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通过对三峡大坝左＃９～右＃２１坝段基础渗流场的有限元数值模拟，对比分析了排水孔幕的孔距、建基面的高程以及封闭和不封闭防渗排水的型式对渗流控制效果的影响，并采用接近实际的设计排水孔距，用三维模型模拟分析了防渗排水系统的渗控效果。研究结果表明，虽然渗透剖面图显示坝基岩体的渗透性很小，但帷幕结合排水孔的防渗排水措施仍是必要的，此设计方案具有较好的渗控效果。
Through the finite element numerical simulation of the seepage field of the left dam # 9 ~ right dam # 21 of the Three Gorges Dam, the pore-to-pore distances of the drainage hole curtains, the elevation of the built-up surface and the types of seepage-proof drainage with closed and non- Control effect of the effect, and the actual design of drainage holes close to the actual use of three-dimensional model simulation analysis of seepage drainage system seepage control effect. The results show that although the permeability profile shows that the permeability of the dam foundation rock is very small, the seepage prevention and drainage measures of the curtain combined with the drainage holes are still necessary. This design scheme has good seepage control effect.