Infinite slope is the simplest limit equilibrium method for slope stability analysis. , It is a 2D slope stability analysis like all limit equilibrium method. Hutchinson and Bhandari (1985) improved this approach taking into account lateral shear effects using a landslide cross section of rectangular form. , This paper introduces a new model built up using a more realistic elliptical landslide cross section. Safety factors based on this model are sometimes really different from those of classic infinite slope model. This proves that the 2D infinite slope stability method could be sometimes too conservative if the landslide cross section is not too large compared to landslide depth. A further interesting result is related to the involvement of boundary strength. If cohesion is different than zero, contrarily to classic 2D analysis, there is a particular depth where the factor of safety has a minimum value. This can be considered a sort of “critical depth”, for channelized prevailing longitudinal dimension landslide, that is a function of mechanical characteristics of the soil and of the width of the landslide body.
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|Titolo:||Boundary effects and critical depth in infinite slope stability analysis|
|Data di pubblicazione:||2010|
|Nome del convegno:||11th I.A.E.G. Congress|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|