Construction method of quick replacement of suspension rods of mid-through and through arch bridges

Abstract

The invention discloses a quick replacement construction method of a halfway through arch bridge and a lower through arch bridge suspender, which comprises the following steps of: 1, installing an operation platform to prepare for measuring and monitoring; 2, installing a temporary pocket suspension system; 3, tensiong the temporary pocket suspension system to cut off the old boom; 4, removing that old boom; 5, installing and tensioning that new boom to realize the replacement of the boom; 6, removing the temporary hoisting system and adjust the cable force of the new boom. The construction method can achieve the purpose of quickly replacing the old boom under the condition of less investment of temporary boom, operators and machinery, especially in the early replacement construction of mid-through and through arch bridge boom which is suitable for anchoring the boom on the arch rib or cross beam, and the construction method is more efficient.

Description

technical field [0001] The invention relates to a method for replacing suspenders of arch bridges, in particular to a construction method for quickly replacing suspenders of a mid-support type and a bottom-support type arch bridge. Background technique [0002] Due to the beautiful shape and large spanning capacity of the boom arch bridge, it is generally built on urban roads, becoming a beautiful landscape of the city and enhancing the image of the city. However, the urban roads are densely packed with traffic and the driving lanes are limited. Generally, the replacement of booms requires the whole bridge to be closed or closed. Some lanes have a greater impact on the lives of citizens. In order to reduce the impact on traffic, the general competent department has strict requirements on the construction period. [0003] In the design and construction of the early intermediate-supported and under-supported arch bridges, the suspenders were anchored to the arch ribs or beams...

AI Technical Summary

Problems solved by technology

[0003] In the design and construction of the early intermediate-supported and under-supported arch bridges, the suspenders were anchored to the arch ribs or beams. This anchoring form was based on the limitations of the technology at the time and the short-term maintenance and replacement. Eliminate the corrosion of the exposed suspender steel wires of the arch rib and beam, and at the same time make the suspender, arch rib and beam part form a unified rigid body, improve its integrity, and increase the anchoring force of the suspender, arch rib and beam, but cause There are many factors affecting the replacement of booms in the later stage, high technical requirements, complex construction technology, and difficult replacement, resulting in low replacement efficiency. According to the technical characteristics of boom replacement at the present stage, if we want to speed up the progress of boom replacement, there is and only a temporary increase in investment. It is not only a waste, but also the replacement of multiple booms at the same time will lead to more complicated structural forces and increase the risk of boom replacement

Images