Stability analysis of statically indeterminate blocks in key block theory and application to rock slope in Jinping-I Hydropower Station

doi:10.1016/j.enggeo.2014.09.012

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	Stability analysis of statically indeterminate blocks in key block theory and application to rock slope in Jinping-I Hydropower Station
	Sun, Guanhua 1; Zheng, Hong 1; Huang, Yaoying 2
刊名	ENGINEERING GEOLOGY
	2015
卷号	186 页码:57-67
关键词	Block theory 3-Dimensional rigorous limit equilibrium method Stability analysis Jinping-I Hydropower Station
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2014.09.012
英文摘要	Using the movability analysis in block theory, one can easily determine all movable blocks. However, only for a movable block with no more than two structural surfaces, called the statically determinate block, can the factor of safety be determined by the static analysis, which limits more extensive application of key block theory. In order to analyze general movable blocks with multiple structural planes, an optimization model for solving the safety factor of blocks is built in this paper. In the model, the safety factor as well as the normal stress on the slip surface is taken as independent variables; and the objective function is specified as the safety factor alone. The statically admissible conditions include the system of equilibrium equations, non-negativity of both normal stress on the slip surface and thrust inside the block. Since the objective function is linear and the constraint functions are polynomials of no more than degree-2, it is weak in nonlinearity and can be solved by those conventional optimization techniques, and disadvantages of the conventional block theory are overcome. After some typical examples are tested, the stability of the left bank rock slope ofjinping-I Hydropower Station is conducted in detail, and the stability evolution due to excavation is systematically studied by this method. (C) 2014 Elsevier B.V. All rights reserved.
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000351649500007
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3688]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 2.China Three Gorges Univ, Coll Hydraul & Environm Engn
推荐引用方式 GB/T 7714	Sun, Guanhua,Zheng, Hong,Huang, Yaoying. Stability analysis of statically indeterminate blocks in key block theory and application to rock slope in Jinping-I Hydropower Station[J]. ENGINEERING GEOLOGY,2015,186:57-67.
APA	Sun, Guanhua,Zheng, Hong,&Huang, Yaoying.(2015).Stability analysis of statically indeterminate blocks in key block theory and application to rock slope in Jinping-I Hydropower Station.ENGINEERING GEOLOGY,186,57-67.
MLA	Sun, Guanhua,et al."Stability analysis of statically indeterminate blocks in key block theory and application to rock slope in Jinping-I Hydropower Station".ENGINEERING GEOLOGY 186(2015):57-67.