Construction method of asynchronous hanging basket for cast-in-place cantilever box girder with corrugated steel web

Abstract

The invention relates to the field of bridge construction, in particular to a construction method for asynchronous hanging baskets of cast-in-place cantilever box girders with corrugated steel webs, comprising the following steps: (1) pouring concrete for the top plate of the N-1 segment and the bottom plate of the N segment; 2) When the concrete strength of the roof of the N-1 section reaches 60% of the design strength, the first prestressed tension of the roof of the N-1 section is carried out; (3) The corrugated steel web of the N+1 section is installed, Walk on the hanging basket to the N+1 segment, and bind the bottom plate reinforcement of the N+1 segment; (4) carry out the second prestressed tensioning and grouting of the roof of the N‑1 segment; (5) bind the N segment Roof reinforcement, for the next section of the cycle. The asynchronous hanging basket construction of the present invention divides the prestressed tension into two tensions, and carries out the construction of different processes in the two tensions, shortening the segmental construction period and reducing the time cost under the premise of ensuring the quality and safety of the project. At the same time improve the efficiency of construction work.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a construction method for asynchronous hanging baskets of cast-in-place cantilever box girders with corrugated steel webs. Background technique [0002] The corrugated steel web replaces the concrete web to form a new type of composite bridge structure. The steel structure is used to bear the load on the web, which has many advantages such as light weight, good seismic performance, high prestressing efficiency of the top and bottom plates, and strong shear resistance. . In the current field of bridge construction, methods such as the full hall support method, cantilever construction method, and jacking method are regarded as the traditional implementation methods that are mainly used in modern corrugated steel web composite girder bridges. Among them, the hanging basket cantilever pouring construction method is The core technology of this type of bridge construction, the gener...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a construction method for asynchronous hanging baskets of cast-in-place cantilever box girders with corrugated steel webs in order to overcome the problems of high cost, large safety hazards, and long construction period in the construction of asynchronous hanging baskets in the prior art. This method can shorten the segmental construction period, reduce time costs and improve construction efficiency while ensuring project quality and safety.

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