复杂地基上高土石坝坝体稳定可靠度分析

以可靠度理论为基础，对复杂地基上兴建的高土石坝的坝体稳定性及坝体－地基稳定性进行了分析研究。使用Ｊａｃｏｂｉ正交变换法将要关的随机变量转变为相互独立的随机变量，采用Ｍｏｎｔｅ－Ｃａｒｌｏ方法计算可靠度以冶水库堆石坝为例，使用定值方法和可靠度方法对土石坝稳定性进行了分析计算。结果表明，在相同的条件下，定值法计算得到的稳定临界滑面不唯一，且各临界滑面的失效概率不一致。定值法中使用的安全系数与其滑面稳定

Stability Reliability of Earth and Rock Filled High Dams on Complex Foundations

The stability of earth and rock filled high dams on complex foundations is studied based on reliability theory. Jacobi transfer method is used to transform the correlated variables into independent ones, and Monte Carlo method is then employed to calculate the reliability. The rock filled dam of Yele reservoir is taken as an example. It is shown that, in the same situation, the method presented in this paper can obtain the consistent stable critical slip planes and safety levels, while the conventional methods with fixed parameters can not although they can usually obtain the same stability with that obtained by the new method.