小湾高拱坝坝基浅层松弛区超载屈服研究  

Overloading and yielding study of loosened shallow foundation at Xiaowan Arch Dam

作　　者：吴数伟[1] 张建海[1] 张雪晶[1] 

机构地区：[1]四川大学水利水电学院,四川成都610065

出　　处：《水利水电科技进展》2008年第4期20-22,64,共4页Advances in Science and Technology of Water Resources

摘　　要：通过对小湾高拱坝坝基浅层松弛区的弹塑性分析，采用数值计算方法，揭示超载过程中坝基屈服发展规律，并采用坝基整体超载安全系数等方法评价大坝局部安全性、整体安全性以及两者之间的关系。通过分析认为小湾坝基浅层松弛区发生屈服尚属于局部问题，坝基整体超载安全度仍可达3—3．5。The development of a yielding area in the loosened shallow foundation at Xiaowan Arch Dam is discussed using an elasto-plastic model. The hydro-pressure overloading method is applied to the evaluation of integral stability of the entire structure and the stability of the dam foundation. The analysis of failure of the dam foundation shows that the local stability storage factor of the foundation is small but the integral stability factor of the entire structure could reach 3-3.5. Hence, the occurrence of a fielding area in the loosened shallow foundation of the dam is a limited, local problem.

关 键 词：坝基 浅层松弛层 坝基屈服 大坝超载 整体稳定性 高拱坝 小湾水电站 

分 类 号：TV642.4[水利工程—水利水电工程]