Steel-PVA fiber toughness concrete combined bridge deck structure and construction method thereof

Abstract

The invention discloses a steel-PVA fiber toughness concrete combined bridge deck structure and a construction method thereof. The combined bridge deck structure comprises a steel bridge panel layer,a PVA fiber toughness concrete layer, a bonding layer and an asphalt concrete surface layer; a plurality of shear bolt nails are fixed to the steel bridge panel layer; and the PVA fiber toughness concrete layer is laid on the steel bridge panel layer, and internally provided with longitudinal and transverse double-layer reinforcing meshes and chloroprene rubber cushion blocks which are laid out onthe steel bridge panel layer and used for supporting the longitudinal and transverse double-layer reinforcing meshes. The combined bridge deck structure has the advantages that the building height issmall, the light weight and high strength are achieved, bonding performance between all the combined layers is good, cooperative bearing of all the combined layers is uniform, deformation compatibility is easy to control, durability is good, anti-fatigue performance is good, and the impact effect of vehicles is small, and is particularly suitable for bridge deck pavement of large-span bridges.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a steel-PVA fiber ductile concrete composite bridge deck structure and a construction method. Background technique [0002] At present, my country's research on steel bridge deck pavement shows that there were double-layer SMA pavements in the early days, but serious diseases such as shifting, cracking, and rutting occurred, and they are no longer used. Domestic professionals have conducted in-depth research on the failure of double-layer SMA mixtures to be successfully applied to steel bridge decks in my country, and found the root cause, that is, the interface structure materials cannot meet the pavement requirements. [0003] Specifically, the interface material used for the steel bridge deck paved with SMA is composite modified high-viscosity asphalt, which is coated on the steel plate so that the SMA and the steel plate are bonded together to bear the force together. Howev...

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Problems solved by technology

[0010] Aiming at the deficiencies and defects in the steel bridge deck pavement technology in the prior art, the present invention provides a steel-PVA fiber ductile concrete composite bridge deck structure and construction method, in which the structural reinforcement mesh is placed in the middle of the PVA fiber ductile concrete layer In this way, the steel bridge deck pavement not only controls the insufficient stiffness of the bridge deck steel plate, but also controls the vertical stiffness of the pavement itself to transition to the asphalt concrete surface layer, which adapts to the coordination of steel deck deformation and traffic load, and conforms to the coordination of structural deformation. Control Method

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