A construction device for temporary vibration reduction of cable stays and its application method

Abstract

The invention relates to a construction device for temporary vibration reduction of a stay cable and a method for using the same, comprising a base fixedly connected to the bridge surface, a turnbuckle bolt fastened to the base, a damper threadedly connected to the turnbuckle bolt, and a buckle-connected bolt. The steel wire rope on the damper and the cable clamp sleeved on the stay cable, one end of the steel wire rope is hinged to the cable clamp, wherein the damper includes a shell, shear rubber, long screw and spring, and the shear rubber is placed in the shell, One end of the shearing rubber is fixedly connected with one end of the long screw, and the other end of the long screw protrudes out of the casing and is threadedly connected with the turnbuckle bolt; the other end of the shearing rubber is connected with one end of the spring, and the other end of the spring is fixedly connected with the casing. The vibration device effectively restrains the stay cables during the construction process, so as to achieve the purpose of vibration reduction of the stay cables, so that the stay cables can effectively restrain the adverse effects of the stay cables caused by wind vibration.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a construction device for temporary vibration reduction of stay cables and a method for using the same. Background technique [0002] The Pingtan Strait Road-Railway Bridge is the first cross-strait road-railway bridge in my country. The Strait Bridge is different from the Bay Bridge built in the past. Its construction faces harsh conditions such as strong winds, high waves, surges, strong typhoons, and complex geology. The construction of the bridge brought great challenges and high risks. This bridge is the first attempt in the field of cross-strait bridges in China. Whether it is the harshness of the environment, or the technical challenges and construction risks it faces, it is far superior to other cross-sea bridges that have been built or are under construction in China. The Pingtan Strait Highway-Railway Bridge is the first time in the world to build a Strait Bridge in...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of vibration suppression of the auxiliary cable at the cable end are as follows: 1. The effect of a single auxiliary cable to increase the low-order frequency of the main cable is limited, while the cost of multiple auxiliary cables is high; 2. Since the auxiliary cable is a rigid structure, the , the connection between the auxiliary cable and the main cable bears a lot of force, and it is easy to damage the PE protective layer of the main cable at the connection and loose the connection

[0006] The disadvantages of cable casing and wooden pads to suppress vibration are as follows: 1. With the increase of the vibration frequency of the cable, the amplitude becomes larger, and the wooden plug is easy to loosen, thus losing the vibration damping effect; 2. There is no guarantee The degree of clamping and clamping of each cable-stayed wooden block makes it difficult to control the construction quality and safety

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