Whole arch precasted and floating chase erected continuous composite beam bridge closure method

Abstract

The invention discloses a method for joining a continuous composite beam bridge constructed through entire hole prefabrication and erection by floating. The method is to erect a composite beam section, which is formed by overlapping a channel steel beam provided with a surplus entire hole hoisting section in the manufacturing process at a prefabrication site and a concrete deck slab, on a pier top provided with two sliding pairs to be in a simple beam state, and simulate line platting correction, surplus cutting, precise contraposition, and welding of a welding seam to a butted joint of the beam ends through performing coarse contraposition on the cross sections of two adjacent composite beam ends so as to achieve the joining of the composite beam. The first sliding pair is arranged on a supporting padstone on the pier top to achieve the adjustment on the longitudinal and the transverse precise contrapositions; the second sliding pair is arranged on one side of the supporting padstone of the pier top to achieve the adjustment on the longitudinal, the transverse and the vertical precise contrapositions; and one end of the composite beam section is laid on the first sliding pair on the pier top, while the other end of the composite beam section is laid on the second sliding pair of an adjacent pier top. The method successfully solves the problems of high precision requirements and difficult construction for joining a large-scale continuous composite beam constructed through entire hole prefabrication and erection by floating.

Description

technical field [0001] The invention belongs to a bridge construction method, in particular to a continuous composite girder bridge closing method. Background technique [0002] At present, most of the continuous girder bridges that adopt integral prefabrication and overall erection in China are concrete continuous girder bridges, such as Donghai Bridge and Hangzhou Bay Bridge. The 70m concrete box girders of the Donghai Bridge and Hangzhou Bay Bridge are prefabricated and erected with multiple holes. The precision of the pier top closure is relatively low. The beam can be adjusted vertically, horizontally and vertically. As for steel-concrete composite beams, especially large-scale whole-hole prefabricated and floating erected continuous composite beams, due to the high precision requirements during construction, there is still no closing technology that can be used for reference. Contents of the invention [0003] The object of the present invention is to provide a con...

AI Technical Summary

Problems solved by technology

The 70m concrete box girders of the Donghai Bridge and Hangzhou Bay Bridge are prefabricated and erected with multiple holes. The precision of the pier top closure is relatively low. The beam can be adjusted vertically, horizontally and vertically

As for steel-concrete composite beams, especially large-scale whole-hole prefabricated continuous composite beams erected by floating transport, due to the high precision requirements during construction, there is still no closing technology that can be used for reference.

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