Section steel embedded type FRP (Fiber Reinforce Plastic) sectional material arch supporting structure

Abstract

The invention discloses a section steel embedded type FRP (Fiber Reinforce Plastic) sectional material arch supporting structure. The supporting structure is composed of a section steel embedded type FRP sectional material arch and a vertical steel bar by welding, and sand is stuck on an outer layer of the FRP sectional material arch. In a tunneling project, underground water is enriched and the environment is bad, and an arch supporting structure is used as one part of tunnel permanent support and has the problems of easiness of being rusted and poor durability. An FRP sectional material has the advantages of light weight, high corrosion resistance, high strength and the like; however, the FRP sectional material also has the problems of high price, low elastic modulus, large deformation and brittle failures. Traditional section steel is embedded into the FRP sectional material and respective advantages of FRP and steel can be comprehensively utilized, so that the problem of steel corrosion is radically solved and the mechanical properties of the FRP are improved. The supporting structure disclosed by the invention integrates the advantages of high elastic modulus and high ductility of the steel, and the light weight, high strength and high corrosion resistance and the like of the FRP, and has a good application prospect in the tunneling project.

Description

technical field [0001] The invention belongs to the research and development of composite materials and new structures in the fields of civil engineering, transportation, water conservancy, etc., and specifically relates to an FRP profile arch support structure with embedded profile steel used in tunnel engineering. It is characterized by light weight, high strength, high ductility, high elastic modulus, high cost performance, and excellent corrosion resistance. Background technique [0002] Steel arch is one of the most commonly used forms of primary support in tunnel engineering, which has the advantages of large elastic modulus and high ductility. Most of the steel arches can be used as a part of the permanent support of the tunnel, so it is required to have good durability. Due to the enrichment of groundwater and the harsh environment in the tunnel project, the steel has the problems of easy corrosion and poor durability. FRP has the advantages of light weight, strong...

AI Technical Summary

Problems solved by technology

Due to the enrichment of groundwater and the harsh environment in tunnel engineering, steel is prone to corrosion and poor durability

FRP has the advantages of light weight, strong corrosion resistance, and high strength, but FRP still has the problems of low elastic modulus, large deformation, high price and brittle failure.

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