Concrete symmetrical superimposed pouring structure and construction method of fish-belly box girder with variable cross-section

Abstract

The invention discloses a cross-section variable fish-bellied type box girder concrete symmetric overlapping pouring structure and a construction method thereof. The structure comprises a box girder web, a box chamber, a box girder top plate and a box girder bottom plate. The method comprises the following steps that S1, a straight line perpendicular to the long side of the box chamber and passing through the theoretical load center of the box girder structure serves as a center line; S2, the box girder web is subjected to concrete pouring construction, and symmetric overlapping pouring is conducted; S3, the box girder bottom plate is subjected to concrete pouring construction, and diagonal pouring is conducted; S4, the box girder top plate is subjected to concrete pouring construction, the surface of the poured concrete is treated, and diagonal pouring is conducted; and S5, flattening treatment is conducted on the surface of the box girder top plate through a roller device, and watering maintenance is conducted on the surface of the box girder top plate. According to the cross-section variable fish-bellied type box girder concrete symmetric overlapping pouring structure and the construction method thereof, the construction quality is ensured, the appearance quality after moulds are dismounted is good, the construction schedule is greatly fastened, and the construction technique difficulty of the cross-section variable fish-bellied type box girder concrete is well solved.

Description

technical field [0001] The invention relates to the construction field of a municipal engineering landscape bridge box girder structure, in particular to a variable-section fish-belly box girder concrete symmetrical superimposed pouring structure and a construction method thereof. Background technique [0002] In recent years, with the rapid development of urban bridges, in addition to meeting the basic requirements of traffic, the design function of modern bridges has added requirements such as landscape, which has led to the emergence of more bridges with complex structures and various forms. Variable cross-section cast-in-place box girders have been used in the superstructure of some large and medium-sized bridges in China. Due to the irregular cross-section of fish-belly continuous box girders with variable cross-sections, the design and construction quality requirements of box girders are also getting higher and higher, and the concrete construction quality directly affe...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a fish-belly continuous box girder with variable cross-section symmetrically stacked concrete for the existing defects that the section of the fish-belly continuous box girder is irregular, the pouring is difficult, and the quality of the poured concrete is difficult to guarantee. Composite cast structure and its construction method

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