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	Study of the horizontal crack of hard rock or sprayed concrete on high sidewall of large underground cavern
	Jiang, Q.1; Feng, X. T.1; Shi, C. P.1; Jing, C.1; Jiang, Y. J.2
	2012
会议日期	OCT 14-16, 2011
会议地点	Beijing, PEOPLES R CHINA
页码	21-26
英文摘要	During the construction of underground engineering horizontal or nearly horizontal cracks have been observed usually on the surface of high sidewall in large underground cavern, which would influence the local stability. The creaking mechanism on high sidewall of large cavern was studied through the case study of Laxiwa underground main powerhouse. By the numerical simulation of cavern opening, the changing of displacement and stress of rock were revealed. And the results indicated that the surface rock of high sidewall goes through the sharp displacement release and stress unloading. Several main factors which could induce cracks of sidewall have been summarized, including hard rock mass with very low tension strength, caver profile with large erective surface, considerable displacement of rock mass at high sidewall and redistributed stress state with tension stress. And an index considering unload strain energy (USE) was introduced to evaluate the intensity and depth of crack on high sideward. Some engineering measurements were discussed also to deal with cracking of high sidewall.
源文献作者	Cai, M
会议录	ROCK MECHANICS: ACHIEVEMENTS AND AMBITIONS
会议录出版者	CRC PRESS-TAYLOR & FRANCIS GROUP
会议录出版地	BOCA RATON
语种	英语
WOS研究方向	Engineering
WOS记录号	WOS:000347395400004
内容类型	会议论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4654]
专题	岩土力学所知识全产出_会议论文 国家重点实验室知识产出_会议论文
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 2.Nagasaki Univ, Fac Engn, Dept Civil Engn
推荐引用方式 GB/T 7714	Jiang, Q.,Feng, X. T.,Shi, C. P.,et al. Study of the horizontal crack of hard rock or sprayed concrete on high sidewall of large underground cavern[C]. 见:. Beijing, PEOPLES R CHINA. OCT 14-16, 2011.

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