Construction and construction technology of a prestressed steel box concrete composite continuous girder bridge

Abstract

The invention relates to a prestressed steel box concrete combination continuous beam bridge structure. The structure comprises bridge piers, main beams and a concrete bridge face; the bridge piers are connected with the main beams through bridge pier supports; the main beams are arranged between the adjacent bridge piers and are connected with the adjacent main beams through concrete and steel cables; the concrete bridge face is laid on the main beams; the main beams comprise a plurality of steel main beams which are arranged in parallel; the parallel steel main beams are connected through a plurality of steel cross beams perpendicular to the steel main beams; each steel main beam comprises a steel box structure, a steel web plate and a steel bottom plate; the steel bottom plates are connected with the steel box structures through the steel web plates; the lower ends of the steel box structures are connected with the bridge piers through the bridge pier supports; the upper ends of the steel box structures are connected with the concrete bridge face; the overall height of the steel main beams is smoothly decreased in a quadratic parabolic curve mode from the position above the bridge piers to the midspan. Compared with the prior art, the structure has the advantages of being large in rigidity, reasonable in structure, easy to construct, easy to maintain and the like.

Description

technical field [0001] The invention relates to the field of bridges, in particular to a structure and construction technology of a prestressed steel box concrete composite continuous girder bridge Background technique [0002] Composite girder bridge refers to a bridge made of two materials combined in the same section, generally composed of steel and concrete. [0003] The existing steel box concrete composite continuous girder bridge adopts an open steel box, which is connected with the prefabricated concrete bridge deck through the shear nails on the upper part of the web and the cast-in-place concrete. To cause cracking, set prestressed steel tendons inside the prefabricated bridge deck or apply external prestress in the negative moment area. Problems exist in prior art solutions: [0004] 1. It is difficult to apply prestressing on the roof, and the degree of prestressing is limited. Zhang Nan et al. pointed out in the analysis of the impact of external prestressing ...

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