Steel fiber reinforced concrete vibration leveling construction method for bridge deck reinforcement

Abstract

The invention discloses a steel fiber reinforced concrete vibration leveling construction method for bridge deck reinforcement. The construction method comprises the steps of bridge deck finishing, on-site mixing, paving, vibrating and compacting, scraper leveling, joint cutting, anti-sliding treatment, maintenance and the like. A special mixing machine is adopted for on-site mixing and comprises a mixing box and a stirring barrel, the mixing box is provided with a steel fiber feeding hopper, a triangular supporting plate, a concrete feeding hopper and a driving shaft, and the driving shaft is connected with a driving fluted disc and a plug-flow stirring paddle; the driving fluted disc is meshed with a driven fluted disc through a tooth column, the driven fluted disc is connected with a driven roller, and the driven roller is provided with wing plates. The stirring barrel is provided with a discharging pipe, a stirring shaft and a trapezoidal plate; the rotatable wing plates distributed at equal intervals are adopted to form a screening array, disordered steel fibers are rapidly arranged in an oriented mode, the trapezoidal plates basically parallel to the steel fibers are arranged for stirring after oriented arrangement, the contradiction between concrete stirring and steel fiber oriented arrangement is thoroughly solved. The obtained steel fiber reinforced concrete is high in strength.

Description

technical field [0001] The invention relates to the technical field of bridge deck paving, in particular to a construction method for vibrating and leveling steel fiber concrete for bridge deck reinforcement. Background technique [0002] In the deck pavement of box girder bridges, the strength of concrete is particularly important, so steel fiber reinforced concrete is widely used. Steel fiber reinforced concrete is a new type of multiphase composite material formed by mixing random distributed short steel fibers into ordinary concrete. These randomly distributed steel fibers can effectively prevent the expansion of micro-cracks and the formation of macro-cracks in concrete, significantly improve the tensile, bending, impact and fatigue properties of concrete, and have good ductility. [0003] Recent studies have shown that the distribution and orientation of steel fibers are closely related to the strength of steel fiber reinforced concrete, so a research direction - the ...

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Problems solved by technology

According to the current research results, the operation of directional arrangement of steel fibers is still relatively difficult, and the preparation efficiency is also low, which affects the construction efficiency of large-area bridge deck pavement and needs to be improved urgently

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