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Behaviour of Slopes under Static and Seismic Conditions by Limit Equilibrium Method
In the present paper, the sliding soil mass of a generalized earth slope is divided into a number of vertical slices considering the interfacial forces between two consecutive slices, and using the limit equilibrium analysis for these slices under the influence of static forces along with the pseudo-static seismic forces to obtain the dynamic factor of safety of the slopes. The effects of variation of different parameters like slope angle (β), soil friction angle (φ) and seismic acceleration coefficients both in the horizontal and vertical directions (kh and kv) on the dynamic factor of safety (DFS) are presented. A detailed analysis shows that the DFS increases with increase in the soil friction angle. The DFS decreases with the increase in slope angle under seismic conditions and it also drastically decreases with increase in both the horizontal and vertical seismic accelerations acting on the slope which finally leads to the instability of the slope when the factor of safety gets reduced below 1.0. Finally the present results are compared to the existing solutions available in literature and found to give the minimum values of dynamic factor of safety using the present approach for seismic slope stability analysis.
Behaviour of Slopes under Static and Seismic Conditions by Limit Equilibrium Method
In the present paper, the sliding soil mass of a generalized earth slope is divided into a number of vertical slices considering the interfacial forces between two consecutive slices, and using the limit equilibrium analysis for these slices under the influence of static forces along with the pseudo-static seismic forces to obtain the dynamic factor of safety of the slopes. The effects of variation of different parameters like slope angle (β), soil friction angle (φ) and seismic acceleration coefficients both in the horizontal and vertical directions (kh and kv) on the dynamic factor of safety (DFS) are presented. A detailed analysis shows that the DFS increases with increase in the soil friction angle. The DFS decreases with the increase in slope angle under seismic conditions and it also drastically decreases with increase in both the horizontal and vertical seismic accelerations acting on the slope which finally leads to the instability of the slope when the factor of safety gets reduced below 1.0. Finally the present results are compared to the existing solutions available in literature and found to give the minimum values of dynamic factor of safety using the present approach for seismic slope stability analysis.
Behaviour of Slopes under Static and Seismic Conditions by Limit Equilibrium Method
Choudhury, Deepankar (author) / Basu, Somdatta (author) / Bray, Jonathan D. (author)
Geo-Denver 2007 ; 2007 ; Denver, Colorado, United States
2007-10-14
Conference paper
Electronic Resource
English
Dams , Failures , Seismic effects , Louisiana , Slopes , Embankments , Equilibrium
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