齿墙结构对重力坝深层抗滑稳定安全性能的影响

Influence of Key-wall Structure on Safety Performance of Gravity Dam Against Deep Sliding

为分析齿墙结构对重力坝深层抗滑稳定安全性能的影响,以乌河水库软弱夹层为例,应用ANSYS软件,采用有限元强度折减法和最大剪切强度允许相对位移失稳判据分析了齿墙宽度、坡度以及位置对重力坝深层抗滑稳定性安全系数的影响。结果表明,齿墙坡度对重力坝深层抗滑稳定安全性能的影响小于齿墙宽度;相同条件下在坝趾处设置同等规模的齿墙可更好地发挥抗滑作用,为齿墙的优化设计及重力坝除险加固提供了参考。

In order to analyze the impact of key-wall structure on the anti-sliding stability safety performance of gravity dam,weak intercalated layer of Wuhe Reservoir was analyzed by ANSYS.The strength reduction FEM and the maximum shear strength allowable relative displacement instability criterion were used to analyze the influence of the key-wall width,slope and position on the deep anti-sliding stability coefficient of gravity dam.The results show that the impact of key-wall slope is less than the key-wall width.Under the same conditions,the key-wall could play a better role in setting anti-slide at the dam toe.This paper provides a reference for design and optimization of gravity dam and key-wall reinforcement.