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采用改进节点虚流量法求解无压稳定渗流场,并引入无厚度的裂缝模型对破坏的垂直缝渗流行为进行模拟,得到面板堆石坝裂缝渗流问题的有限元分析方法,并编制Fortran程序。以某混凝土面板堆石坝为例,计算了面板单一垂直缝破坏和多条垂直缝破坏条件下的三维渗流场,得到不同条件下渗流场的水头分布、浸润线以及渗漏量,系统分析了面板堆石坝在垂直缝破坏条件下的稳定渗流场规律和特点。结果表明,该方法能对渗流逸出点和浸润线进行准确定位,还能很好地模拟面板垂直缝破坏对坝区渗流场的影响,可以为面板堆石坝的接缝设计提供参考。
The improved nodal flow method is used to solve the seepage pressure field with no pressure and the thickness of fractures is introduced to simulate the seepage behavior of vertical fractures. The finite element method of fracturing seepage of face rockfill dam is obtained and Fortran program is prepared. Taking a concrete faced rockfill dam as an example, the three-dimensional seepage field of a single vertical joint failure and multiple vertical joints is calculated, and the head distribution, infiltration line and seepage of the seepage field under different conditions are obtained. Laws and characteristics of steady seepage field of concrete facing rockfill dam under vertical seam damage. The results show that the method can accurately locate the seepage point and the infiltration line, and can well simulate the influence of the vertical seam failure on the seepage field in the dam area, which can provide reference for the joint design of concrete faced rockfill dam.