中文摘要：

基于有限元原理,采用ANSYS软件中的热处理模块,建立了坝体数值分析模型,针对湖南省长沙县五龙山土石坝的渗流过程进行了数值模拟,得到了在三种工况下坝体加固前后的渗流速度、渗流量、渗透坡降、逸出点高程、渗透比降等特征值,通过比较可知：在正常蓄水位、设计水位及校核洪水位条件下,采用粘土防渗墙进行坝体的加固,其渗流速度、单宽渗流量、逸出点高程以及逸出点渗透比降均小于坝体加固前计算相应值,平均渗透坡降高于加固前计算相应值。计算结果表明采用粘土防渗处理方法进行坝体加固,对保证土石坝的渗流稳定和坝体安全具有重要的工程实践意义。

英文摘要：

Based on the finite element theory, considering the heat module ofANSYS, a numerical analysis model of the dam has been established, a percolation process of earth-rock dam in Changsha county Hunan province was simulated. By analyzing the velocity, flow, gradient, elevation and slope ratio of the seepage in three different conditions, it can be found that the flow, velocity, elevation, and slope ratio of the seepage become lower than the former date while the gradient become higher than owing to the dam reinforcement. The calculation results show that it has an important engineering practical significance to ensure the safety of the dam and the stability of seepage by using the clay treatment of seepage for reinforcement.