novel Steel-Concrete Composite Continuous Box Girder Bridge and Its Scaffolding-Free Industrial Construction Method

Abstract

The invention discloses a novel stee-concrete composite continuous box girder bridge, including spaced cast caps and piers fixed on each caps, each pier top mounted with bearings and steel erected between two adjacent bearings. Mixed composite box girder segments; Steel box girder segments are hoisted at the top of each bearing. The web plate and bottom plate of the joint part of the composite boxgirder segment and the steel box girder segment adopt the high-strength bolt + double-sided splice plate fillet welding connection structure, and the top plate adopts the steel cell structure filledwith concrete. The invention also discloses a support-free industrial construction method of the bridge. The whole bridge structure of the invention is reasonable, the main structural parts can be prefabricated in advance, assembled on the spot, and the field construction speed is fast, which accords with the development trend of bridge industrialization construction. The pier top adopts steel boxgirder, and the whole bridge has steel. The structural advantages of concrete composite continuous box girder bridges can also effectively overcome the shortcomings of The stee-concrete composite continuous box girder bridge. The problem that the negative moment zone near the pivot of concrete composite continuous box girder bridge is unreasonable is resolved.

Description

technical field [0001] The invention relates to the technical field of roads and urban roads and bridges, in particular to a novel steel-concrete combined continuous box girder bridge, and also relates to an industrialized construction method of the bridge without supports. Background technique [0002] Steel-concrete composite box girder is a new type of beam structure developed on the basis of steel structure and concrete structure. The upper part of the steel-concrete composite box girder structure is composed of concrete slabs, and the lower part is composed of steel box girders, and the joints of the two are connected by shear connectors such as shear nails. In the composite beam section, the concrete slab is mainly subjected to compression, and the steel box girder is mainly subjected to tension. The respective advantages of steel and concrete can be fully and reasonably utilized. Compared with steel bridges, it has the advantages of saving steel, reducing building hei...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new type of steel-concrete composite continuous box girder bridge against the unreasonable structural stress in the negative moment area near the fulcrum of the existing steel-concrete composite continuous box girder bridge, and the lack of control measures for the bridge deck cracks in the existing negative moment area. Mixed combined continuous box girder bridge, the present invention also provides the industrialized construction method of the bridge without supports

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