Hydraulic expansion grouting bolt and anchoring method

Abstract

The embodiment of the present invention provides a hydraulic expansion type grouting bolt, comprising: a C-shaped pipe rod body, a guard plate, a grouting nozzle, a grouting plug, an intermediate head pipe, a rod end head pipe and a sealing head; The pipe rod body includes: a C-shaped pipe body, a C-shaped water injection cavity, an O-shaped grouting cavity, the cavity opening of the C-shaped water injection cavity at the first end of the C-shaped pipe body is sealed, and the O-shaped grouting cavity at the second end of the C-shaped The cavity is sealed; the slurry stopper and the guard plate are sequentially sleeved on the first end of the C-shaped pipe body; the first end of the rod tail head pipe is sealed and sleeved on the first end of the C-shaped pipe body, and the rod tail head pipe A water injection hole is set at the joint of the pipe body; the grouting nozzle is sealedly connected with the second end of the rod end head pipe; the first end of the intermediate head pipe is sealed and sleeved on the second end of the C-shaped pipe body, and the second end of the intermediate head pipe is sealed Sealing connection with sealing head. By applying the solution provided by the present invention, single-hole anchoring and grouting reinforcement are realized, and after the grouting is solidified, secondary consolidation and anchoring of the bolt can be realized, and the anchoring effect is improved.

Description

technical field [0001] The invention relates to the technical field of anchoring and grouting, in particular to a hydraulic expansion type grouting bolt and an anchoring method. Background technique [0002] Anchoring and grouting technology is widely used in roadway and tunnel surrounding rock support, slope reinforcement and other fields. Conventional anchoring methods include expansion anchoring and bonding anchoring. Among them, expansion anchoring uses an expansion structure to squeeze the bolt and the rock wall. Fitting and anchoring; bonding and anchoring use resin or cement material to harden and bond the medicine coil after stirring. In implementation, grouting reinforcement generally cannot be implemented at the same time as anchoring. It is necessary to drill a separate grouting hole and send it into a hollow grouting rod body. After the hole is sealed by a stopper, an expansion capsule, cement or polyurethane, the rock mass grouting reinforcement can be carried o...

AI Technical Summary

Problems solved by technology

[0003] In related technologies, the emergence of single-section C-shaped pipe hydraulic expansion anchor rod has realized extrusion-type full-length anchoring, which has the advantages of timely installation, convenient operation, and reliable anchoring. It has the advantage of being able to apply pre-tightening force to the surrounding rock, but it is not yet possible to use anchor rods to complete grouting reinforcement

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