Fusion structure of umbrella-shaped body expanding device and easy-to-cut anchor rod or recoverable anchor rod cable

Abstract

The invention discloses a fusion structure of an umbrella-shaped body expanding device and an easy-to-cut anchor rod or a recoverable anchor rod cable. An umbrella-shaped expanding head technology andan easy-to-cut anchor rod or recoverable anchor rod cable technology are subjected to various variable structure fusion, so that an umbrella-shaped expanding head can be mutually mounted and introduced with the easy-to-cut anchor rod or the recoverable anchor cable; the original friction type easy-to-cut anchor rod and recoverable anchor rod cable is transformed into an end bearing type anchor rod cable; the bearing capability and the anti-deformation capability of the easy-to-cut anchor rod and the recoverable anchor rod cable are greatly improved; the original single bearing structure of the umbrella-shaped expanding head is broken through; the conservative mode that an inner anchor head can only be arranged at the front side of a rib pulling disc is changed; various umbrella-shaped body expanding structure types are added; the two conditions that the inner anchor head is positioned between the rib pulling disc and a rib penetrating disc and is positioned behind the rib penetratingdisc are included; and the sufficient and free selection is provided for various recoverable anchor cables to find a combining part with the umbrella-shaped expanding head.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a fusion structure of an umbrella-shaped expansion device and a free-cutting bolt or a recyclable bolt cable. Background technique [0002] With the rapid development of rail transit construction in major cities, due to the large and dense steel components such as steel pipes, steel bars, and anchor rods and anchor cables made of steel strands, it is difficult for the shield machine to cut, which is easy to cause The failure of the screw conveyor and the drive system of the cutter head will lead to excavation construction and environmental safety accidents. In order to solve this contradiction, some provincial capitals have banned the use of foundation pit bolts and cables, which makes the geotechnical anchoring technology develop in an environmentally friendly direction. Thereby, two types of recyclable anchor bars and easy-cut anchor bars are derived. [0003] Easy-cutt...

AI Technical Summary

Problems solved by technology

[0007] In addition, in order to become an enlarged head anchor to increase the bearing capacity of the various enlarged head anchor cables, various hole reaming measures were taken. In this way, not only the bearing capacity is not increased much, but also the centering support cannot be set like the non-anchor section, which causes the problem of the inner anchor head falling. No matter what method of recovery, the falling head will make the recovery of the anchor reinforcement more difficult and reduce the The recovery rate of the anchor reinforcement is improved, especially the mechanical recovery method

[0008] From the perspective of the umbrella-shaped expanding head, although it is another development direction of rock-soil anchoring technology, the umbrella-shaped expanding head series anchoring technology has solved the problem of anchoring types such as traditional tension type, pressure type, and dispersed pressure type, or capsule type without ribs. Or problems such as low bearing capacity, large deformation, large creep, and low reliability of the anchorage type of the enlarged head with invalid ribs, such as the prior application (CN109518690A, CN209585034U, CN110552348A) of the applicant in this case, but with the urban foundation pit anchorage field is facing The problem of environmental friendliness is becoming more and more prominent, and the application of various recyclable anchor cables is becoming more and more common. When facing the problem of how to connect the structure when applying the umbrella-shaped expanding head technology, there has been no specific implementation plan before. At the same time, the umbrella-shaped expanding The structure of the head itself also needs to be adjusted accordingly to fully meet the corresponding preconditions for shield machine construction

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