Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2005.10a
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- Pages.649-654
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- 2005
Reliability-Based Analysis of Slope Stability Due to Infiltration
침투에 대한 불포화 사면의 신뢰성 해석
- Cho, Sung-Eun (Dam Safety Research Center, Korea Institute of Water and Environment) ;
- Lee, Jong-Wook (Dam Safety Research Center, Korea Institute of Water and Environment) ;
- Kim, Ki-Young (Dam Safety Research Center, Korea Institute of Water and Environment) ;
- Jeon, Je-Sung (Dam Safety Research Center, Korea Institute of Water and Environment)
- Published : 2005.10.07
Abstract
Shallow slope failures in residual soil during periods of prolonged infiltration are common over the world. One of the key factors that dominate slope stability is hydrological response associated with infiltration. Hence, the soil-water profile during rainfall infiltration into unsaturated soil must me examined to evaluate slope stability. However, the hydraulic response of unsaturated soil is complicated by inherent uncertainties of the soil hydraulic properties. This study presents a methodology for assessing the effects of parameter uncertainty of hydraulic properties on the response of a analytical infiltration model using first-order reliability method. The unsaturated soil properties are considered as uncertain variables with means, standard deviations, and marginal probability distributions. Sensitivities of the probabilistic outcome to the basic uncertainties in the input random variables are provided through importance factors.