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Tunnel face anchor rod support design method

A bolt support and design method technology, applied in computer-aided design, calculation, mining equipment, etc., can solve problems such as lack of theoretical support, threat to construction safety, and large safety reserves

Inactive Publication Date: 2019-09-24
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The use of GFRP bolts to strengthen the tunnel face is a commonly used advance support measure in tunnel engineering, but there is no relevant design specification, and at present, the support parameters are mostly determined according to engineering experience, lacking theoretical support, which may lead to large safety reserves or support. Insufficient maintenance parameters threaten construction safety and cause waste of resources

Method used

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  • Tunnel face anchor rod support design method
  • Tunnel face anchor rod support design method
  • Tunnel face anchor rod support design method

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Embodiment 1

[0042] The large-scale mechanized full-section construction method has become the development direction of the high-speed railway tunnel construction method. Full-section excavation has few disturbances to the surrounding rock, simple procedure, and high construction efficiency, but the excavation area is large, and the tunnel face is prone to instability and collapse. Under rock conditions, the traditional step method is mainly used. Face bolt support is a commonly used advance support measure in tunnel engineering at present, but there is no relevant design specification. At present, the support parameters are mostly determined according to engineering experience, lacking theoretical support, and the GFRP bolt support on the tunnel face cannot be adjusted. Quantitative design. It may lead to large safety reserves or insufficient support parameters, threatening construction safety and causing waste of resources.

[0043] Glass fiber reinforced plastic (English: Glass-Fiber ...

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Abstract

The invention provides a tunnel face anchor rod support design method, and belongs to the field of tunnel engineering. In the design method of the tunnel face anchor rod, a tunnel face damage mode under a mechanized full-section construction method is considered; meanwhile, five tensile failure modes of the GFRP anchor rod of the tunnel face and influences of reinforcing parameters such as the diameter of the anchor rod, the reinforcing density, the initial length, the lap joint length, the tensile strength of the anchor rod, the shear strength of an anchor rod-grouting body interface and the shear strength of a grouting body-surrounding rock interface are considered; and a tunnel face stability coefficient calculation formula is deduced by adopting an extreme balance method, and the GFRP anchor rod quantitative design of the tunnel face is achieved.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to a method for designing tunnel face bolt support. Background technique [0002] The use of GFRP bolts to strengthen the tunnel face is a commonly used advance support measure in tunnel engineering, but there is no relevant design specification, and at present, the support parameters are mostly determined according to engineering experience, lacking theoretical support, which may lead to large safety reserves or support. Insufficient maintenance parameters threaten construction safety and cause waste of resources. Contents of the invention [0003] An embodiment of the present invention provides a design method for tunnel face bolt support, aiming at realizing the quantitative design of tunnel face bolt support and providing theoretical support for the determination of tunnel face bolt support parameters. [0004] An embodiment of the present invention provides a tunnel face bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50E21D11/00
CPCE21D11/003G06F30/17
Inventor 王明年张宵刘大刚童建军赵思光王志龙姚萌杨涅张艺腾
Owner SOUTHWEST JIAOTONG UNIV
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