Anchoring method of pipe seam anchor rod

Abstract

The invention discloses an anchoring method of a pipe seam anchor rod, which adopts a cement roll anchoring agent to fill a gap between the outer side of an anchor rod head and the hole wall of a drill hole and a pipe cavity of an anchoring section to ensure the filling quality of the gap of the hole wall and the anchoring section. The method comprises the following steps: (1) the quantity of a cement roll anchoring agent enough for filling and covering the head of an anchor rod and a pipe cavity of an anchoring section is calculated; (2) the wetted cement roll anchoring agent is pushed to the bottom of the drilled hole and is tightly fixed; (3) a pipe seam anchor rod is installed in the drill hole, and a gap between the outer side of the head of the anchor rod and the hole wall of the drill hole is filled with a cement roll anchoring agent; (4) the anchor rod continues to be pushed, and the cement roll anchoring agent slightly outside the dense anchor rod head is squeezed into a pipe cavity of the anchor rod body; and (5) the cement roll anchoring agent in the pipe cavity of the anchoring section is pushed to the bottom densely, and the supporting force of the anchoring section is increased. By implanting the cement anchoring agent, the bonding anchoring length of a section of anchor rod is increased, and the radial supporting force of the anchoring section is increased.

Description

technical field [0001] The invention relates to the technical field of rock roadway excavation in tunnels and underground engineering, in particular to an anchoring method for pipe seam bolts. Background technique [0002] see figure 1 and figure 2 , the existing pipe joint anchor is a low prestressed anchor that actively reinforces the surrounding rock. The anchor body is a high-strength steel pipe with longitudinal slots. When the rod is installed in a borehole slightly smaller than the pipe diameter, Immediately exert radial pressure on the hole wall on the contact surface of the drilling hole to generate frictional resistance, and together with the pallet prevent the surrounding rock from moving axially along the rod body. The disadvantages of this anchoring method are: [0003] Disadvantage 1: Due to the low initial anchoring force of pipe joint bolts, dense bolts need to be installed to maintain the stability of the rock roadway roof. [0004] Disadvantage 2: In o...

AI Technical Summary

Problems solved by technology

The disadvantages of this anchoring method are:

[0003] Disadvantage 1: Due to the low initial anchoring force of pipe joint bolts, it is necessary to install dense bolts to maintain the stability of the rock roadway roof.

[0004] Disadvantage 2: In order to facilitate the rod body of the pipe seam anchor to enter the anchor hole during construction, the head of the pipe seam anchor is slightly shaped to make a vertebral body

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