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采用非线性强度指标按简化毕肖普法给出的抗力弯矩和滑动弯矩定义坝坡稳定可靠度分析的功能函数,并应用一次二阶矩法计算可靠指标,提出了一种混凝土面板堆石坝坝坡稳定可靠度计算方法,以某面板坝坝坡为例进行了稳定可靠度分析。结果表明,各工况上、下游坝坡及深层滑动的最小安全系数均满足《碾压式土石坝设计规范》的要求,最小可靠指标除地震工况下游坝坡外都满足《水利水电工程结构可靠度设计统一标准》的要求;安全系数和可靠度计算结果的总体规律一致,但在某些情况下有较大差异。对于重要工程,建议同时进行安全系数和可靠度分析。
The function function of stability analysis of slope stability is defined by the nonlinear strength index according to the simplified Bishop method and the second moment method to calculate the reliability index. A concrete facing rockfill dam Stability calculation method of dam slope stability analysis is carried out by taking a dam dam slope as an example. The results show that the minimum safety factor of downstream slope and deep sliding meet the requirements of “Design Code of Roller Compacted Embankment Dam” in each condition, and the minimum reliable index satisfies the requirements of “Water Resources and Hydropower Engineering Structure Reliability design uniform standards ”requirements; safety factor and reliability of the overall law of the same, but in some cases are quite different. For important projects, it is recommended to carry out safety factor and reliability analysis at the same time.