Large-deformation pre-stressed anchor bolt

A prestressed, large deformation technology, applied in the installation of bolts, mining equipment, earthwork drilling and mining, etc., can solve the problems of poor anchoring effect, inconvenient construction, complex structure, etc., and achieve convenient installation, low cost, and good working mechanical properties Effect

Active Publication Date: 2014-02-26
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition to the above research and results, there are still many researches and products on large-deformation prestressed anchor rods that have not been retrieved. However, due to the complex structure, poor anchoring effect and inconvenient construction, these anchor rods have not been popularized and applied in engineering.

Method used

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  • Large-deformation pre-stressed anchor bolt
  • Large-deformation pre-stressed anchor bolt
  • Large-deformation pre-stressed anchor bolt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The following combination Figure 2 to Figure 5 , the present invention is further described:

[0029] Depend on figure 2 It can be seen that a large deformation prestressed anchor rod includes a slotted capped cylinder 1 , a tapered wedge 2 , a gasket 3 , a lock nut 4 , and an anchor rod body 5 . The anchor rod body 5 passes through the slotted capped cylinder 1, the tapered wedge 2, the gasket 3, and the lock nut 4 in sequence, the slotted capped cylinder 1 is embedded in the drilling hole, and the slotted capped cylinder 1 Matching with the tapered wedge 2 through frictional contact, the front end of the tapered wedge 2 is inserted into the slotted capped cylinder 1, and finally locked and fixed by the washer 3 and the lock nut 4 from the outside.

[0030] Depend on image 3 It can be seen that the anchor rod body 5 includes an anchor segment 5A, a free segment 5B and an outer anchor segment 5C. The anchoring section 5A is connected with the free section 5B, and...

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Abstract

The invention discloses a large-deformation pre-stressed anchor bolt which comprises a slotted capped cylinder, a tapered wedge, a gasket, a locking nut and an anchor bolt body. The anchor bolt body penetrates the slotted capped cylinder, the tapered wedge, the gasket and the locking nut sequentially. The slotted capped cylinder is embedded into the mouth of a drilled hole and is matched with the tapered wedge though frictional contact. The front end of the tapered wedge is inserted into the slotted capped cylinder and is locked and fixed by the gasket and the locking nut from the outside. The anchor bolt body is a threaded solid rebar or hollow steel tube. One end of the anchor bolt body is twisted or linear, the middle of the anchor bolt body is sinusoidal-wave-shaped, and the other end of the anchor bolt body is provided with an outer thread. The large-deformation pre-stressed anchor bolt is simple in structure, convenient to operate, high in deformability, looseness resistant, good in working mechanical property, low in cost, easy to process, convenient to mount and especially applicable to underground constructions such as coal mines and tunnels.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering anchoring, and more specifically relates to a large-deformation prestressed anchor rod, which is suitable for coal mines, highway tunnels and slope engineering, and other geotechnical engineering involving weak rock mass anchoring and support, and can be used in surrounding areas. Maintaining a certain anchoring force in the case of large deformation of the rock is conducive to the lasting safety and effectiveness of the anchorage support system. Background technique [0002] During the production and construction of deep underground projects such as coal mines and tunnels, support problems for weak surrounding rocks are often encountered. Due to the large deformation of soft rocks under the action of high ground stress and the long duration, more support measures have been put forward. high demands. At present, anchor bolts are often used to reinforce surrounding rock in enginee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00E21D20/00
Inventor 戴永浩陈卫忠杨建平伍国军田洪铭
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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