Bridge deck crane combined hoisting construction method for closure section of steel-concrete composite beam cable-stayed bridge

Abstract

The invention relates to a combined hoisting construction method for deck cranes for a closure section of a steel-concrete composite beam cable-stayed bridge. The combined hoisting construction methodcomprises the steps that (1) the deck cranes on the two sides walk in place and complete anchoring; 2) a load distribution device is installed on the deck crane; 3) the hoisting system is mounted onthe load distribution device, and the position of a hoisting point is adjusted according to the size of the closure section; (4) before the closure section is hoisted, the elevations of the sections on the two sides of the bridge are adjusted to be consistent by applying pressure or adjusting stay cables; 5) the closure section is hoisted by using a hoisting system; and (6) after the position of the closure section is accurately adjusted and the site temperature and the structural distance meet the closure condition, the closure section is hoisted in place, and closure is completed after locking. The method is suitable for the working condition that the closure section is small in length and cannot be directly hoisted through the bridge deck cranes on the two sides in a combined mode, theconstruction process is safe and reliable, it is guaranteed that loads on the two sides of a bridge are basically kept consistent in the closure section hoisting process, the hoisting in-place precision can be guaranteed, and the construction cost is saved.

Description

technical field [0001] The invention relates to a bridge deck hoisting construction method for a closing section of a bridge, in particular to a bridge deck crane combined hoisting construction method for a closing section of a steel-concrete composite girder cable-stayed bridge. Background technique [0002] For the hoisting of the closing section of the steel-concrete composite girder cable-stayed bridge, if the section length of the closing section is sufficient, the bridge deck cranes on both sides can be directly combined for lifting. For bridges with short closing lengths, since they cannot be lifted directly, they are generally hoisted by a single-side deck crane, which may easily cause large load deviations at both ends of the closing mouth, resulting in inconsistent elevations of the closing mouth. To solve this problem, the bridge elevation is generally adjusted by adjusting the cable force and hoisting the side load on a non-deck crane. The implementation of this...

AI Technical Summary

Problems solved by technology

The implementation of this method is cumbersome, the construction efficiency is low, and it cannot ensure the high precision of the closing mouth. At the same time, it will cause a large deviation of the cable force at both ends of the closing mouth, which will affect the future cable adjustment of the whole bridge.

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