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本文首先介绍服从达西定律的混凝土坝坝基渗流的数学模型,其次简述当前研究该类问题的主要方法——导电液模拟试验和有限元数值计算,最后结合龙羊峡混凝土坝进行试验和计算。在有限元数值计算中,提出用排水沟代替排水幕的方法和坝基渗流的电算程序。研究结果表明,两种方法各有所长,都能满足工程精度要求,为优选渗流控制方案提供依据。
In this paper, we first introduce the mathematical model of the seepage flow of concrete dams subject to Darcy’s law, followed by a brief description of the current research methods of such problems - conductive fluid simulation test and finite element numerical calculation, finally with the test and calculation of Longyangxia Concrete Dam . In the numerical calculation of finite element, the method of replacing drainage curtain with drainage ditch and the calculation program of dam foundation seepage are proposed. The results show that the two methods have their own strengths, which can meet the requirements of engineering accuracy and provide the basis for optimizing seepage control scheme.