深部隧洞裂隙围岩渗透特性及衬砌外水压力变化规律

doi:10.13722/j.cnki.jrme.2017.0843

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Abstract High hydraulic pressure is one of the key factors that affect the stability of surrounding rock and safety of lining structures during the excavation process. In the paper，the analytical solution for the external hydraulic pressure acting on the tunnel lining under the different permeability of surrounding rock and lining were derived based on the classical percolation theory of fractured media. The numerical method was used to simulate the properties of high external hydraulic pressure acting on the lining of deep-buried tunnel. The variation of seepage field caused by the changing of rock mass and lining coefficients，and the relationships among the external hydraulic pressure and rock mass，lining and drainage measures were discussed. Results indicated that the ratio of permeability coefficients of rock and lining is a significant factor. The correct grouting and drainage designs affect greatly the reduction coefficient of external hydraulic pressure on linings.

Key words： rock mechanics lining fractured rock mass external hydraulic pressure seepage field permeability coefficient

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	Articles by authors
	WANG Kezhong1
	NI Shaohu2
	WU Hui1

Cite this article:

WANG Kezhong1,NI Shaohu2,WU Hui1. Seepage properties and external hydraulic pressure acting on tunnel lining in fractured rock around deep-buried tunnel[J]. , 2018, 37(1): 168-176.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2017.0843 OR http://www.rockmech.org/EN/Y2018/V37/I1/168

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