Cantilever construction method for bearing part of bottom plate weight by utilizing corrugated steel webs

Abstract

The invention discloses a cantilever construction method for bearing a part of bottom plate weight by using corrugated steel webs. The method comprises the following steps of after 0# blocks are constructed, assembling a hanging basket; after the corrugated steel webs of a 1# block are installed in place, arranging a support between the corrugated steel webs; releasing anchoring of the hanging basket, pushing forwards, pushing a front hanging belt of the hanging basket to front ends of the corrugated steel webs, and fixing a front supporting point and a rear supporting point of the hanging basket; adjusting a top plate template and a bottom plate template, binding top plate reinforcing steel bars and bottom plate reinforcing steel bars, and enabling end templates of the top plate and the bottom plate to be away from the front end of the corrugated steel web of the section; pouring concrete of the top plate and the bottom plate, and after a strength requirement is met, tensioning a prestressed tendon; and cycling from a second step to a fifth step, and realizing construction of the next section. The hanging basket is improved on the basis of an existing rhombic hanging basket. One end of hanging basket part front suspension is anchored to a hanging belt clamping piece, the other end is anchored to a hanging basket lower longitudinal beam, and the corrugated steel webs are used for bearing a part of the weight of the bottom plate. And the rear supporting point of the hanging basket is anchored on the previous top plate. A length of a cantilever pouring section can be increased, and hanging basket post-anchoring is reduced.

Description

technical field [0001] The invention relates to the technical field of bridge construction with corrugated steel webs, in particular to a cantilever construction method in which corrugated steel webs bear part of the weight of a bottom plate. Background technique [0002] Currently, the most commonly used construction method for corrugated steel web composite bridges is the same cantilever casting method as for concrete box girder bridges. For corrugated steel web composite bridges, the top and bottom slabs need to be poured separately, the construction work area is small, and the construction period is long. If the construction section is lengthened, the weight of a single section will increase significantly, and the requirements for the hanging basket are high. [0003] The asynchronous pouring construction method developed for the corrugated steel web composite bridge supports the entire hanging basket on the steel web of the current section, and fully uses the corrugate...

AI Technical Summary

Problems solved by technology

At the same time, it is also prone to the problem of concrete stress concentration at the front end of the cantilever

In addition, the use of asynchronous pouring construction method requires the development of a new independent form of supporting construction hanging basket, and the technical operation is complicated

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