Lifting and Floating Demolition Method of Bailey Beam Temporary Support at the Bottom of Cross-river Bridge

Abstract

The invention discloses a river-crossing bridge bottom bailey beam temporary support jacking, floating transporting and detaching method. Jacking supporting frames are erected on two barges which arelocated at the bottoms of bailey beams, stored water of the barges is discharged, so that hulls float up, and therefore the bailey beams with top bearing beams and frame detaching sand boxes detachedin advance are supported out of touch through the jacking supporting frames; the bailey beams in the out-of-touch state are born and cut jointly through the two barges to get away from the bottom of asteel beam to the set hoisting positions, and jacking and floating transportation conducted through the barges are achieved; and the bailey beams are integrally hoisted to a bank temporary wharf through a floating crane, and integral hoisting of the floating crane is achieved. The method is suitable for detaching river-crossing bridge bottom bailey beam temporary supports, the detaching construction speed is high, the detaching process is high in safety, the river channel navigation closure time is short, and influence of support detaching construction on river channel navigation is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of demolition of a temporary support structure for bridge construction, and more specifically relates to a construction method for lifting, floating, transporting and dismantling a temporary support of a large-span Bailey beam at the bottom of a bridge crossing a river. Background technique [0002] With the rapid development of bridge construction level, it is more and more common to use bracket method for bridge construction, and the construction method is becoming more and more mature. The combined support of steel pipe column and Bailey beam or section steel is one of the common temporary support structures. Due to the limited space at the bottom of the bridge, large-scale lifting equipment cannot be used for operations. Taking the combined support of steel pipe columns and Bailey beams as an example, the traditional method of removing the Bailey beams is to first break up and separate the Bailey beam gr...

AI Technical Summary

Problems solved by technology

Due to the limited space at the bottom of the bridge, large-scale lifting equipment cannot be used for operations. Taking the combined support of steel pipe columns and Bailey beams as an example, the traditional method of removing the Bailey beams is to first break up and separate the Bailey beam groups, and then disassemble the Bailey beams. Divided into several truss pieces, and then exported and hoisted ashore one by one. However, this demolition method has low construction efficiency, takes a long time to occupy the waterway, and has high construction costs and safety risks.

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