Inverted bolt tubular anchor rod

Abstract

The invention relates to an inverted bolt tubular anchor rod which comprises a hollow tubular rod body, a baffle ring and an inserted plate, wherein the two ends of the tubular rod body are provided with openings, sealed inverted bolts are distributed on the tube wall of the tubular rod body, and the top of the tubular rod body is filled with stemming and provided with the baffle ring with the inserted plate; detonation cartridge bags with detonators are arranged in the tube wall at the bottom of the tubular rod body, and cylindrical explosives are disposed in the tube wall where the sealed inverted bolts are arranged. The inverted bolt tubular anchor rod is simple in structure, convenient to construct and low in cost, can immediately provide anchoring force to control deformation of rock and earth mass, and meanwhile, improves a load transmission mechanism of rock and soil anchoring to improve the anchoring force, and accordingly stability of the rock and earth mass is remarkably improved, and safety of anchoring engineering is greatly enhanced.

Description

technical field [0001] The invention relates to rock-soil anchoring technology, in particular to an anti-bolt tubular anchor rod. Background technique [0002] Rock-soil anchoring is to tightly interlock the strata through the anchor bolts buried in the formation, relying on the interaction between the anchor bolt-grouting body-hole wall rock-soil physical force to mobilize and improve the rock-soil mass's own strength and natural strength. It is a technology to improve the stress state of the anchored rock and soil mass to make it stable, so as to ensure the safety of the project. The engineering application of geotechnical anchoring technology originated from the end of the 19th century. With the development of its theoretical research and technology, it has been widely used in mining, water conservancy, hydropower, highway, railway, municipal, urban construction, geology, military industry and other fields. The ideal support form plays an important role in the stability...

AI Technical Summary

Problems solved by technology

When the anchoring force that needs to be provided is large, ordinary bolt anchorage can no longer meet the needs of the project, which undoubtedly restricts the application and development of rock-soil anchorage technology. How to improve the load transfer mechanism of rock-soil anchorage and overcome the disadvantages of ordinary friction anchorage , which becomes the fundamental way to improve the anchoring force of bolts and promote the development of rock-soil anchoring technology

[0005] In addition, the grouting body in rock-soil anchorage can hardly provide anchoring force before consolidation, so it cannot meet the requirement of providing anchoring force immediately after excavation of weak rock-soil mass

Although the existing pipe-slit bolts overcome the above-mentioned shortcomings, the anchoring force can be provided immediately after the bolt is installed, which is beneficial to timely control the deformation of the rock and soil mass, but the anchoring force that can be provided is not large; at the same time, due to the weak The rock and soil will squeeze into the pipe cavity from the pipe seam of the pipe seam anchor, which will also cause a further decrease in the anchoring force

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