Abstract: In design of homogeneous earth dam, sudden drawdown of water level is always a control condition for stability of upstream slope. Taking a homogeneous earth dam in Tianjin as an example, this paper analysed its seepage by finite element method and the stability of dam slope when sudden drawdown of water level. By analysis on the influence of different drawdown speed to slope stability, the change law of stability coefficient was gotten.

摘要： 在均质土坝设计中，水位骤降通常是上游边坡稳定计算时需控制的工况。本文以天津某均质土坝为例，利用有限元对坝坡进行渗流分析，分析库水位骤降对渗流场的影响，研究库水位骤降时土坝坝坡的稳定情况。通过对不同库水下降速率的坝坡稳定分析，得到坝坡稳定系数随库水位骤降速率的变化规律。