该文根据以沟代井列法、改进排水子结构法、以缝代井列法以及结点水位约束法等4种常用的模拟排水孔工作的基本原理和方法，以一工程作为实例，开展坝址渗流场数值模拟，并进行对比分析。结果表明，改进排水子结构法能够很精细地刻画排水孔（幕）周围渗流性态，而其它3种方法的精度相对差一些。就模拟过程来讲，前一种方法相对比较复杂，后3种方法则相对简单。%In this paper ,according to the basic working principles and methods of four common simula-tions drainage hole ,such as the method of an array of well replaced by a drainage ditch , the method of improved drainage substructure , the method of an array of well replaced by fissure and the method of node level constraint , taking a project for an example , the numerical simulation of seepage field is con-ducted and analysed comparatively .The results show that , the method of improved drainage substructure can finely portray the seepage state around the drainage-holes (curtain), while the accuracy of the other three methods is relatively poor .Just in terms of the simulation process , using the former method seems complex ,but three methods behind are relatively simple .
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