Prefabricated frp reinforced seawater sea sand concrete-uhpc composite beam bridge structure and construction method

Abstract

The invention relates to an assembly type FRP (fiber reinforce plastic) reinforcing bar seawater marine sand concrete-UHPC (ultra high performance concrete) superposed beam bridge structure, which comprises a T-type beam bridge upper part flange component prepared by adopting UHPC, an FRP reinforcing bar seawater marine sand concrete T-type beam bridge web component and a transverse bridge direction prestressing force FRP pull rod system; the T-type beam bridge upper part flange component prepared by adopting the UHPC comprises a pre-buried top plate reinforcing mesh, a reserved transverse ribpenetrating pore channel and multiple anti-shearing steel bars, and a transverse bridge direction prestressing force FRP pull rod is penetrated in the reserved transverse rib penetrating pore channel; the FRP reinforcing bar seawater marine sand concrete T-type beam bridge web component comprises multiple corrugated pipes which are uniformly distributed, the corrugated pipes are communicated witha grouting material inlet and a grouting material outlet, and the anti-shearing steel bars match with the corrugated pipes; the bottom of the web component is provided with a prestressing force FRP rib, the middle is provided with an FRP wrapping steel pipe, the web component is provided with a diaphragm plate in the beam bridge span direction, and the FRP rib is arranged in the diaphragm plate.The assembly type FRP reinforcing bar seawater marine sand concrete-UHPC superposed beam bridge structure uses local materials, seawater and marine sand are used for preparing concrete, the material transportation cost is reduced, and the problem of constructing a highly durable structure rapidly in a marine environment is solved.

Description

technical field [0001] The invention relates to the technical field of marine engineering structures, in particular to an assembled FRP reinforced seawater sea sand concrete-UHPC composite beam bridge structure and a construction method. Background technique [0002] The marine environment is a typical corrosive environment. The steel bars in ordinary reinforced concrete structures are prone to corrosion and damage. Therefore, it is necessary to spend a lot of money in the design, construction and maintenance stages to ensure the durability of the structure. In addition, with the massive consumption of engineering construction, ordinary river sand resources are increasingly scarce, and more and more sea sand has appeared in the building materials market. Sea sand needs to be dechlorinated and up to standard before it can be used to prepare concrete, which consumes a lot of fresh water resources. How to use untreated sea sand, or even directly use seawater in coastal areas t...

AI Technical Summary

Problems solved by technology

However, the cost of UHPC is high, and the cost of replacing ordinary concrete is too high, and it is not economical to use it in the tension area of ​​the component to bear the tension

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