Prefabricated assembled UHPC-corrugated steel web combined box girder bridge and construction method

Abstract

The invention belongs to the technical field of civil engineering, and relates to a prefabricated assembled UHPC-corrugated steel web combined box girder bridge and a construction method thereof. The bridge comprises a bridge pier and a UHPC-corrugated steel web combined box girder which is arranged on the bridge pier and connected with the bridge pier. The combined box girder is formed by sequentially splicing a plurality of UHPC-corrugated steel web combined box girder sections; each section comprises a UHPC top plate, a UHPC bottom plate, a corrugated steel web and a UHPC transverse partition plate. The UHPC top plate and the UHPC bottom plate are axially arranged in parallel; the corrugated steel web is arranged at the web position; the UHPC transverse partition plate is vertically arranged between the UHPC top plate and the UHPC bottom plate and makes contact with the corrugated steel web; And the UHPC bottom plate is connected with the bridge pier. The structural design is simple, the dead weight of the box girder bridge is remarkably reduced, and the main span of the bridge is greatly increased; the cracking risk is obviously reduced, and the structural durability is improved; the construction is convenient, and the site construction period is greatly shortened.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a prefabricated assembled UHPC-corrugated steel web composite box girder bridge and a construction method. Background technique [0002] The long-span prestressed concrete box girder bridge has become the mainstream bridge type with a main span of 200m due to its good structural performance, simple and convenient construction, and low maintenance costs in the later period. However, excessive deflection of the main span and cracking of the girder body of long-span prestressed concrete box girder bridges are very common, and have become chronic problems of this type of bridge, seriously threatening the safe operation and durability of the structure, and have not been effectively solved so far. [0003] In order to solve the web cracking problem of long-span prestressed concrete box girder bridges, early researchers used corrugated steel plates to replace concr...

AI Technical Summary

Problems solved by technology

However, the roof and floor of the bridge are still poured with ordinary concrete materials with low tensile strength. It is difficult to resist the large tensile stress caused by various internal and external complex factors of the long-span structure, and cracks are prone to occur, reducing the durability of the structure.

Therefore, the top and bottom plates of corrugated steel web composite box girder bridges have become a bottleneck restricting its further promotion and application

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