Expansion anchor rod

Abstract

The invention provides an expansion anchor rod which comprises a shell, multiple anchor blocks, multiple extruding blocks, a tail block, a screw rod, a rotating block and multiple circular truncated cone blocks. The multiple anchor blocks are evenly arranged on the two sides of the shell. The multiple extruding blocks are fixedly installed on the multiple anchor blocks correspondingly, and the multiple extruding blocks are located in the shell. The tail block is fixedly installed at the top end of the shell. The screw rod is installed on the tail block in a threaded manner, and the bottom endof the screw rod extends into the shell. The rotating block is located above the tail block, and the rotating block is fixedly connected with the top end of the screw rod. The multiple circular truncated cone blocks are fixedly arranged on the outer side of the screw rod in a sleeving manner, and the multiple circular truncated cone blocks are located in the shell. The expansion anchor rod has thebeneficial effects that use is convenient, stability is good, and the anchor rod can be prevented from disengaging from a hole.

Description

technical field [0001] The invention relates to the technical field of anchor rods, in particular to an expansion anchor rod. Background technique [0002] The bolt is an anchoring system that transfers the pulling force to a stable rock layer or soil. It is used in geotechnical engineering to reinforce broken rock mass, loose rock mass or slipping rock mass, so as to increase the bearing capacity of the rock mass and improve the quality of the rock mass. stability. Various anchor rods used in mine roadways, road tunnels, and water conservancy culverts mainly play the role of composite arches, composite beams and suspensions to support and reinforce the surrounding rock, thereby increasing the strength of the surrounding rock itself under pressure. Active form of support. As an effective tunnel support method, bolt support can not only significantly improve the tunnel support effect, enhance the stability of surrounding rock, but also save a lot of support and maintenance ...

AI Technical Summary

Problems solved by technology

Although the setting of its expansion barb and soil drilling point is firm and firm, not easy to fall off, the installation method is simple, the fixing effect is ideal, and it is convenient for market promotion and application, but the rock formations and soils at the construction site are mostly relatively hard, resulting in its installation. The hole must also be drilled first, and the position of the fixing protrusion is fixed, which requires a higher diameter of the hole drilled in advance. If the hole is too large or too small, it will not be able to play a fixed role, and it will easily cause the anchor to fall off. Affect the stability of the anchor rod

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