Assembling unit for exerting prestress on glass fiber reinforced plastic anchor bolt and using method thereof

Abstract

The invention relates to the field of anchor bolt processing and application, in particular to an assembling unit for exerting prestress on a glass fiber reinforced plastic anchor bolt and a using method. The assembling unit for exerting prestress on the glass fiber reinforced plastic anchor bolt is characterized by comprising a steel sleeve (1), a nut (2) and a gasket (3), wherein one end of the steel sleeve (1) is provided outer threads, the nut (2) is matched with the outer threads to be used, and the gasket is arranged at the lower end of the nut (2). The inner wall of the steel sleeve (1) is provided with inner threads for fixing a fully-threaded glass fiber reinforced plastic anchor bolt (5) in matching mode. Therefore, the assembling unit has the following advantages that firstly, the defect that high-strength prestress cannot be exerted on common glass fiber reinforced anchor bolts is overcome, a reinforcing effect is improved, and particularly a loose broken rock and soil reinforcing effect is improved; and secondly, strength of the tail of the anchor bolt can be improved, probability of fracture of the tail of the anchor bolt is decreased, and further, torsion cannot be generated when prestress is exerted on the glass fiber reinforced plastic anchor bolt, and performance and quality of the anchor rod are improved.

Description

technical field [0001] The invention relates to the field of bolt processing and application, in particular to an assembly for applying prestress to a glass fiber reinforced plastic bolt and a method for using the same. Background technique [0002] In the fields of underground engineering and slope engineering, bolt support is the most widely used geotechnical reinforcement measure. At present, the common types of anchors include mortar anchors, cement roll anchors, mechanical anchors, pipe joint anchors, and water-expansion anchors. The material of these anchors is mainly steel. However, metal anchors are used When the rod is used to reinforce the surrounding rock of an underground mine, sparks are likely to be generated, causing a gas explosion, causing casualties and property losses. In addition, the metal anchor rod also has the defects of easy corrosion and poor durability. Therefore, after the appearance of glass fiber reinforced plastic bolts, fiberglass bolts have...

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the technical problems that the FRP bolts in the prior art have low anti-torque performance, cracks occur when the torque reaches a relatively low level, and cannot continue to withstand higher tensile forces; a kind of It overcomes the defect that it is difficult to apply high-strength pretightening force to ordinary glass fiber reinforced plastic bolts, and improves its reinforcement effect, especially the effect of reinforcing loose and broken rock mass and soil mass. It is a combination of prestressed glass fiber reinforced plastic bolts and its use method

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