论文部分内容阅读
针对某混凝土重力坝坝基存在3层粘土软弱夹层可能引起坝基深层滑动问题,提出了有限元超载—折减综合法,利用ANSYS有限元分析软件构建了该坝溢流坝段深层抗滑稳定分析模型,通过关键点水平位移的变化判断坝基深层滑动失稳情况,进而求得坝基抗滑稳定安全系数介于3.00~3.25之间。与刚体极限平衡双斜面法及强度折减法、超载法相比,有限元超载—折减综合法所得抗滑稳定安全系数接近于前三者的平均值(3.02~3.32),评价结果更偏于安全。
Aiming at the existence of three layers of weak clayey clay in the foundation of a concrete gravity dam, deep sliding of the dam foundation may be caused, and a finite element overloading-reduction synthesis method is proposed. ANSYS finite element analysis software is used to construct a deep anti-sliding stability analysis model , The deep slide instability of the dam foundation is judged by the change of the horizontal displacement of the key points, and the safety factor of anti-slide stability of the dam foundation is found to be between 3.00 and 3.25. Compared with rigid-body limit equilibrium double-slope method and strength reduction method and overload method, the safety factor of anti-slide stability obtained by the finite element overloading-reduction method is close to the average of the first three (3.02 ~ 3.32) .