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Anchor rod cable system cooperative bearing performance testing device and method

A test device and a technology of anchor cables, which are applied in the field of collaborative load-bearing performance test devices, can solve problems such as the design of anchor cable parameters in large-deformation tunnels, and achieve the effects of effectively guiding on-site construction, convenient operation, and weakening friction

Active Publication Date: 2020-10-23
STATE KEY LAB OF SHIELD & TUNNELING TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem: The purpose of the present invention is to provide a device and method for testing the cooperative bearing performance of the anchor cable system in view of the technical problems of large deformation tunnel support and the design problems of the anchor cable parameters in the prior art

Method used

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  • Anchor rod cable system cooperative bearing performance testing device and method
  • Anchor rod cable system cooperative bearing performance testing device and method
  • Anchor rod cable system cooperative bearing performance testing device and method

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Experimental program
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Embodiment 1

[0043] Embodiment 1, the horizontal spacing of the guide rail 1-1 is 0.5m, the vertical spacing of the guide rail 1-1 is 0.5m, the length of the guide rail 1-1 is 10m, and the rigidity of the guide rail 1-1 is the anchor rod 2-1 and the anchor cable 10 times the rigidity of anchor rod 3-1; the rigidity of anchor rod limiter 2-3 is 10 times that of anchor rod 2-1; the rigidity of anchor cable limiter 3-3 is that of said anchor cable 3-1 10 times the stiffness; the stiffness of the traction frame 4-2 needs to meet the two conditions of 10 times the stiffness of the anchor rod 2-1 and more than 10 times the stiffness of the anchor cable 3-1.

[0044] In specific implementation,

[0045] 1) A tunnel support is designed with a bolt length of 2.6m, a diameter of 25mm, and an anchorage length of 1.8m, using a 150×150×8mm butterfly tray with a pre-tightening force of 80kN; an anchor cable length of 6.3m, a diameter of 17.8mm, and an anchorage length of 1.7 m, preload 100kN. Comparin...

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Abstract

The invention discloses an anchor rod and cable system cooperative bearing performance testing device and method, and belongs to the technical field of large-deformation tunnel surrounding rock supporting. The design problem of anchor rod and cable cooperative support for tunnel surrounding rock deformation control is solved. The device comprises a guide rail component, an anchor rod anchoring body, an anchor cable anchoring body and a traction system. During implementation, variables which influence the cooperative bearing performance of the anchor rod and the anchor cable and need to be studied are determined, the anchor rod anchoring body and the anchor cable anchoring body are installed, and the traction system is used for synchronously stretching the anchor rod and the anchor cable. The cooperative bearing performance of the anchor rod cable is evaluated according to the failure position, sequence and mode of the anchor rod cable anchoring system and the stress and deformation characteristics. The device is simple in structure and convenient to operate, the defects of bearing performance experiment research of a traditional single anchor rod or anchor cable are overcome, the purpose of anchor rod and anchor cable cooperative bearing performance testing is achieved, the indoor anchor rod and anchor cable cooperative bearing experiment environment is close to the field height, and field construction can be guided more scientifically and effectively.

Description

technical field [0001] The invention relates to a cooperative bearing performance testing device and method, in particular to a bolt cable system cooperative bearing performance testing device and method suitable for the technical field of large-deformation tunnel surrounding rock support. Background technique [0002] In traffic, water conservancy, and mine tunnels buried deep in soft and broken rock formations, the stability of the surrounding rock is poor, and large deformation disasters occur frequently. Common support technologies include lining, steel arch, anchor cable, etc. The concept of bolt-cable joint support technology is to give full play to the respective advantages of the bolt and the anchor cable. In the initial stage of tunnel excavation and support, the flexible support of the bolt is mainly used, and the suspension function of the anchor cable is mainly used in the later stage. . The two are not combined to strengthen the support at the same time, but c...

Claims

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Application Information

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IPC IPC(8): G01M99/00
CPCG01M99/007
Inventor 潘东江洪开荣孙振川周建军张兵杨延栋赵海雷秦银平陈桥王利明韩伟锋杨振兴李宏波
Owner STATE KEY LAB OF SHIELD & TUNNELING TECH
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