Quick beam lowering method based on bridge synchronous jacking and overall replacement

Abstract

The invention discloses a quick beam lowering method based on bridge synchronous jacking and overall replacement. The method is characterized by comprising the following steps: adopting an all-in-one machine for bearing, transporting and supporting to lower and place the whole bridge onto a sub column and a parent column at the top of which a synchronous jacking device is mounted, wherein the sub column and the parent column all adopt a multi-section steel column butting structure, and cushion pads are arranged at the upper parts of the sub column and the parent column; performing synchronous lowering for the whole bridge through alternately adjusting the heights of the sub column and the parent column and utilizing the synchronous jacking device arranged at the top of the parent column. The method provided by the invention is simple, effective and fast, is high in safety, and adopts stable and simple beam lowering device so as to quickly achieve stable and gradual lowering of the whole bridge, and reduce the potential safety hazard of construction labor intensity on the crushing facility and the site.

Description

technical field [0001] The invention belongs to the handling and disposal technology of old bridges to be disposed in bridge overall replacement, and specifically relates to a rapid beam-lowering method based on synchronous lifting of the bridge and lowering the old bridge to the processing position in the overall replacement project. Background technique [0002] With a large number of facts about the reconstruction of old bridges in our country, the timely reconstruction of bridges with diseases or damages after demolition has become an important research topic of construction. For the demolition of bridges on main passages or important roads, especially the crossing areas involving various types of traffic passages, on-site demolition or fragmentation cannot be carried out, because the existing environment and site cannot meet the long-term construction requirements, and temporary construction Or the construction of prefabricated bridges cannot meet the site and site crus...

AI Technical Summary

Problems solved by technology

However, the carrying height of the bridge on the all-in-one machine is relatively high, and the bridge needs to be stably lowered to the demolition height at the demolition site. However, if the bridge with a large weight cannot be stably controlled during the lowering process, there will be safety hazards such as tilting and overturning. Hidden dangers, a more stable beam lowering operation is required

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