RELIABILITY ANALYSIS METHOD OF SLOPE STABILITY
Hang Yu · Coastal Engineering · 2001
The reliability analysis of slope sliding stability is based on the probability of having the soil resistance greater than the soil sliding force. A united ultimate state equation is introduced for making the slope stability reliability analysis in this paper. The soil parameters, including unit weight γ , internal friction angle φ and coherence c are regarded as radom variables, and their equivalents are normalized when these parameters are not normally distributed. By taking the correlation between these variables into account, the simplified correlation method is used for making the statistical analysis of random variables, and Bishop method is taken as an example to use JC method to derive the reliability indexes of slope stability and the failure probability, and to give the algorithmic procedures for computing the safety factor and the reliability index. The factors to influence the reliability index, such as the shear strength of soil, the distribution type of random variable and the variabilities of soil parameter are also discussed.