Drainable self-drilling grading yielding anchor rod and supporting method thereof

Abstract

The application discloses a drainable self-drilling grading yielding anchor rod and a supporting method thereof. The drainable self-drilling grading yielding anchor rod comprises a high-strength damping nut, a large high-strength base plate, a tower-shape spring, a small high-strength base plate, a high-strength bowl-shape tray, a high-strength rod body, a yielding pipe, a drill and epoxy resin. An epoxy resin protective layer is coated on parts of the anchor rod; yielding pipe drainage holes are formed in the surface of the yielding pipe; a gap is formed between the yielding pipe and the high-strength rod body; the two ends of the yielding pipe and the high-strength rod body are in sealing connection with enough strength; gradually varied compact connection is used when the tail part of the anchor rod is connected; after being assembled, the drill, the yielding pipe and the high-strength rod body are drilled into surrounding rock, and a resin anchoring agent is applied to the tail endof the anchor rod; the high-strength bowl-shape tray with drain holes and the high-strength damping nut are arranged; and the small high-strength base plate, the tower-shape spring, the large high-strength base plate and the high-strength damping nut are arranged. The water-permeable yielding pipe with other parts constitutes the drainable self-drilling grading yielding anchor rod to be embeddedinto the surrounding rock; and supporting of yielding anchoring of the surrounding rock and soil in a grading manner as well as drainage can be realized.

Description

technical field [0001] The application relates to the technical fields of geotechnical engineering anchoring and prevention of geological disasters, in particular to a drainable self-drilling graded yielding anchor rod and its supporting method, which are suitable for 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 excavation depth and tunnel section increase in the engineering, and the complex engineering geological conditions, the engineering is facing many problems. The traditional bolt support can no longer meet the needs of actual engineering. . The bolt support system has strong active support and adaptive ability, so it is widely used in the support of large deformation tunnels. At present, experts and scholars have proposed to use yield anchors to support and strengthen large deformation tunnels....

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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