Stress-dependency of slope stability in embankment dams
1995
Morii, T. (Tottori Univ. (Japan). Faculty of Agriculture) | Hattori, K. | Hussein, A.K.H.
Slope stability has traditionally been and is still a subject of interest in geotechnical engineering. Although limit equilibrium procedures of the slope stability analysis have been widely and successfully used, these may have a limitation that they cannot take account of an effect of stress distributions mobilized within the slope on the stability. In the present study, a method of the slope stability analysis based on a stress-deformation analysis using a finite element method is proposed and an stress-dependency of the slope stability of embankment dams is investigated by using the method proposed. Three main findings were identified in the present study: (1) the slope stability of embankment dams depends only on the Poisson's ratio irrespective of the modulus of elasticity; (2) the factor of safety increases with increasing value of the Poisson's ratio because the minor principal tresses increase with the major ones remaining almost invariant; and (3) the stress-dependent factor of safety is considerably larger than the value calculated by the Bishop's simplified method which has been widely sued in the geotechnical engineering
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