复杂地基重力坝深层抗滑模拟研究

重力坝抗滑稳定性关系到水库地整体安全,极为重要。本文采用离散元法对含层理、节理等复杂结构面的坝基抗滑稳定性进行了数值模拟研究,计算了不同地质条件下水库无蓄水、水库蓄满两种工况的坝体稳定性。研究表明:水库在无蓄水时,坝体稳定性都比较好,但当水库蓄满后,坝体稳定性受地质环境影响显著,多滑动面形式比双滑动面形式更有利益坝体稳定,并且与重力坝的重心位置有关。本文提出的方法与计算结果,可供复杂地质条件下重力坝设计参考。

Simulation of deep anti-sliding of gravity dam on complex foundation

The anti-sliding stability of gravity dam is always related to the overall safety of reservoir, and is very important. The paper adopted discrete element method to simulate the stability of dam base of complex structure surface that included bedding and joints. It also calculated the stability of dam body under two conditions of empty and full reservoir in different geological conditions. Study shows that the stability of dam is good when the reservoir is empty, while the reservoir is full of water, the stability of dam is affect significantly by the geological condition. Multiple sliding surface form are more better than double sliding surface form for the stability of dam. The stability is related to the position of the gravity dam centre. The results can be used for the design of gravity dam under complex geological condition.