基于土石坝非线性抗剪强度指标的坝坡失稳风险分析  

Slope Instability Risk Analysis of Earth-rock Dams Based on Nonlinear Shear Strength Indices

作　　者：闫滨[1] 钱静宇[1] 赵波[1] 

机构地区：[1]沈阳农业大学水利学院,沈阳110161

出　　处：《沈阳农业大学学报》2012年第3期351-356,共6页Journal of Shenyang Agricultural University

摘　　要：为准确合理地分析土石坝坝坡失稳风险,综合考虑抗剪强度指标的不确定性和非线性,进行坝坡失稳风险计算。并将基于土石坝非线性抗剪强度指标的坝坡失稳风险分析应用在柴河水库大坝风险计算中,求得柴河水库大坝坝坡失稳风险度为0.976×10-4,表明柴河水库大坝坝坡稳定性居于允许阈值区间,但略偏向于不可容许风险,建议多加关注柴河水库大坝坝坡稳定状况。In order to analyze the instability risk of earth-rock dam slopes accurately and reasonably,the uncertainty and nonlinearity of shear strength indices were considered together to calculate the risk of slope instability.Then,slope instability risk analysis based on nonlinear shear strength indices was applied to Chaihe Reservoir dam.The results showed that the slope instability risk degree of Chaihe reservoir dam was 0.976×10-4,which illustrated that the slope stability of Chaihe Reservoir dam is in the permitted threshold interval,but tends to unallowed risk slightly.Thus,it is suggested that more attention should be payed on the slope stability of Chaihe Reservoir dam.

关 键 词：坝坡失稳 风险分析 土石坝 非线性 抗剪强度 

分 类 号：TV698.23[水利工程—水利水电工程]