Construction method for dismantling wide continuous beam over railway business line

Abstract

The invention discloses a construction method for dismantling a wide continuous beam over a railway business line, the method comprises the following steps: integrally hoisting and dismantling a beam body over a railway section by using a bridge girder erection machine, reasonably arranging bridge girder erection machine fulcrums on site by using the existing bridge girder erection machine, and cutting and separating the existing beam body in a railway business line blocking point by using a rope saw, and hoisting and disassembling the whole beam body according to the inverted sequence operation of the beam erecting procedure. The construction method is simple in construction process, the defects of a traditional construction technology are overcome, the railway business line blocking frequency is small, after the railway crossing part on the continuous beam is cut, the blocked line can be disassembled at a time, the influence on operation of the railway business line is reduced, the driving risk of the railway business line is reduced, the construction period is shortened, the construction process is safe and efficient, and the construction cost is reduced.

Description

technical field [0001] The invention relates to a construction method for dismantling a wide-width continuous beam on a railway business line, and belongs to the technical field of bridge construction. Background technique [0002] The demolition of existing bridges on overspan electrified railways is a common heavy and difficult project in highway reconstruction and expansion projects, especially the demolition of existing wide continuous beams. The traditional construction method is to first set up a temporary fulcrum, lift the existing beam body to meet the safety distance of the catenary, then set up the support and protective shed, cut the beam body into pieces and lift it off. There are problems with this construction method: first, the construction workload is large, and before the protective support system is erected and the bridge is demolished, the existing bridge jacking construction must be carried out first; The protective support system needs to block the main...

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Problems solved by technology

There are problems with this construction method: first, the construction workload is large, and before the protective support system is erected and the bridge is demolished, the existing bridge jacking construction must be carried out first; The protective support system needs to block the main points of the line for multiple constructions; third, the removal of the continuous girder of the existing bridge needs to be divided into small pieces to cut the roof and web of the girder body for multiple key constructions, which has a high impact on the safety of the existing railway traffic and the construction process is complicated

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