Special-shaped wall integral anchor rod

Abstract

The invention discloses an abnormal wall integral anchor-pouring anchor rod, which comprises a steel pipe body drilled with eyelets, wherein an exposed section of the steel pipe body is processed with screw threads, and the wall thickness of the end of the exposed section of the steel pipe body is enlarged so that the steel pipe body becomes an abnormal wall steel pipe; the front end of the steel pipe is processed into a braided shape and is used as the anchoring end; and a reducing part of the steel pipe body is in a convex ring shape. The anchor rod has the advantages that the front end of the steel pipe is provided with the anchoring end to play a role of the anchor rod and prevent the abnormal wall steel pipe from rushing out of a bore hole in the process of slip casting; the exposed section of the steel pipe is processed with the screw threads after the wall thickness thereof is enlarged so as to ensure the effective wall thickness of the exposed section of a slip-casting anchor rod and enhance the tensile strength thereof so that the abnormal wall steel pipe plays the role of the anchor rod and plays the role of the slip casting; the wall thickness of the externally exposed end, and the tensile strength is enhanced, thus the anchoring force is improved; and because a convex ring at the reducing part plays a role of a check ring, a stop-grouting plug has good leak tightness, and slurry is not thrown up in the slip casting.

Description

technical field [0001] This application relates to mine support bolts, especially grouting bolts Background technique [0002] The grouting bolt used in mine underground at present, its structure mainly has the steel pipe body of some small holes, pallet, nut and extruding self-sealing grout stop plug etc., and processes upper screw thread at the exposed end of steel pipe. When grouting, insert it into the borehole, seal the hole with hemp or quick-hardening cement roll, and then connect the grouting pipe to inject grout into the surrounding rock. [0003] The disadvantages of this grouting anchor are: [0004] 1. There is no end anchor at the front end. During grouting, the grouting anchor is easily flushed out of the borehole, which is easy to cause accidents; [0005] 2. After the thread is processed on the exposed end, the thickness of the pipe wall becomes thinner, the tensile strength decreases, and it is easy to corrode; [0006] 3. There is no blocking of the slur...

AI Technical Summary

Problems solved by technology

[0004] 1. There is no end anchor at the front end. During grouting, the grouting anchor is easily flushed out of the borehole, which is easy to cause accidents;

[0005] 2. After the thread is processed on the exposed end, the thickness

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