Combined box girder cast-in-place concrete top plate construction method

Abstract

The invention provides a combined box girder cast-in-place concrete top plate construction method. The method comprises the steps that: a combined box girder is hoisted and fixed, wherein the combinedbox girder comprises a steel top plate and side webs; at least one preformed hole is formed in the edge of the steel top plate; at least one supporting hanging bracket is arranged between the steel top plate and the side web plates; the supporting hanging brackets are fixedly connected with the preformed holes in the corresponding positions through bolts; a distribution beam is laid between everytwo adjacent supporting hanging brackets, and bottom die plates are laid on the distribution beams; a steel reinforcement framework and side die plates are installed on the steel top plate and the bottom die plates; concrete filled with a steel reinforcement framework is poured between the steel top plate and the side die plates; and after the strength of the concrete meets a preset requirement,the die plates and the supporting hanging brackets are dismantled. The construction difficulty of top plate pouring of the combined box girder can be reduced through the supporting hanging brackets.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method for a cast-in-place concrete roof of a combined box girder. Background technique [0002] With the acceleration of social urbanization, the number of urban car ownership continues to increase, and traffic congestion has become a major problem related to the lives of urban residents. In order to make better use of the limited space of the urban public road network and realize the expressway of three-dimensional traffic on the ground, various viaducts in the city Planning and construction is increasing day by day. [0003] At present, the design of viaducts mostly adopts the form of cast-in-place box girder structure, and realizes interconnection through curved ramp bridges and parallel ramps. The standard width of cast-in-place girder design is two-way four-lane and six-lane, and the standard section bridge width is generally more than 25 meters...

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the purpose of the present invention is to provide a construction method for a composite box girder cast-in-place concrete roof, so as to solve the problems of difficulty in constructing a concrete cast-in-place roof, low efficiency, and long period.

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