Strip anti-slip key pipe anchor

Abstract

The invention relates to a bar-shaped anti-sliding key tube type anchor rod. The anchor rod comprises a hollow tube type rod body with the two ends opened, a baffle ring and a base plate. A plurality of rectangular openings are distributed in the tube wall of the tube type rod body, and the top end of the tube type rod body is filled with stemming and is further provided with the baffle ring with the base plate. Igniting primer which is provided with a detonator is arranged inside the tube wall at the bottom end of the tube type rod body. Columnar charged powder is arranged inside the tube wall which is provided with the rectangular openings. The bar-shaped anti-sliding key tube type anchor rod is simple in structure, convenient to construct and low in cost, anchoring force can be supplied immediately to control rock and earth mass to be deformed, meanwhile, a load transferring mechanism for rock and soil anchoring is improved so that the anchoring force of the anchor rod can be improved, hence, the stability of the rock and earth mass is obviously improved, and the security of anchoring engineering is greatly enhanced.

Description

technical field [0001] The invention relates to rock-soil anchoring technology, in particular to a bar-shaped anti-skid key tube type 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 i...

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 bolt 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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