Sisal fiber reinforced composite bridge deck structure and construction method thereof

Abstract

The invention relates to a sisal fiber reinforced composite bridge deck structure and a construction method thereof. The structure comprises webs of a bridge steel truss, assembling beam blocks whichare spliced into a bridge deck slab are mounted on the web plates; the assembly beam block comprises an upper chord located at the bottom. A profiled steel sheet is laid on the upper chord, a sisal hemp fiber concrete layer formed by pouring sisal hemp fiber reinforced composite materials is laid on the profiled steel sheet, shear nails embedded in the sisal hemp fiber concrete layer are welded tothe profiled steel sheet, and an asphalt concrete layer is laid on the bridge deck formed by splicing the assembly beam blocks. According to the sisal fiber reinforced composite bridge deck slab structure, the sisal fibers are selected to enhance the mechanical property of a cement-based pavement, the structure has the advantages of being light in dead weight, high in strength, resistant to fatigue, long in service life and convenient to construct, the durability of the bridge structure is guaranteed, and the structure is suitable for large-span bridge engineering crossing riverways.

Description

technical field [0001] The invention relates to a sisal fiber reinforced composite bridge deck structure and a construction method thereof, belonging to the technical field of bridge engineering. Background technique [0002] Bridge deck, also known as roadway deck, is a load-bearing structure that directly bears vehicle wheel pressure loads and environmental loads, and is also the most directly affected component by overload, corrosion, fatigue and other adverse factors. [0003] At present, the reinforced concrete bridge deck is the most commonly used, and the bottom layer is the reinforced concrete layer laid on the steel truss of the bridge. -2017) Reinforced concrete bridge deck pavement requirements, which usually use a concrete pavement layer with a thickness of about 8cm in the middle, and an asphalt concrete pavement layer with a thickness of about 9cm on the top layer. [0004] This kind of reinforced concrete bridge deck is mainly suitable for highway bridges wit...

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Problems solved by technology

[0004] This kind of reinforced concrete bridge deck is mainly suitable for highway bridges with small and medium spans. For bridges with relatively large spans across rivers, due to the large thickness of this reinforced concrete bridge deck (usually 200~280mm) and dead weight (usually 500~700 ), resulting in a large amount of substructure including foundation works and a long construction period; moreover, the fatigue resistance of this reinforced concrete bridge deck is poor, and it is easy to produce damage under the repeated impact of wheel pressure loads and temperature stresses. cracks, causing corrosion of the steel bars on the bridge deck, affecting the durability of the bridge structure, and even directly causing cracking and damage to the bridge deck concrete under the action of impact and fatigue loads

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