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Tunnel face grouting parameter design method

A parameter design and tunnel face technology, applied in mining equipment, earthwork drilling, wellbore lining, etc., can solve the problems of large safety reserves, lack of theoretical support, and no design specifications

Inactive Publication Date: 2019-09-27
CHINA RAILWAYS CORPORATION +2
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Problems solved by technology

[0002] Grouting support for the tunnel face is a commonly used advance support measure in tunnel engineering at present, but there is no relevant design specification. At present, the grouting parameters are mostly determined according to engineering experience, lacking theoretical support, which may lead to a large safety reserve or grouting Insufficient parameters threaten construction safety and waste resources

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Embodiment

[0028] 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. Pre-grouting of the tunnel face is currently a commonly used advance support measure in tunnel engineering, but there is no relevant design specification. At present, the grouting parameters are mostly determined according to engineering experience, lacking theoretical support, which may lead to large safety reserves or grouting parameters. Insufficient, threatening construction safety and causing waste of resources.

[0029] Reasonable tunnel face grouting parameters can effectively improve the stability of the tunnel face, and can also reduce ...

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Abstract

The invention provides a tunnel face grouting parameter design method and belongs to the field of tunnel engineering. According to the tunnel face grouting parameter design method, the damage mode of a tunnel face under a mechanized full-section working method is considered, a calculation formula for the cohesive force increasing coefficient alpha1 of surrounding rock in front of the tunnel face after grouting is derived through a volume equivalence method, and a calculation method for the stabilization coefficient of the tunnel face is derived through a limit equilibrium method, so that quantitative design of grouting parameters of the tunnel face of a tunnel is realized.

Description

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

Claims

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Application Information

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IPC IPC(8): E21D11/10E21F17/18
CPCE21D11/10E21F17/18
Inventor 王志坚王明年杨友元王毅东金强国李双将张宵刘大刚
Owner CHINA RAILWAYS CORPORATION
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