江口拱坝坝基渗流场有限元法分析

运用固定网格结点虚流量法及排水子结构技术，对江口拱坝坝基的防渗与排水渗控制施、两岸山体边界条件、隔水岩层阻渗及岩体成层产状等因素在影响坝基渗流场特性中的具体作用进行了计算分析。结果表明，排水子结构技术在精细求解复杂坝基渗流场中具有明显的优势，它在理论和算法上严密，完全能仿真模拟各个排水孔的几何尺寸及排水降压的真实水力行为，不仅能明显地提高计算效率，还能使渗流场的精度大大提高。

Finite element analysis on seepage field in the dam foundation of Jiangkou Arch Dam

The fixed mesh point dummy discharge method and the drainage sub structure technique were used to calculate and analyze the effect on seepage field characteristics of dam foundation by the factors such as the seepage control and drainage seepage control measures for the dam foundation of Jiangkou Arch Dam, the boundary conditions of the mountainous bodies in two banks, the seepage blocked by the impervious rock layers and the stratified rock formation factors. The results showed that the drainage sub structure technique has obvious advantage over other methods in solving the seepage field in complex dam foundation in detail. This technique is strict in theory and calculation and can completely simulate the dimensions of various drainage holes and the actual hydraulic behaviors of drainage. It can not only enhance obviously calculation efficiency but also increase the solution accuracy of seepage field.