Study on the mechanisms of flexural toppling failure in anti-inclined rock slopes using numerical and limit equilibrium models

doi:10.1016/j.enggeo.2018.02.006

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Study on the mechanisms of flexural toppling failure in anti-inclined rock slopes using numerical and limit equilibrium models
	Zheng, Yun 1; Chen, Congxin 1; Liu, Tingting 1,3; Zhang, Haina 1; Xia, Kaizong 1; Liu, Feng 2
刊名	ENGINEERING GEOLOGY
	2018
卷号	237 页码:116-128
关键词	Slope stability analyses Anti-inclined rock slope Flexural toppling UDEC Trigon approach Limit equilibrium method
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2018.02.006
英文摘要	Flexural toppling failure (FTF) is one of the main types of toppling failures and frequently occurs in anti-inclined rock slopes. A new UDEC Trigon approach for simulating FTF of a model slope was presented in this paper. FTF of anti-inclined rock slopes characterized by tensile failure of rock columns was successfully captured with the new method. Subsequently, special effort was made to investigate the effects of joint cohesion and joint friction angle on flexural toppling movements' mechanisms. Furthermore, a limit equilibrium method, which can reflect the effects of the joint cohesion, was proposed to quantitatively evaluate the stability of anti-inclined rock slopes against FTF. The results demonstrate that the deformation process of FTF can be divided into three stages: elastic deformation due to cohesion, development of FTF after interlayer slip, and formation of the total failure surface. The inter-column normal forces will suddenly decrease when the failure surface begins to initiate inside the slope, which can be regarded as an instability indicator of anti-inclined rock slopes against FTF. Joint cohesion and joint friction angle were found to have significant effects on the stability of anti-inclined rock slopes, but make an insignificant impact on the shape, location, and formation process of the failure surface. The simulated results indicate that joint cohesion should be considered when using the limit equilibrium method to evaluate the stability of anti-inclined rock slopes against FTF. Inaccurate result will be predicted if the joint cohesion is neglected in the limit equilibrium method.
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000430780300011
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4261]
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.Tianjin Univ, Sch Civil Engn 3.Wuhan Univ Technol, Key Lab Roadway Bridge & Struct Engn ;
推荐引用方式 GB/T 7714	Zheng, Yun,Chen, Congxin,Liu, Tingting,et al. Study on the mechanisms of flexural toppling failure in anti-inclined rock slopes using numerical and limit equilibrium models[J]. ENGINEERING GEOLOGY,2018,237:116-128.
APA	Zheng, Yun,Chen, Congxin,Liu, Tingting,Zhang, Haina,Xia, Kaizong,&Liu, Feng.(2018).Study on the mechanisms of flexural toppling failure in anti-inclined rock slopes using numerical and limit equilibrium models.ENGINEERING GEOLOGY,237,116-128.
MLA	Zheng, Yun,et al."Study on the mechanisms of flexural toppling failure in anti-inclined rock slopes using numerical and limit equilibrium models".ENGINEERING GEOLOGY 237(2018):116-128.