alternating arc-shaped and straight surfaces, forming multiple linearly distributed connecting teeth I and connecting interfaces I. This bridge expansion joint, with its arc-shaped design of connecting parts I and II, disperses lateral and torsional deformation stresses, while the alternating arc-shaped and straight surface design prevents the linkage deformation between the arches formed by the arc-shaped surfaces, avoiding the problem of excessive overall flexibility caused by continuous arcs. Furthermore, when vehicles pass through connecting parts I and II, the contact trajectory between the wheels and the joint is more continuous, reducing the "step effect" and bumpy feeling of traditional straight joints.

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] In existing technologies, bridge expansion joints are of the form of straight-line joints. When a vehicle passes through the joint, the wheel comes into contact with the joint, which will produce a "step effect" and a bumpy feeling. If the bumpy feeling is too strong, it will bring a bad driving experience. Therefore, a new type of bridge expansion joint is proposed. 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:

[0006] beam;

[0007] The central beam is located at the top center of the crossbeam, and there are integral connecting parts on both the left and right sides of the central beam.

[0008] Two sets of side beams are spaced apart from the middle beam and symmetrically distributed on both sides of the middle beam. On the opposite side of each set of side beams, there is an integrally connected joint.

[0009] The first docking part is composed of alternating arc-shaped and straight surfaces on the side closest to the adjacent side beam, forming multiple linearly distributed docking teeth and docking interfaces. The second docking part is composed of alternating arc-shaped and straight surfaces on the side closest to the middle beam, forming multiple linearly distributed docking teeth and docking interfaces.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the bottom surface of the side beam is attached to the upper surface of the crossbeam, and a filling space is formed between the middle beam and the side beam, with polyurethane disposed in the filling space.

[0012] Furthermore, the first mating tooth is adapted to the second mating interface, and the second mating tooth is adapted to the first mating interface.

[0013] Furthermore, multiple reinforcing ribs are fixed on the side of the side beam near the middle beam, and the connecting teeth are located on top of the reinforcing ribs.

[0014] Furthermore, a plurality of reinforcing ribs are fixed on one side of the middle beam near the side beam, and the first connecting tooth is located on top of the second reinforcing rib.

[0015] Furthermore, the second reinforcing rib has a waist hole on its side, the first reinforcing rib has a through hole on its side, and the bridge expansion joint also includes a third reinforcing rib. The third reinforcing rib passes through all the through holes and waist holes, the third reinforcing rib is fixedly connected to the first reinforcing rib, and the third reinforcing rib is slidably connected to the inside of the waist hole.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0017] 1. The bridge expansion joint is designed with two connecting parts, one and the other. The arc design disperses the lateral and torsional deformation stress. In the design of the interlacing arc and straight surfaces, the straight sections prevent the linkage deformation between the arches formed by the arc surfaces, avoiding the problem of excessive overall flexibility caused by continuous arcs. When vehicles pass through connecting parts one and two, the contact trajectory between the wheels and the joint is more continuous, reducing the "step effect" and bumpy feeling of traditional straight joints.

[0018] 2. The expansion joint of this bridge has two sets of side beams and middle beams forming two grooves, which can meet the displacement requirements on both sides, thus accommodating large displacement deformation. Attached Figure Description

[0019] Figure 1 A structural schematic diagram of a bridge expansion joint provided for an embodiment of this utility model;

[0020] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle;

[0021] Figure 3 This is a schematic diagram of the mating tooth and its connection structure in an embodiment of this utility model.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Crossbeam; 2. Middle beam; 21. Butt joint tooth one; 22. Butt joint one; 23. Reinforcing rib two; 24. Waist hole; 25. Reinforcing rib three; 3. Side beam; 31. Butt joint tooth two; 32. Butt joint two; 33. Reinforcing rib one; 4. Polyurethane. Detailed Implementation

[0024] 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.

[0025] like Figure 1-3 As shown, a bridge expansion joint in this embodiment includes a crossbeam 1, a middle beam 2, side beams 3, and a reinforcing rib assembly. The middle beam 2 is located at the top center of the crossbeam 1. A first connecting part is integrally connected to both the left and right sides of the middle beam 2. Two sets of side beams 3 are spaced apart from the middle beam 2 and symmetrically distributed on both sides of the middle beam 2. A second connecting part is integrally connected to the opposite side of each set of side beams 3. The core improvement lies in the design of staggered connecting teeth and connecting interfaces, combined with the reinforcing rib assembly to enhance the load-bearing capacity, meet the expansion and contraction deformation requirements of the expansion joint, have multi-directional displacement compatibility, and make the contact trajectory between the wheel and the joint more continuous, reducing the "step effect" and bumpy feeling of traditional straight joints, and improving driving comfort.

[0026] It should be noted that, in addition, the bottom surface of the side beam 3 is attached to the upper surface of the cross beam 1, and its structural strength is excellent. A filling space is formed between the middle beam 2 and the side beam 3. The filling space is filled with polyurethane 4, which serves to meet the functions of expansion and contraction deformation and waterproofing and dustproofing. The integrated connection design of the first connecting part and the middle beam 2, as well as the integrated connection design of the second connecting part and the side beam 3, do not require welding.

[0027] In the above, the crossbeam 1 serves as the basic support structure and is horizontally fixed at the end of the bridge. The middle beam 2 is vertically welded to the top center of the crossbeam 1, serving as the central reference for the expansion joint. There are two sets of side beams 3, which are symmetrically distributed on both sides of the middle beam 2, maintaining a certain distance from the middle beam 2 to form the main frame of the expansion joint. With this design, the two sets of side beams 3 and the middle beam 2 form two grooves, which can meet the displacement requirements on both sides, thereby satisfying larger displacement deformation.

[0028] The first and second docking sections are designed to improve driving comfort and reduce bumps. The side of the first docking section near the adjacent side beam 3 is composed of alternating curved and straight surfaces, forming multiple linearly distributed docking teeth 21 and mating interfaces 22. The side of the second docking section near the middle beam 2 is composed of alternating curved and straight surfaces, forming multiple linearly distributed docking teeth 31 and mating interfaces 32. The curved design disperses lateral and torsional deformation stress, while the straight sections in the alternating design of curved and straight surfaces prevent the linkage deformation between the arches formed by the curved surfaces, avoiding the problem of excessive overall flexibility caused by continuous curved surfaces.

[0029] It should be noted that mating tooth 21 is compatible with mating interface 32, and mating tooth 31 is compatible with mating interface 22.

[0030] Since the design of docking parts one and two will be responsible for contact with the tire, a reinforcing rib assembly is designed to enhance their load-bearing capacity. Specifically, it consists of reinforcing rib one 33, reinforcing rib two 23, and reinforcing rib three 25. To further explain, multiple reinforcing ribs one 33 are fixed on the side beam 3 near the middle beam 2, and docking teeth two 31 are located on top of reinforcing rib one 33. Multiple reinforcing ribs two 23 are fixed on the side beam 2 near the side beam 3, and docking teeth one 21 are located on top of reinforcing rib two 23.

[0031] Alternatively, in one embodiment, the side of the second reinforcing rib 23 is provided with a waist hole 24, and the side of the first reinforcing rib 33 is provided with a through hole. The bridge expansion joint also includes a third reinforcing rib 25, which passes through all the through holes and waist holes 24. The third reinforcing rib 25 is fixedly connected to the first reinforcing rib 33 and is slidably connected to the inside of the waist hole 24. With this design, the sliding relationship between the third reinforcing rib 25 and the waist hole 24 can meet the displacement requirements of the side beam 3 near the middle beam 2. In addition, for example, when the second connecting tooth 31 bears pressure, it will press down on the first reinforcing rib 33, and the third reinforcing rib 25 can allow the second reinforcing rib 23 to share this downward pressure. Conversely, when the first connecting tooth 21 is compressed, the first reinforcing rib 33 can also share the force.

[0032] In summary, the design of docking section one and docking section two features an arc-shaped design that disperses lateral and torsional deformation stress. In the design of the interlacing arc-shaped and straight-line surfaces, the straight-line segments prevent the linkage deformation between the arches formed by the arc-shaped surfaces, avoiding the problem of excessive overall flexibility caused by continuous arcs. Furthermore, when vehicles pass through docking section one and docking section two, the contact trajectory between the wheels and the joints can be more continuous, reducing the "step effect" and bumpy feeling of traditional straight-line joints.

[0033] 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: Crossbeam (1); The middle beam (2) is set at the top center of the cross beam (1), and the left and right sides of the middle beam (2) are integrally connected with a connecting part; Two sets of side beams (3) are spaced apart from the middle beam (2) and symmetrically distributed on both sides of the middle beam (2). On the opposite side of the two sets of side beams (3), there is an integrally connected joint part 2. The side of the first docking part near the adjacent side beam (3) is composed of an alternating arc surface and a straight surface, forming multiple linearly distributed docking teeth (21) and docking interfaces (22). The side of the second docking part near the middle beam (2) is composed of an alternating arc surface and a straight surface, forming multiple linearly distributed docking teeth (31) and docking interfaces (32).

2. A bridge expansion joint according to claim 1, characterised in that: The bottom surface of the side beam (3) is attached to the upper surface of the cross beam (1), and a filling space is formed between the middle beam (2) and the side beam (3), and polyurethane (4) is provided in the filling space.

3. A bridge expansion joint according to claim 2, characterized in that: The first mating tooth (21) is adapted to the second mating interface (32), and the second mating tooth (31) is adapted to the first mating interface (22).

4. A bridge expansion joint according to claim 3, characterized in that: The side beam (3) is fixed with multiple reinforcing ribs (33) on the side near the middle beam (2), and the connecting teeth (31) are located on top of the reinforcing ribs (33).

5. A bridge expansion joint according to claim 4, characterized in that: The middle beam (2) is fixed with a plurality of reinforcing ribs (23) on the side near the side beam (3), and the mating tooth (21) is located on top of the reinforcing rib (23).

6. A bridge expansion joint according to claim 5, characterized in that: The side of the second reinforcing rib (23) is provided with a waist hole (24), the side of the first reinforcing rib (33) is provided with a through hole, and the bridge expansion joint also includes a third reinforcing rib (25). The third reinforcing rib (25) passes through all the through holes and waist holes (24). The third reinforcing rib (25) is fixedly connected to the first reinforcing rib (33), and the third reinforcing rib (25) is slidably connected to the inside of the waist hole (24).

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