Cutting type constant-resistance large-deformation anchor rod

Abstract

The invention relates to a cutting type constant-resistance large-deformation anchor rod, and belongs to the field of anchoring support. The cutting type constant-resistance large-deformation anchor rod comprises an anchoring section, a free section and a constant-resistance component, wherein the constant-resistance component is formed by combining a threaded rod, a sleeve and an annular cutter, the tail of the threaded rod is provided with threads and is connected with a rod body of the free section through the sleeve, the tail end of the rod body of the free section is an anchor head with an enlarged diameter, a circle of slurry discharging holes are formed in the outer diameter of the anchor head, the anchor rod body is of a hollow structure and can conduct pressurized grouting, and slurry flows out from the slurry discharge holes at the anchor head. The constant-resistance component cuts the threads on the end of the threaded rod through the annular cutter, continuous constant resistance is provided, and additionally, the rod body moves forwards so as to provide the required large deformation. The cutting type constant-resistance large-deformation anchor rod has the advantages of the simple structure and convenience in construction, joints are in threaded connection, continuous constant resistance can be provided, the required resistance can be controlled by adjusting the shape and distance of the threads, materials of the threads and other conditions, the structure is stable and reliable, and the requirement for on-site rapid construction is met.

Description

technical field [0001] The invention belongs to the field of anchoring and supporting, in particular to a cutting type constant resistance and large deformation anchor rod. Background technique [0002] Bolt support technology is an engineering technique that embeds bolts to a certain depth in the rock and soil body to improve the strength of the rock and soil body and maintain its stability. The reinforcement mechanism of bolt support can be divided into suspension, composite beam, reinforcement reinforcement, internal pressure, rock crust, support and pin action. In 1872, a quarry in North Wales, England is the earliest known example of the application of bolt support technology. The cost of bolt support is low, the effect is fast, and the support effect is good. It is used in mining, transportation, water conservancy, municipal engineering and other fields. It has been widely used in the field of underground engineering. [0003] Engineering practice shows that the trad...

AI Technical Summary

Problems solved by technology

When the surrounding rock undergoes large deformation, due to the low elongation, the traditional bolt cannot meet the requirements of modern mines for supporting the surrounding rock

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