Superstructure and construction method for wide-width box girder extradossed cable-stayed bridge

Abstract

The invention relates to a superstructure and construction method for a wide-width box girder extradossed cable-stayed bridge. The superstructure for the wide-width box girder extradossed cable-stayedbridge comprises a main girder body, the main beam body is of a box girder structure, two sides of the upper surface of the main girder body are correspondingly and symmetrically provided with a bridge deck assembly in a lap joint manner; an inclined strut assembly is arranged between the main girder body and the bridge deck assembly, the inclined strut assembly is arranged obliquely, the lower end of the inclined strut assembly is fixed with the lower part of the main girder body, the upper end of the inclined strut assembly is in contact with the lower end face of a inclined surface assembly and the support of the bridge deck assembly is realized; and the bridge deck assembly can realize the extension of the main girder body in the width direction, and the main girder body and the bridge deck assembly form a bridge deck girder body structure. The superstructure and construction method for the wide-width box girder extradossed cable-stayed bridge can reduce the shear lag effect of the main girder body of the wide-width box girder extradossed cable-stayed bridge, improve the transverse stress performance of the main girder body and solve the problem that a conventional hanging basket cannot meet the cantilever pouring of a wide-width box girder of the extradossed cable-stayed bridge.

Description

technical field [0001] The invention belongs to the technical field of bridges, and in particular relates to a superstructure and a construction method for wide box girder low tower cable-stayed bridges. Background technique [0002] Low-tower cable-stayed bridge, also known as partial cable-stayed bridge, is a beam-cable combined system bridge between continuous beam and cable-stayed bridge. Cable-stayed bridges with low towers reduce the fatigue of the cables and improve the utilization rate of the cables because of the rigidity of the towers and the beams. The height of the beam body is about 1 / 2 of the continuous beam with the same span, and the appearance is light; therefore, it has a wide application prospect. [0003] Due to the cross-sectional force characteristics of the main girder body, the cable towers of the low tower cable-stayed bridge are mostly arranged in the central divider, and the central cable plane is adopted. In recent years, with the continuous inc...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a superstructure and construction method for wide-width box girder low-tower cable-stayed bridges, which can reduce the shear lag effect of the main girder body of wide-width box-girder low-tower cable-stayed bridges and improve the The lateral force performance of the body and the solution to the problem that the conventional hanging basket cannot meet the cantilever pouring of the wide box girder of the short tower cable-stayed bridge

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