New Method for 3D and Asymmetrical Slope Stability Analysis
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 126, Issue 10
Abstract
A new three-dimensional (3D) slope stability analysis method is developed based on two-directional moment equilibrium. This method calculates not only the safety factor but also the possible direction of sliding for semispherical and composite failure surfaces. As a result, the possible errors associated with assuming a plane of symmetry in 3D stability analyses are eliminated. Another advantage of the new method is to eliminate the tedious work on the coordinate transformation prior to the analysis. Two examples of symmetrical failure surfaces are used to verify the basic formulation in the present study. Three additional examples further demonstrate the applicability of the proposed method in analyzing 3D asymmetrical failure surfaces. An analysis on a slope, subject to asymmetrical excavation unloading and geological conditions, shows that using the method of one-directional moment equilibrium may give an overestimated safety factor of the slope.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 126 • Issue 10 • October 2000
Pages: 917 - 927
History
Received: Jan 27, 1999
Published online: Oct 1, 2000
Published in print: Oct 2000
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