雁门关隧道大变形突泥段地质结构与力学分析

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Abstract Yanmenguan tunnel is located in the Hengshan metamorphic area，which is controlled by strike-slip structures. During construction，large deformation and sudden mud bursting often happened，especial in the section of DK118+30.0–DK118+200.0. Based on analyses and numerical simulations of bias pressure feature of strike-slip faults，and monitoring of stress and deformation，it is found that：(1) The section of DK118+30.0–DK118+200.0 is controlled by the strike-slip structures. (2) The dominant factor for bias pressure of deep tunnel is the difference of surrounding rock class，and the bias pressure affects the subsidence of surrounding rocks obviously. (3) The failure mechanism of surrounding rocks of Yanmenguan tunnel is interlayer shear and compression. It is suggested that the stress of surrounding rocks and the difference in rock properties should be considered during design and construction of tunnels in metamorphic area，and construction technologies should be accordingly changed.

Key words： tunneling engineering Yanmenguan tunnel strike-slip fault bias pressure large deformation mud bursting

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	Articles by authors
	LIN Daming1
	2
	SHANG Yanjun1
	CHEN Mingxing3
	QIAO Guanghong4
	WANG Kaiyang1
	2

Cite this article:

LIN Daming1,2,SHANG Yanjun1, et al. Geological structures and MECHANICal ANALYSIS OF LARGE- DEFORMATION MUD BURSTING SECTION IN YANMENGUAN TUNNEL[J]. , 2012, 31(S1): 2751-2757.

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https://rockmech.whrsm.ac.cn/EN/Y2012/V31/IS1/2751

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