水利学报2017，Vol.48Issue(12)：1499-1505,7.DOI:10.13243/j.cnki.slxb.20170789
考虑地震与溃坝洪水共同作用的土石坝坝坡稳定分析方法
Analysis method for the slope stability of earth-rock fill dam considering the effect of concurrent earthquake and dam-break flood
摘要
Abstract
Earthquake and flood are the major factors which affect the slope stability of earth-rock fill dam in cascade reservoirs,and the effect of dam-break flood from upstream is especially remarkable.Analysis method was put forward for the earth-rock fill dam slope stability considering the effect of concurrent earthquake and dam-break flood.The method is based on the Bishop method,considering the variation coefficient of dam material,and the effect of dam-break flood is modeled by the fluctuation of dam front water level.Taking "Busigou-Shuangjiangkou" two ascades as an example,the dam slope stability and the risk of the downstream cascade dam slope of "Shuangjiangkou" were analyzed.The results show that,under the extreme condition of dam-break flood from upstream and earthquake,the downstream dam slope failure probability is 1.571x10-6,and the corresponding reliability index is 4.667.The stability meets the standard requirements for the second class destruction of the first-grade structure.关键词
梯级水库/溃坝洪水/地震/坝坡稳定分析/可靠度指标Key words
cascade reservoirs/dam-break flood/earthquake/dam slope stability analysis/reliability index分类
建筑与水利引用本文复制引用
陈玺,孙平,李守义,冯上鑫,黎康平..考虑地震与溃坝洪水共同作用的土石坝坝坡稳定分析方法[J].水利学报,2017,48(12):1499-1505,7.基金项目
国家重点研发计划课题(2016YFC0401804) （2016YFC0401804）
国家自然科学基金项目(51709282) （51709282）
国家重点基础研究发展计划(973计划)(2013CB036403) （973计划）
