高土石坝坝坡稳定安全系数取值标准研究  

Research on Slope Stability Safety Factor of High Embankment Dam

作　　者：李斌[1,2,3] 杜效鹄 

机构地区：[1]中交天津港湾工程研究院,天津300222 [2]港口岩土工程技术交通行业重点实验室,天津300222 [3]天津市港口岩土工程技术重点实验室,天津300222 [4]水电水利规划设计总院,北京100120

出　　处：《水力发电》2016年第1期37-39,61,共4页Water Power

基　　金：国家重点基础研究计划(973计划)(2013CB036403)

摘　　要：高度在200 m以上的土石坝设计一直沿用低于200 m土石坝的设计规范,超高土石坝设计规范亟需完善。基于相对安全率理论,取超过200 m高土石坝坝坡稳定允许可靠指标4.2为设计标准,计算传统方法相对安全率和可靠度方法相对安全率,并对二者进行线性回归,结果显示超过200 m高土石坝坝坡稳定安全系数正常工况取值1.6与允许可靠指标为4.2处于同一风险控制水平,并通过工程实例对此取值的合理性进行了验证。The design of high embankment dams with a height of above 200 m in China currently use the design specifications which only apply to the construction of earth dam with a height of less than 200 m, so the design specification for super high embankment dams need to be improved. Based on the theory relative safety ratio and taking the allowed reliability index of 4.2 as the design standard of high embankment darn with height of over 200 m, the relative safety ratios of traditional method and reliability method are calculated respectively. The calculation values are analyzed by linear regression. The result shows the safety factor of 1.6 and allowable reliability index of 4.2 for the slope of high embankment dam with height of over 200 m is on same risk level under normal operation conditions. The case study proves the rationality of safety factor of 1.6.

关 键 词：高土石坝 坝坡稳定 相对安全率 允许可靠指标 安全系数 

分 类 号：TV641.1[水利工程—水利水电工程]