Cantilever casting asynchronous construction method for corrugated steel web continuous box girder bridge segments

Abstract

The invention provides a corrugated steel web continuous box girder bridge section suspended casting asynchronous construction method which comprises the following steps: after a 0 # section is cast in place, lifting a 1 # section U-shaped prefabricated structure to a 0 # section cantilever, and reinforcing and welding; then wet joints and bottom plate concrete pouring construction at the residual height are carried out; then 1 # section top plate concrete is poured; then, a second section U-shaped prefabricated structure is lifted to the position of a first section cantilever, corrugated steel webs on the two sides are welded, and wet joints and bottom plate concrete pouring construction at the remaining height are conducted; and construction of other sections is circularly conducted, remaining construction is completed till the whole bridge is closed, and prestress tensioning is conducted after the whole bridge is closed. A cast-in-place concrete bottom plate is replaced with the semi-prefabricated assembly type bottom plate, an asynchronous construction method is adopted, a plurality of working faces are added, the engineering period is effectively shortened, in addition, high-altitude construction work can be effectively reduced through prefabricated assembly type construction, the construction safety risk is reduced, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a section cantilever asynchronous construction method of a continuous box girder bridge with corrugated steel webs. Background technique [0002] The corrugated steel web concrete composite girder bridge uses steel web instead of concrete web, which is a new type of steel-concrete composite structure. During construction, box girder bridges with corrugated steel webs usually adopt the construction methods of traditional concrete bridges, such as cast-in-place construction of brackets, cantilever pouring, and push-push construction. Most of the cantilever pouring of corrugated steel web box girder bridges in the prior art is constructed by hanging baskets. During the construction process, the installation of hanging baskets is cumbersome, the economic cost is high, the construction period is long, and problems such as great difficulty need to be solved urge...

AI Technical Summary

Problems solved by technology

During construction, box girder bridges with corrugated steel webs usually adopt the construction methods of traditional concrete bridges, such as cast-in-place construction of brackets, cantilever pouring, and push-push construction. Most of the cantilever pouring of corrugated steel web box girder bridges in the prior art is constructed by hanging baskets. During the construction process, the installation of hanging baskets is cumbersome, the economic cost is high, the construction period is long, and problems such as great difficulty need to be solved urgently

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