Transverse limiting device for curved steel box girder bridge

Abstract

The utility model relates to the technical field of steel box girder bridges, in particular to a transverse limiting device of a curved steel box girder bridge, which comprises a steel box girder bottom plate and a pier, a U-shaped limiting block is arranged on the pier, the bottom of the steel box girder bottom plate is fixedly connected with a connecting seat, the connecting seat is arranged in the U-shaped limiting block, and the U-shaped limiting block is fixedly connected with the bottom of the steel box girder bottom plate. Wedge-shaped grooves are formed in the two ends of the inner side of the U-shaped limiting block, and wedge blocks are arranged at the two ends, right opposite to the wedge-shaped grooves, of the connecting base; the connecting seat and the wedge blocks on the two sides are arranged at the bottom of the bottom plate of the steel box girder and are matched with the U-shaped limiting block and the wedge-shaped groove on the pier, so that the transverse displacement of the steel box girder can be effectively limited, and the stability of the bridge in the running process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel box girder bridges, and more specifically to a lateral limiting device for a curved steel box girder bridge. Background Art

[0002] At present, when vehicles pass through a curved bridge on an existing steel box girder bridge, the centrifugal force generated by the vehicles causes the beam body to be subjected to a lateral horizontal force. Since the steel box girder is lighter than the concrete beam, the beam body is prone to lateral slip. At the same time, for a curved steel box girder bridge, the inner and outer arc radii change under the action of the system temperature and the temperature difference between the inner and outer beams. Therefore, in addition to generating tangential displacement, the temperature change will also cause lateral displacement. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a lateral limiting device for a curved steel box girder bridge, which can effectively limit the lateral displacement of the steel box girder and improve the stability of the bridge during operation.

[0004] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0005] A lateral limiting device for a curved steel box girder bridge includes a steel box girder bottom plate and a bridge pier. A U-shaped limiting block is arranged on the bridge pier. A connecting seat is fixedly connected to the bottom of the steel box girder bottom plate. The connecting seat is arranged inside the U-shaped limiting block. Wedge-shaped grooves are opened at both inner ends of the U-shaped limiting block. Wedge blocks are arranged at both ends of the connecting seat opposite to the wedge-shaped grooves.

[0006] Furthermore, the contact surfaces of the wedge blocks and the wedge-shaped grooves are provided with textures or sawteeth.

[0007] Furthermore, the surface of the wedge-shaped groove is coated with a lubricant, and the lubricant is a graphite lubricant.

[0008] Furthermore, a guide rod is fixedly connected between both inner ends of the U-shaped limiting block, and the connecting seat is slidably sleeved on the guide rod.

[0009] Furthermore, both the connecting seat and the wedge blocks are made of tungsten carbide material.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] By arranging a connecting seat and wedge blocks on both sides at the bottom of the steel box girder bottom plate and cooperating with the U-shaped limiting block and the wedge-shaped grooves on the bridge pier, the utility model can effectively limit the lateral displacement of the steel box girder and improve the stability of the bridge during operation. Brief Description of the Drawings

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] 1. Steel box girder bottom plate; 2. Pier; 3. U-shaped limit block; 301. Wedge-shaped groove; 4. Connecting seat; 5. Wedge block; 6. Guide rod. Specific implementation manner

[0014] As Figure 1 shown, a lateral limit device for a curved steel box girder bridge includes a steel box girder bottom plate 1 and a pier 2, and is characterized in that: a U-shaped limit block 3 is arranged on the pier 2, a connecting seat 4 is fixedly connected to the bottom of the steel box girder bottom plate 1, the connecting seat 4 is arranged inside the U-shaped limit block 3, wedge-shaped grooves 301 are opened at both inner ends of the U-shaped limit block 3, and wedge blocks 5 are arranged at both ends of the connecting seat 4 opposite to the wedge-shaped grooves 301.

[0015] By arranging a connecting seat 4 and wedge blocks 5 on both sides at the bottom of the steel box girder bottom plate 1 of the present utility model, and cooperating with the U-shaped limit block 3 and the wedge-shaped grooves 301 on the pier 2, the lateral displacement of the steel box girder can be effectively restricted, and the stability of the bridge during operation can be improved.

[0016] Textures or serrations are arranged on the contact surfaces of the wedge blocks 5 and the wedge-shaped grooves 301; further increasing the friction force and enhancing the displacement limiting effect.

[0017] The surface of the wedge-shaped groove 301 is coated with a lubricant, and the lubricant is a graphite lubricant; graphite has a good layered structure, and the binding force between layers is weak. During the friction process, the graphite layers can slide relative to each other, thereby forming a lubricating film with low friction. This lubricating film can isolate the two friction surfaces, reduce direct contact and wear; the hardness of graphite is relatively low, and compared with metal parts, it is not easy to cause scratches and wear on the contact surface during the friction process; graphite has good thermal stability and thermal conductivity, and can effectively dissipate heat when heat is generated by friction, reduce the temperature of the friction surface, and reduce the material property changes and wear aggravation caused by high temperature; while the graphite lubricant provides a certain lubricating effect to reduce the wear of components, its own characteristics will not significantly reduce the normal friction effect required by the friction wedge blocks 5, thereby realizing improving the service life and reliability of components while ensuring the displacement limiting function.

[0018] A guide rod 6 is fixedly connected between both inner ends of the U-shaped limit block 3, and the connecting seat 4 is slidably sleeved on the guide rod 6; arranging the guide rod 6 ensures the accurate movement direction of the connecting seat 4 and the wedge blocks 5, and avoids deviation resulting in unstable friction effect.

[0019] Both the connecting seat 4 and the wedge blocks 5 are made of tungsten carbide material; tungsten carbide is a high-strength wear-resistant material, improving the service life of the device.

[0020] The basic principle, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A lateral limit device for a curved steel box girder bridge, comprising a steel box girder bottom plate (1) and a bridge pier (2), characterized in that: A U-shaped limit block (3) is arranged on the bridge pier (2); a connecting seat (4) is fixedly connected to the bottom of the steel box girder bottom plate (1); the connecting seat (4) is arranged in the U-shaped limit block (3); wedge-shaped grooves (301) are provided at both ends of the inner side of the U-shaped limit block (3); and wedge blocks (5) are arranged at both ends of the connecting seat (4) facing the wedge-shaped grooves (301).

2. The lateral limit device for a curved steel box girder bridge according to claim 1, characterized in that: The contact surfaces of the wedge block (5) and the wedge-shaped groove (301) are provided with textures or serrations.

3. The lateral limit device for a curved steel box girder bridge according to claim 2, characterized in that: The surface of the wedge-shaped groove (301) is coated with a lubricant, and the lubricant is a graphite lubricant.

4. The lateral limit device for a curved steel box girder bridge according to claim 1, characterized in that: A guide rod (6) is fixedly connected between the two inner ends of the U-shaped limiting block (3), and the connecting seat (4) is slidably sleeved on the guide rod (6).

5. The lateral limit device for a curved steel box girder bridge according to claim 1, characterized in that: The connecting seat (4) and the wedge block (5) are both made of tungsten carbide material.

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