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Abstract

According to the engineering environment and functional requirements of highway bridges in mountainous areas, the design characteristics of continuous box girder bridges with variable widths and the technical difficulties of cast-in-place construction by support method were analyzed. Based on the engineering environment and structural design characteristics, the technical feasibility, safety, operability, and economy of various support systems such as full-hall support, beam-to-column support, and combined support, hoop (steel bar) or bullleg support with pier, and floor mold were analyzed. The composite full-hall support and beam-to-column support scheme was scientifically and reasonably selected, and its construction quality control points were introduced. In view of the economic difference between the steel formwork and the wood formwork system, the wood formwork system was recommended, and the influence of internal mold removal on the bridge structure was analyzed. Based on the advantages and disadvantages of the first and second pouring schemes of box girder concrete, the technical countermeasures for the construction quality control of reinforcement, concrete, and prestress of continuous box girder bridges with variable width on mountainous highways were described in detail.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2022.06.027

First Page

146

Last Page

151

Submission Date

May 2025

Reference

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