A vibration-damping and noise-reducing bridge expansion joint device

Abstract

This utility model discloses a vibration-damping and noise-reducing bridge expansion joint device, belonging to the field of bridge construction technology. It includes adjacent beams with an asphalt pavement layer. Each beam end has a casting groove, and several supporting members are provided on the sidewalls of the casting grooves. A cross-joint plate extending into the casting groove is provided between the beams, and a metal mesh is provided on the cross-joint plate. A glass grid layer is provided on the metal mesh. Asphalt elastomer is poured into the casting groove. Its purpose is to solve the problems of existing technologies that have simple structures but insufficient deformation resistance and poor overall durability.

Description

Technical Field

[0001] This utility model belongs to the field of bridge construction technology, specifically relating to a vibration-damping and noise-reducing bridge expansion joint device. Background Technology

[0002] Seamless expansion joints are a common type of expansion joint structure. Their basic principle involves filling the gaps in the bridge deck with a highly elastic expansion material, integrating the bridge deck pavement at the expansion joint with other parts of the structure, thus providing a certain degree of elastic recovery. They are commonly used as expansion devices for small and medium-sized bridges. Seamless expansion joints offer good integrity, driving comfort, vibration reduction, and noise reduction. However, with existing asphalt seamless expansion joints, stress concentrates at the interface between the expansion joint and the original road surface during deformation, easily leading to delamination and cracking. To address these issues, existing patent CN201220222527.5 discloses a seamless expansion joint structure for concrete bridges, which avoids stress concentration at the expansion joint, prevents road surface cracking, and provides vibration reduction, noise reduction, and good driving comfort. While the structure of this patent is simple, its resistance to deformation is insufficient, resulting in poor overall durability. Summary of the Invention

[0003] In view of this, this utility model discloses a vibration-damping and noise-reducing bridge expansion joint device, which aims to solve the problems of existing technologies having simple structures but insufficient resistance to deformation and poor overall durability.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A vibration-damping and noise-reducing bridge expansion joint device includes adjacent beams with an asphalt pavement layer on each beam. Each beam end has a casting groove with several support members on its sidewall. A cross joint plate extending into the casting groove is provided between the beams. A metal mesh is provided on the cross joint plate, and a glass grid layer is provided on the metal mesh. Asphalt elastomer is poured into the casting groove.

[0006] In this scheme, after installing the joint plate, metal mesh and glass grid layer in sequence, the support members on the side wall of the pouring tank are installed, and then asphalt elastomer is poured into the pouring tank. After the asphalt elastomer solidifies, it forms an asphalt elastic layer, and the asphalt elastic layer is flush with the upper surface of the asphalt pavement layer.

[0007] Metal mesh is installed on the joint slab to enhance the load-bearing capacity of the seamless expansion joint. Simultaneously, asphalt elastomer is cast as the asphalt elastic layer, utilizing its self-flowing properties to achieve a smooth surface without the need for compaction, saving construction time. Furthermore, a glass grid layer enhances the high-temperature stability and deformation resistance of the asphalt elastic layer, improving the overall stability and deformation resistance of the expansion joint. Support components are also included to strengthen the connection between the asphalt elastic layer and the beam ends, preventing stress concentration at the interface between the expansion joint and the beam during deformation, which could lead to delamination and cracking of the expansion joint.

[0008] Furthermore, the sidewalls of the casting tank are provided with a plurality of spherical cavities. The support member includes a mounting ball rotatably disposed in the spherical cavity. An upwardly inclined support cylinder is fixed on the mounting ball. A support rod is slidably disposed coaxially at the end of each support cylinder. An elastic reset member is provided between the support cylinder and the support rod.

[0009] In this scheme, when the expansion joint is subjected to load, the middle part of the asphalt elastic layer deforms downward. Part of the deformation force acts on the support rod, causing the support rod to slide in the support sleeve and squeeze the elastic reset member. The elasticity of the elastic reset member acts in the opposite direction on the support rod to help the expansion joint restore its deformation.

[0010] Furthermore, the support rod has several protrusions on its periphery away from the end of the support cylinder.

[0011] Furthermore, the cross joint plate is provided with several reinforcing bars that extend upward through the metal mesh and glass grid.

[0012] Furthermore, the top of the asphalt elastic layer is provided with crushed stone.

[0013] Furthermore, the diameter of the crushed stone is 3-5 mm.

[0014] Other advantages, objectives, and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0015] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0018] The following are the markings in the attached diagram: 1. Beam body; 2. Asphalt pavement layer; 3. Casting groove; 4. Joint plate; 5. Metal mesh layer; 6. Glass grid layer; 7. Asphalt elastic layer; 8. Connecting ball; 9. Support cylinder; 10. Support rod; 11. Elastic reset element; 12. Reinforcing bar; 13. Protrusion. Detailed Implementation

[0019] like Figures 1-2 As shown:

[0020] A vibration-damping and noise-reducing bridge expansion joint device includes adjacent beams 1, on which an asphalt pavement layer 2 is provided; each end of the beam 1 is provided with a casting groove 3, and several support members are provided on the sidewalls of the casting groove 3; a cross joint plate 4 extending into the casting groove 3 is provided between the beams 1; a metal mesh is fixed on the cross joint plate 4; a glass grid layer 6 is provided on the metal mesh; and an asphalt elastic layer 7 is poured into the casting groove 3.

[0021] In this scheme, after installing the joint plate 4, metal mesh and glass grid layer 6 in sequence, the support is installed on the side wall of the pouring groove 3, and then asphalt elastomer is poured into the pouring groove 3. After the asphalt elastomer solidifies, it forms asphalt elastic layer 7, and asphalt elastic layer 7 is flush with the upper surface of asphalt pavement layer 2.

[0022] Metal mesh is installed on the joint plate 4 to enhance the load-bearing capacity of the seamless expansion joint. Simultaneously, asphalt elastomer is poured to form the asphalt elastic layer 7, which is smooth due to its self-flowing properties, eliminating the need for compaction and saving construction time. Furthermore, a glass grid layer 6 enhances the high-temperature stability and deformation resistance of the asphalt elastic layer 7, improving the overall stability and deformation resistance of the expansion joint. Support components are also included to strengthen the connection between the asphalt elastic layer 7 and the end of the beam 1, preventing stress concentration at the interface between the expansion joint and the beam 1 during deformation, which could lead to separation and cracking of the expansion joint from the beam 1.

[0023] In this embodiment, a plurality of spherical cavities are integrally cast on the side wall of the casting groove 3. The support member includes a mounting ball rotatably disposed in the spherical cavity. An upwardly inclined support cylinder 9 is welded and fixed on the mounting ball. A support rod 10 is slidably disposed coaxially at the end of each support cylinder 9. An elastic reset member 11 is disposed between the support cylinder 9 and the support rod 10.

[0024] In this scheme, when the expansion joint is subjected to load, the middle part of the asphalt elastic layer 7 has downward deformation, and part of the deformation force acts on the support rod 10, causing the support rod 10 to slide in the support sleeve and squeeze the elastic reset member 11. The elasticity of the elastic reset member 11 acts in the opposite direction on the support rod 10 to help the expansion joint restore its deformation.

[0025] In this embodiment, the support rod 10 has several protrusions 13 on the periphery of the end away from the support cylinder 9.

[0026] By setting several protrusions 13, the stability between the end of the support rod 10 and the asphalt elastic layer 7 is enhanced, preventing the end of the support rod 10 from separating from the asphalt elastic layer 7 and thus failing to assist the expansion joint in restoring its deformation.

[0027] In this embodiment, several reinforcing bars 12 are welded and fixed on the cross-slot plate 4, extending upward through the metal mesh and glass grid.

[0028] By adding 12 reinforcing bars, the overall stability of the expansion joint is further enhanced.

[0029] In this embodiment, the top of the asphalt elastic layer 7 is covered with several crushed stones.

[0030] By laying crushed stone on top of the asphalt elastic layer 7, the anti-slip performance of the expansion joint surface is enhanced.

[0031] In this embodiment, the diameter of the crushed stone is 3-5 mm.

[0032] Limit the diameter of the crushed stone to avoid it being too small, resulting in poor anti-slip performance; and also to avoid it being too large, resulting in poor smoothness of the expansion joint surface.

[0033] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A vibration-damping and noise-reducing bridge expansion joint device, characterized in that: The system includes adjacent beams, on which an asphalt pavement layer is provided; each beam end is provided with a casting groove, and each casting groove sidewall is provided with several support members; a cross joint plate extending into the casting groove is provided between the beams, and a metal mesh is provided on the cross joint plate, and a glass grid layer is provided on each metal mesh; asphalt elastomer is poured into the casting groove.

2. The vibration-damping and noise-reducing bridge expansion joint device according to claim 1, characterized in that: The sidewalls of the casting tank are provided with a number of spherical cavities. The support includes a mounting ball rotatably disposed in the spherical cavity. An upwardly inclined support cylinder is fixed on the mounting ball. A support rod is slidably disposed coaxially at the end of each support cylinder. An elastic reset member is provided between the support cylinder and the support rod.

3. The vibration-damping and noise-reducing bridge expansion joint device according to claim 2, characterized in that: The support rod has several protrusions on its periphery at the end away from the support cylinder.

4. The vibration-damping and noise-reducing bridge expansion joint device according to claim 3, characterized in that: The cross joint plate is provided with several steel bars that extend upward through the metal mesh and glass grid.

5. The vibration-damping and noise-reducing bridge expansion joint device according to claim 4, characterized in that: The top of the asphalt elastomer is provided with crushed stone.

6. The vibration-damping and noise-reducing bridge expansion joint device according to claim 5, characterized in that: The diameter of the crushed stone is 3-5 mm.

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