Abstract

The effects of uncertainty due to the variability of soil properties, pore pressure, and earthquake forces on the stability of a deposit slope in the hydropower reservoir are investigated. The spatial variability of soil properties is incorporated in the probabilistic slope stability analysis by a random field model, and a sensitivity analysis is conducted considering spatial variability of soil properties. Cutting the slope can reduce the risk of slope failure, which has been corroborated by the probabilistic slope stability analysis. The sensitivity analysis shows that additional measures such as drainage and toe protection can help stabilize the slope before reservoir filling.

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