Probability and Sensitivity Analysis of the Slope Stability of Naulong Dam
Abstract
Slope stability analysis was carried out for an earthfill dam having a sloping core. From the analysis, it was concluded that the pseudostatic case is critical for this dam. A probability and sensitivity analysis was carried out for some of the cases to assess probability of failure. The materials in the zoned embankment were assigned some variation for the probability analysis which showed that some slip surfaces had a probability of failure which is much greater than an acceptable limit. From the sensitivity analysis it was concluded that the variation in friction angle of the shell material affects the factor of safety more than any other material parameter and variation tried. To get a probability of failure within selected limits the probability analysis was carried out on revised downstream slopes to see the difference in probability of failure after the slopes are flattened from 1.75H:1V to 2H:1V and 2.25H:1V.References
A.H. Malkawi, W.F Hassan and F.A. Abdulla, (2000), Uncertainty and reliability analysis applied to slope stability, Structural Safety, No.22, pp: 61-187.
Banaki R., Ahmad F., Tabarroki M., Yahaya A. S. 2013. Probabilistic Analyses of Slopes: A State of the Art Review. International Journal of Current Engineering and Technology. Vol. 3 (1). pp 58-63.
D. G. Fredlund and J. Krahn 1977. Comparison of slope stability methods of analysis. Canadian Geotechnical journal. Vol. 14. pp. 429-439.
D.V. Griffiths, and G.A. Fenton, (2004), Probabilistic slope stability analysis by finite elements Journal of Geotechnical and Geo environmental Engineering, No.130, pp: 507- 518.
El-Ramly, H., Morgenstern, N.R., Cruden, D.M. 2002. Probabilistic Slope Stability Analysis for Practise. Canadian Geotechnical Journal. Vol. 39. pp. 665-683.
GEO-SLOPE. Slope/W for slope stability analysis. Version 5. Calgary, Alberta: GEOSLOPE International Limited; 2002.
J. Ching, K.K. Phoon, and Y.G. Hu (2010), Observations on Limit Equilibrium–Based Slope Reliability Problems with Inclined Weak Seams, Journal of Engineering Mechanics, No.10, 136, pp:1220-1233.
Santamarina, L.C., Altschaeffl, A.G. and Chameau, J.L.,1992. “Reliability of Slopes: Incorporating Qualitative Information.” Transportation Research Board, TRR 1343.
SLIDE for slope stability analysis. Toronto, Ontario: Rocscience Inc.
Spencer, E. 1967. A method of analysis of the stability of embankments assuming parallel inter-slice forces. Geotechnique, 17, pp. 11-26.
USACE, United States Army Corps of Engineers, (2003). Slope Stability, Engineering Manual 1110-2-1902, Department of the Army, Corps of Engineers, Washington, D. C.
Banaki R., Ahmad F., Tabarroki M., Yahaya A. S. 2013. Probabilistic Analyses of Slopes: A State of the Art Review. International Journal of Current Engineering and Technology. Vol. 3 (1). pp 58-63.
D. G. Fredlund and J. Krahn 1977. Comparison of slope stability methods of analysis. Canadian Geotechnical journal. Vol. 14. pp. 429-439.
D.V. Griffiths, and G.A. Fenton, (2004), Probabilistic slope stability analysis by finite elements Journal of Geotechnical and Geo environmental Engineering, No.130, pp: 507- 518.
El-Ramly, H., Morgenstern, N.R., Cruden, D.M. 2002. Probabilistic Slope Stability Analysis for Practise. Canadian Geotechnical Journal. Vol. 39. pp. 665-683.
GEO-SLOPE. Slope/W for slope stability analysis. Version 5. Calgary, Alberta: GEOSLOPE International Limited; 2002.
J. Ching, K.K. Phoon, and Y.G. Hu (2010), Observations on Limit Equilibrium–Based Slope Reliability Problems with Inclined Weak Seams, Journal of Engineering Mechanics, No.10, 136, pp:1220-1233.
Santamarina, L.C., Altschaeffl, A.G. and Chameau, J.L.,1992. “Reliability of Slopes: Incorporating Qualitative Information.” Transportation Research Board, TRR 1343.
SLIDE for slope stability analysis. Toronto, Ontario: Rocscience Inc.
Spencer, E. 1967. A method of analysis of the stability of embankments assuming parallel inter-slice forces. Geotechnique, 17, pp. 11-26.
USACE, United States Army Corps of Engineers, (2003). Slope Stability, Engineering Manual 1110-2-1902, Department of the Army, Corps of Engineers, Washington, D. C.
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Published
2016-06-22
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Civil Engineering,Structures, Construction, Geo technology, Water, Transportation
