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Abstract
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This paper aims to investigate the effect of anisotropy of shear strength parameter on the stability of a sandy slope by performing the limit equilibrium analysis. Because of scarcity of mathematical equation for anisotropic friction angle of sand,atfirst,allresultsofprincipalstressrotationtestsareprocessedbyartificialneural network and a computational procedure is developed for determining sand friction angle subjected to various loading directions. By implementing this procedure, slope stabilityanalysisisperformedinbothisotropicandanisotropicconditions.Theresults indicate that while isotropic slope stability overestimates the factor of safety between 5 and 25% which the deviation is more for flatter slope, the location of critical slip surface is coincident in both conditions. Also in specific slip surface, the parameters of face angle, geometry of slip surface and soil properties relating to anisotropy are the main factors governing the result of anisotropic slope stability.
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