闸坝地基岩土体各向异性渗流边界条件的影响分析

Influence Analysis of Seepage Boundary Conditions of Anisotropy in Rock-soil Body of Gate Dam Foundation

渗流运动数值模拟计算结果的精度与边界条件的处理关系密切,在各向异性渗流情况下分析了边界条件选取对计算结果的影响程度,将水利工程中各向异性渗流常见的边界情况概化为四类数学模型并进行了数值模拟计算。结果表明,边界附近区域的水头分布受边界条件的影响最为明显,呈很强的非线性,边界条件的不同也会影响各向异性区域内部流速分布和渗流量。

The processing of boundary condition has a significant impact on the accuracy of calculation resnh in seep age flow simulation. In the case of general anisotropic seepage flow, this paper analyzes the dependency of the simulated results on the processing of boundary condition. The common boundary conditions in water conservancy project are gener alized four kinds of conception models. The sinmlated results indicate that the different boundary conditions has a obvious influence on the hydraulic head distribution in the region characteristics of hydraulic head distribution; meanwhile, and seepage discharge in anisotropic seepage flow. adjacent to the boundary, and presents the strong non linear boundary conditions can also affect the flow field distribution