Cantilever assembling construction process for double-U-box type composite variable cross-section segment assembled continuous beam bridge

Abstract

The invention relates to a cantilever assembly construction process for a double-U-box type composite variable cross-section segment assembled continuous beam bridge, and belongs to the technical field of rail transit construction processes. The construction process comprises the steps of S1) conducting construction preparation, specifically, consolidating a cast-in-place 0# section beam pier, assembling and debugging a suspension splicing hoisting machine, and checking and accepting the beam section segments after leaving the factory; S2) conducting assembly according to a section beam segment cantilever balance method, specifically, carrying out cantilever symmetrical assembly on the two sides of the consolidated 0# section beam pier, and realizing rapid adjustment of the special-shapedeccentric section beam segment in the three-dimensional direction in the air; S3) conducting side span section beam segment semi-cantilever assembly, specifically, adopting a support method for side span section beam segment semi-cantilever assembly, and S4, conducting closure section construction, specifically, conducting closure under the assistance of a stiff framework, firstly conducting sidespan, then conducting mid-span, and finally completing bridge forming system conversion of the continuous beam bridge through permanent prestressed tendons of span joints.

Description

technical field [0001] The invention relates to the technical field of rail transit construction technology, in particular to the cantilever assembly construction technology of a double-U box-type compound variable cross-section section assembled continuous beam bridge. Background technique [0002] U-shaped beam is the most novel type of viaduct bridge used in urban rail transit. It has the characteristics of good noise reduction effect, low building height, high space utilization rate, and beautiful appearance. Factors such as small diameter, complex force, cumbersome production, and difficult construction restrict its wide-scale promotion and use. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the present invention provides a cantilever assembling construction technique for segmentally assembled continuous girder bridges of double U box type compound variable section. [0004] The technical solution of the present invention...

AI Technical Summary

Problems solved by technology

[0002] U-shaped beam is the most novel type of viaduct bridge used in urban rail transit. It has the characteristics of good noise reduction effect, low building height, high space utilization rate, and beautiful appearance. Factors such as small diameter, complex force, cumbersome production, and difficult construction restrict its wide-scale promotion and use.