Full-length prestress anchor grouting supporting device and process capable of expanding internal anchor solids in combined mode

Abstract

The invention discloses a full-length prestress anchor grouting supporting device and process capable of expanding internal anchor solids in a combined mode. The full-length prestress anchor groutingsupporting device comprises an inner section anchor rod body and an outer section anchor rod body, wherein a detonation device is arranged between the two rod bodies, and the outer section anchor rodbody is a hollow rod body and comprises a slurry stopping plug, a tray and a nut on the outer peripheral part of the outer end. According to the full-length prestress anchor grouting supporting deviceand the process, an anchor rod is anchored and installed at the bottom part of a stratum drilling hole through a combined type anchoring cartridage, and the combined type anchoring cartridage sequentially comprise a first expanded cartridage, a second explosive cartridge and a third quick-coagulation cartridage in the length direction, and the first expanded cartridage can generate volume self-expansion holes on the wall of the drilling hole; the detonation device can detonate an explosive in the second explosive cartridge, so that a local explosion hole cavity is formed in the stratum, andthe detonation device can be automatically opened to form a reversed claw type structure; and after anchor rod prestress is applied, the local explosion hole cavity, free section drilling holes and rock-soil body fractures around the drilling holes can be sealed through grouting of the outer section hollow rod body so as to form a full-length prestress anchoring supporting effect.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering anchoring, in particular to a full-length prestressed anchoring and grouting support device and a process that can be combined to expand internal anchoring bodies. Background technique [0002] With the rapid development of geotechnical engineering, anchoring technology has become an important branch. The rock-soil anchoring technology can fully excavate the rock-soil energy, use the rock-soil's own strength and self-bearing capacity, greatly reduce the structure's self-weight, save engineering materials, achieve significant economic results, and ensure construction safety and engineering stability. It is widely used in slopes Engineering fields such as protection, foundation pit, tunnel, dam body, wharf, subway, underground space engineering and tension foundation. [0003] However, there are still many problems to be solved urgently in the traditional bolting technology in weak...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in the weak formation, the traditional bolt support has poor anchorability and low anchoring force, and cannot effectively control the weak formation, so that the support potential of the bolt body cannot be fully exerted

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