NDLI: A method combining numerical analysis and limit equilibrium theory to determine potential slip surfaces in soil slopes

Content Provider	Springer Nature Link
Author	Xiao, Shiguo Yan, Liping Cheng, Zhiqiang
Copyright Year	2011
Abstract	This paper describes a precise method combining numerical analysis and limit equilibrium theory to determine potential slip surfaces in soil slopes. In this method, the direction of the critical slip surface at any point in a slope is determined using the Coulomb’s strength principle and the extremum principle based on the ratio of the shear strength to the shear stress at that point. The ratio, which is considered as an analysis index, can be computed once the stress field of the soil slope is obtained. The critical slip direction at any point in the slope must be the tangential direction of a potential slip surface passing through the point. Therefore, starting from a point on the top of the slope surface or on the horizontal segment outside the slope toe, the increment with a small distance into the slope is used to choose another point and the corresponding slip direction at the point is computed. Connecting all the points used in the computation forms a potential slip surface exiting at the starting point. Then the factor of safety for any potential slip surface can be computed using limit equilibrium method like Spencer method. After factors of safety for all the potential slip surfaces are obtained, the minimum one is the factor of safety for the slope and the corresponding potential slip surface is the critical slip surface of the slope. The proposed method does not need to pre-assume the shape of potential slip surfaces. Thus it is suitable for any shape of slip surfaces. Moreover the method is very simple to be applied. Examples are presented in this paper to illustrate the feasibility of the proposed method programmed in ANSYS software by macro commands.
Starting Page	718
Ending Page	727
Page Count	10
File Format	PDF
ISSN	16726316
Journal	Journal of Mountain Science
Volume Number	8
Issue Number	5
e-ISSN	19930321
Language	English
Publisher	SP Science Press
Publisher Date	2011-09-17
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Soil slope Stress field Potential slip surface Slope stability Factor of safety Numerical analysis Limit equilibrium method ANSYS software Ecology Environment Earth Sciences Geography (general)
Content Type	Text
Resource Type	Article
Subject	Earth-Surface Processes Geography, Planning and Development Geology Global and Planetary Change Nature and Landscape Conservation

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