Back analysis of geostress field of deep river valley region - a case study for Laxiwa hydropower project with high stress, China

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	Back analysis of geostress field of deep river valley region - a case study for Laxiwa hydropower project with high stress, China
	Yuan, Fengbo; Liu, Jian; Feng, Xia-Ting; Qiao, Liping
	2006
会议日期	JUN 19-21, 2006
会议地点	Trondheim, NORWAY
页码	433
英文摘要	The Laxiwa hydropower project located at the Yellow River consists of a high concrete arch dam and a large-scale underground powerhouse. Geological investigations show that strong tectonic movement and river erosion make a complicated geostress regime at dam site with appearance of high stress and discal cores in boreholes. This poises the potential rockburst and instability of both the dam foundation and underground powerhouse during excavation. For obtaining the prior knowledge of the stress field, in this study, back analysis of geostress of this deep valley region is conducted based on in-situ stress measurements. The distribution characterization of geostress is discussed, including stress concentration of valley bottom, variation of stress with horizontal and vertical depth, as well as partitioning zones of stress, etc. Besides, comparison of magnitude and direction of measured and computed geostress at corresponding points in rock masses is also carried out, demonstrating a good agreement. The results are of significance not only for the design of support system for the underground cavern, but also for the reinforcement in the dam foundation.
会议录	IN-SITU ROCK STRESS MEASUREMENT, INTERPRETATION AND APPLICATION
会议录出版者	TAYLOR & FRANCIS LTD
会议录出版地	LONDON
语种	英语
WOS研究方向	Engineering
WOS记录号	WOS:000242794100054
内容类型	会议论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4439]
专题	岩土力学所知识全产出_会议论文岩土力学所知识全产出
作者单位	Chinese Acad Sci, Inst Rock & Soil Mech
推荐引用方式 GB/T 7714	Yuan, Fengbo,Liu, Jian,Feng, Xia-Ting,et al. Back analysis of geostress field of deep river valley region - a case study for Laxiwa hydropower project with high stress, China[C]. 见:. Trondheim, NORWAY. JUN 19-21, 2006.