Device for regulating cable force and elevation of sling of suspension bridge

Abstract

The invention belongs to a device for regulating a cable force and an elevation of a sling of a suspension bridge, which consists of a lifting structure, a supporting connection structure and a hydraulic system, wherein the supporting connection structure is used for being buckled with the sling fixed at the upper end of a sling cup ring and supporting a jack seat body of a center hole jack and consists of a supporting seat frame and a guide clamping cylinder; and the lifting structure is used for lifting and regulating the distance between a stiffening girder or a sling anchoring box fixed with the stiffening girder into one whole body and the lower end of the sling and consists of a lower lifting beam plate, an anchoring connector, the center hole jack and a lifting hanger rod. The device can be used for carrying out independent or integral regulation on the length and the cable force value of the sling and has the advantages of simple structure, flexibility for operation, safety, convenience and rapidness for operation, good use effect, high construction speed, high efficiency and high quality.

Description

technical field [0001] The invention belongs to a device for adjusting cable force and elevation of a suspension bridge. Background technique [0002] At present, suspension bridges and cable-stayed bridges have been widely used in bridge construction. During construction, first set up two main cables on both sides of the suspension bridge and the cable-stayed bridge. The upper end of the sling is fixed at a distance from the main cable. The anchor boxes at both ends are integrated into one. For example, the main span of Liujiaxia Suspension Bridge is 536 meters, and there are 65 pairs of slings in the middle of the span. The length of the cables varies from 48 meters to 2.2 meters. The stiffening girder and the orthotropic rigid bridge deck on it are installed symmetrically from the middle to both sides of the bridge tower by a cable crane. During the installation process, due to the change of the main cable shape and the influence of the section-by-section installation ...

AI Technical Summary

Problems solved by technology

[0003] However, it is very complicated to adjust the cable force and length of each sling of the suspension bridge. It is a high-altitude operation and the operation is difficult. Usually, it is necessary to install a temporary cable clamp on the main cable at the upper end of the adjusted sling, and use a tool to lift the cable. , jacks, etc. to complete the adjustment of the cable force and length of the sling on the catwalk of the main cable

Suspension bridges and cable-stayed bridges usually have dozens of pairs of slings. This method requires continuous installation and removal of temporary cable clamps. The construction speed is slow, the construction period is long, and the risk factor for workers during construction is high. Failure to meet the standard, often repeated adjustments, low efficiency, poor quality, affecting the progress of the project

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