含陡坡建基面重力坝坝基破坏模式及稳定性研究

采用三维非线性有限元法 ,对百色RCC重力坝 3B坝段进行破坏模式及稳定性的研究 ,确定出含陡坡建基面 3B坝段在超载法和综合法下的破坏模式及稳定安全系数。同时将其安全系数与百色重力坝其它坝段同种工况下的安全系数作比较分析。结果表明 :由于 3B坝段部分建基面处于侧向陡坡上 ,陡坡段正压作用减小 ,3B坝段的稳定安全系数满足工程要求 ,但较其它坝段略小

Research on breaking mode and stability of gravity dam base on a datum plane with steep slope

By three-dimensional nonlinear finite element method, the breaking mode and stability of 3B dam block of Baise RCC gravity dam is studied, and the breaking mode and stability safety factor of the 3B dam block on a datum plane with steep slope are figured out corresponding to overload method and synthetic method respectively. Comparison and analysis is also conducted between the safety factor of 3B dam block and that of other dam blocks of Baise gravity dam under the same operating condition. The results demonstrate that the positive pressure from steep slope reduces due to partial datum plane of 3B dam block falls on the side steep slope, and the stability safety factor of 3B dam block satisfy engineering requirement although it is lower than that of other dam blocks.