Movable anchor rod based on chemical anchor increasing and using method thereof

Abstract

The invention discloses a movable anchor rod based on chemical anchor increasing and a using method thereof. The movable anchor rod comprises a threaded anchor rod main shaft, a three-edged anchoring steel body, a movable anchor fluke, a high-strength spring, a chemical rubber pipe, an anchor rod stabilizer, a hollow connecting pipe, an expansion pipe and the like. The hollow connecting pipe wraps the periphery of the threaded anchor rod main shaft; the three-edged anchoring steel bodies are distributed on the periphery of the hollow connecting pipe and form a movable anchor increasing structure together with the high-strength spring; the chemical rubber pipe is attached to the hollow connecting pipe, and reaction resin, a curing agent and quartz particles are contained in the chemical rubber pipe. The whole anchor rod is placed in a drilling hole, the expansion pipe is expanded under the traction of the threaded anchor rod main shaft to be tightly attached to surrounding rock through reverse rotation of the locking nut, the movable anchor fluke crushes the chemical rubber pipe under the action of the high-strength spring, and a secondary anchoring structure is formed. The whole anti-pulling grouting anchor rod generates an anti-pulling effect through mechanical occlusion, the application defect of an existing grouting anchor rod is overcome, and the anti-pulling grouting anchor rod has the advantages of anchor withdrawing prevention, high adaptability, good anchoring effect and the like.

Description

technical field [0001] The invention relates to the technical field of supporting anchor rods, in particular to a movable anchor rod based on chemical anchor increase and a method for using the same. Background technique [0002] With the rapid development of urbanization in China and the increasing scarcity of urban construction land, in recent years, the construction of underground space is developing in a deeper and larger direction. A large number of giant underground transportation hubs, port locks, multi-storey underground shopping malls, underground warehouses and garages, underground reservoirs and underground civil air defense projects are constantly emerging in large and medium-sized cities. The accompanying deep foundation pit support engineering and underground space anti-floating engineering are facing new challenges, and also bring new opportunities for the development of geotechnical anchoring technology. The traditional bolt technology used to be an importan...

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Problems solved by technology

[0003] The invention provides a movable anchor based on chemical anchoring and its use method to solve the problems of insufficient friction between the traditional tension anchor and the surface of the rock mass, the withdrawal of the anchor and the large deformation of the tension anchor. Combined with triangular anchoring steel body and movable anchor fluke to increase anchor, acid and alkali resistance, low temperature resistance, aging resistance, long-term load stability in humid environment, and give full play to the supporting role of anchor rod

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