苏阿皮蒂重力坝深层抗滑稳定分析研究

针对重力坝坝基存在缓倾角软弱夹层的深层抗滑稳定问题,利用刚体极限平衡法分析软弱夹层的埋深、位置及倾角对深层抗滑稳定安全系数之间的影响规律。以苏阿皮蒂水利枢纽为例,根据《混凝土重力坝设计规范》,采用"等安全系数法"进行深层抗滑稳定计算,并提出在坝址处设置混凝土深齿槽,切断软弱夹层,以提高坝基的深层抗滑稳定性。结果表明,坝基经加固后的抗滑稳定安全系数满足规范要求。

Study on Deep Anti-sliding Stability Analysis of Souapiti Gravity Dam

In view of the problem of deep anti-sliding stability of the gravity dam foundation with weak interlayer,the influences of buried depth,location and inclination of the weak interlayer on the safety factor of deep anti-sliding stability of dam are analyzed by rigid body limit equilibrium method.Taking Souapiti Hydro Project as an example,the deep anti-sliding stability of Souapiti Gravity Dam is calculated by the“Equal safety factor”method based on the Code for Design of Concrete Gravity Dams,and it is proposed to set the deep concrete keys at dam site to cut the weak interlayer and improve the deep anti-sliding stability of dam foundation.The results show that the safety factor of anti-sliding stability of dam foundation after reinforcement can meet the requirements of the Code.