UHPC-Ordinary Concrete Laminated Composite Bridge Deck Structure and Construction Method

Abstract

The invention discloses a UHPC-ordinary concrete laminated composite bridge deck structure and a construction method thereof, comprising UHPC prefabricated slabs, horizontal pre-embedded steel bars, U-shaped vertical pre-embedded bars, laminated cast-in-place concrete, and vertical and horizontal overall steel bars Mesh, wet joint concrete and steel beam flange plate shear nails; the steel beam flange plate shear nails are welded on the surface of the steel beam flange plate, and the UHPC prefabricated plate is supported on the steel beam flange plate, adjacent The horizontal pre-embedded steel bars overlap between the UHPC prefabricated slabs; the vertical and horizontal overall steel mesh is set on the flange plate of the steel beam and the UHPC prefabricated slab, and the laminated cast-in-situ concrete is poured, and the UHPC prefabricated slabs are poured with wet Connect with concrete. The bridge deck of the invention has the advantages of excellent structural mechanical performance, light weight of the bridge deck, high cost performance, continuous shear force transmission, no need for transverse prestress, and construction without supports, which is beneficial to the cooperative work of steel beams and concrete bridge decks, and improves the combination beam carrying capacity.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and relates to a composite bridge deck structure of a steel-concrete composite bridge, in particular to a UHPC-ordinary concrete laminated composite bridge deck structure and a construction method thereof. Background technique [0002] At present, my country is vigorously promoting composite structure bridges and steel structure bridges. In July 2016, the Ministry of Transport issued the "Guiding Opinions on Promoting the Construction of Highway Steel Structure Bridges", which decided to promote the construction of steel bridges and steel-concrete composite beam bridges, improve the quality of my country's highway bridges, and promote the transformation and upgrading of highway construction. The steel-concrete composite girder bridge can give full play to the characteristics of steel and concrete, and is a kind of steel-concrete bridge structure with excellent performance. [0003] Th...

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Problems solved by technology

[0003] The steel bridge deck has the problem of welding fatigue damage, and the connection between the steel bridge deck and the asphalt concrete is unreliable; the cast-in-place ordinary concrete bridge deck needs to be set with transverse prestress, and the construction process requires brackets, which is inconvenient for construction; the precast concrete bridge deck has a large block size. It is not easy to hoist, and the prefabricated slab and the steel beam are connected by cluster nails, the shear force transmission is discontinuous, and there is a phenomenon of stress concentration

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