A drainable self-drilling graded yielding bolt and its supporting method

Abstract

The application discloses a drainable self-drilling graded pressure anchor and its supporting method, including a high-strength damping nut, a high-strength backing plate, a tower spring, a high-strength small backing plate, a high-strength bowl-shaped tray, a high-strength rod body, and a high-strength backing plate. Crimped tubing, drill bits, epoxy. The anchor rod parts are all coated with epoxy resin protective layer, so that the surface of the pressure tube is arranged with drainage holes for the pressure tube, and there is a gap between the pressure tube and the high-strength rod body, so that the two ends of the pressure tube and the high-strength rod body have sufficient strength to seal the connection. When connecting the end of the bolt, use a gradual tightening connection; assemble the drill bit, pressure pipe and high-strength rod body and drill them into the surrounding rock, and use resin anchoring agent at the end of the bolt; install a high-strength bowl-shaped tray with drainage holes and a high-strength Damping nut; install high-strength small backing plate, tower spring, high-strength backing plate and high-strength damping nut. By burying the permeable yield pipe and other components into the drainage self-drilling graded yield anchor rod and embedding it in the surrounding rock, it is possible to realize the support of graded yield anchoring and drainage of the surrounding rock and soil mass.

Description

technical field [0001] The present application relates to the technical field of geotechnical engineering anchoring and geological disaster prevention and control, in particular to a self-drilling graded yielding anchor rod and its supporting method suitable for drainage of underground engineering, slope engineering, landslide prevention and the like. Background technique [0002] With the development of underground engineering and geological disaster prevention and control engineering, the increase of excavation depth and tunnel section in the project, and the complex engineering geological conditions, the engineering is faced with many problems, and the traditional bolt support can no longer meet the needs of actual engineering. . The bolt support system has strong active support and self-adaptive ability, so it is widely used in the support of large deformation tunnels. At present, experts and scholars propose to use let-pressure bolts to support and reinforce large-defo...

AI Technical Summary

Problems solved by technology

When tunnels pass through soft rock formations, there are problems such as large deformation of soft rock and soil, landslides and roof fall in shallow buried tunnel sections, water gushing and mud inrush in fault tunnel sections, and other problems, such as deformation and damage of surrounding rocks and geological disasters, especially in soft rocks with large buried depths. Deformation and other problems will have adverse effects on the construction of the project, the support lining scheme and the permanent operation of the project.

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