Pre-explosion drilling, grouting and anchoring integrated anchor rod and construction method thereof

Abstract

The invention discloses a pre-explosion drilling, grouting and anchoring integrated anchor rod and construction method thereof, and belongs to geotechnical engineering. The pre-explosion drilling, grouting and anchoring integrated anchor rod consists of a sectional type drilling anchor rod, a drill bit and a sectional type hollow grouting pipe, wherein the internal hollow grouting pipe is connected with a multi-section explosive pipe at the front end of the grouting pipe; a plurality of return stoppers are arranged on the tip of the front end of the grouting pipe, which is connected with the explosive pipe; and when the integrative anchor rod is drilled to reach a specified position, a drilling rod is taken back reversely, the internal hollow grouting pipe is pushed forwards, the return stoppers work, and then the drilling rod is stopped from being taken back. A detonating cord is connected with a detonator to detonate explosive sections, a rubber stopper provided with a slurry guide pipe (exhaust pipe) follows up on the end part of the drilling rod for sealing, and a supporting liner plate, a nut and a hollow drilling rod cooperate with one another on the end part; and the supporting liner plate, through which the detonating cord penetrates, is provided with a drill way, and one section of a pipeline penetrates through the drill way of the supporting liner plate. The pre-explosion drilling, grouting and anchoring integrated anchor rod has the advantages that: the anchor integrates drilling, grouting and anchoring and molded in one step; the integrative anchor rod is applied to reinforcement of laneways, pit shafts and side slopes, and temporary or permanent supporting in water control; and the construction method has a certain promotion value.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering anchor support, water blocking prevention and control. Specifically, it is a pre-explosion drilling and anchoring integrated anchor rod and a construction method. It is an improvement to the existing anchor injection rod type and construction method. It is suitable for rock structure support reinforcement and water blocking prevention and control in underground space engineering, mining engineering, slope engineering, etc. Background technique [0002] In the process of underground space engineering, mining engineering and slope engineering involved in geotechnical engineering, the common support form adopted to prevent deformation, collapse and instability of rock formations is bolt support, which is used in conjunction with anchor shotcrete and anchor Note technology. This anchoring technology uses the high-strength tensile capacity of the anchor rod and interacts with the gr...

AI Technical Summary

Problems solved by technology

[0006] To sum up, in the above-mentioned anchoring technology, both the bolt type and the anchoring support method have defects in specific rock formations, and the support method is "passive".

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