High-strength and corrosion-resistant BMC (bulk molding compound) material anchoring system for FRP (fiber reinforced plastic) grid and anchoring method

Abstract

The invention discloses a high-strength and corrosion-resistant BMC (bulk molding compound) material anchoring system for an FRP (fiber reinforced plastic) grid. An anchoring part comprises an upper pressing sheet, a middle fixing sheet and a bottom gasket fixed together from top to bottom; two adjacent side surfaces of the upper pressing sheet are aligned to the corresponding side surfaces of the middle fixing sheet and the bottom gasket respectively; a hole is formed in the middle of the anchoring part; a knock-type expansion anchor bolt comprises a sleeve and an anchor screw positioned in the sleeve; the outer diameter of the sleeve is slightly smaller than the inner diameter of the hole; lines are arranged on the exposed surfaces of the upper pressing sheet and the bottom gasket; the bottom of the sleeve is divided into three parts; the spaced bottom of the sleeve can be expanded when being extruded. The anchoring system and an anchoring method are good in durability, convenient for construction and excellent in performance, not only can effectively and conveniently fix the FRP grid but also have good mechanical property, radically solve problems of interfacial debonding and slip, have the advantages of corrosion resistance, high strength and the like, and can better ensure cooperative work of the FRP grid and concrete.

Description

technical field [0001] The present invention relates to reinforcements for FRP grids, in particular to an anchoring device for FRP grid reinforcements. Background technique [0002] High-performance Fiber Reinforced Plastic (FRP) mesh is an integral mesh formed by impregnating high-performance continuous fibers such as carbon fiber and glass fiber in a resin with good corrosion resistance. On the basis of inheriting the advantages of traditional FRP sheets (cloth, board, etc.) such as high strength, low specific gravity, and corrosion resistance, FRP grids have good anchorage and mechanical engagement with concrete, and better solve interface peeling and slippage It is a new type of structural reinforcement material and has been widely used in tunnels and aircrafts in the United States, Japan and other countries. Runways, aprons, bridges, highways, buildings, ditches and many other reinforcement and reconstruction projects. Among them, the fixing of the grid is an importan...

AI Technical Summary

Problems solved by technology

Among them, the fixing of the grid is an important part of the FRP grid reinforcement technology. When the FRP grid strengthens the structure, it is necessary to first fix the grid profile on the surface of the original concrete member, and then spray or trowel the polymer cement mortar and the original concrete. Bonding and fixing, after forming an integrated body, they are jointly stressed and work together. In this process, the bonding between the mortar and the concrete components is often not strong, and it is easy to form a weak point of bonding, and the bonding effect is poor.

At present, there is no special anchoring device to firmly combine the FRP grid and the concrete structure to completely solve the problem of interface peeling and slippage, which has greatly reduced the use effect of the current FRP grid

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