均质坝排水失效坝体自由面变化及坝坡稳定分析  

Analysis of dam free surface change and slope stability for drainage-failure homogeneous dam

作　　者：刘钊[1] 陈兴周[1,2] 冯璐[1] 

机构地区：[1]西安理工大学,西安710048 [2]中国水电顾问集团西北勘测设计研究院,西安710065

出　　处：《西北水电》2011年第6期72-74,84,共4页Northwest Hydropower

摘　　要：为了研究均质坝下游排水褥垫失效情况下坝体自由面变化及其对下游坝坡稳定性的影响,通过有限元法对计算区域渗流场进行分析,得出的自由面和孔隙水压力等结果应用于下游坝坡的稳定性分析。实例分析结果表明:均质坝渗流场的分布由其下游排水条件决定;排水褥垫失效,坝体渗流自由面上升,饱和区范围增大,下游坝坡安全系数降低。The seepage field in calculation zone is analyzed by finite element method to study the dam free surface change and its influence on the stability of the downstream dam slope in case of downstream drainage mattress failure. The obtained results of free surface and pore water pressure are applied on the stability analysis of downstream dam slope by the method of limit equilibrium. The results show that the distribution of seepage field of homogeneous dam depends on the downstream drainage conditions, if the drainage mattress failures, the seepage free surface of dam rises, the scope of saturation area increases and the safety coefficient of downstream dam slope decreases.

关 键 词：均质坝 排水失效 渗流场 坝坡稳定性 极限平衡法 

分 类 号：TV641[水利工程—水利水电工程]