【摘 要】
：
针对堤基管涌侵蚀破坏过程的复杂渗流场模拟问题,采用无单元Galerkin法数值模拟研究管涌动态发展过程及机理,介绍了管涌区域破坏的判别方法、管涌尖端附近节点加密方法等,并
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针对堤基管涌侵蚀破坏过程的复杂渗流场模拟问题,采用无单元Galerkin法数值模拟研究管涌动态发展过程及机理,介绍了管涌区域破坏的判别方法、管涌尖端附近节点加密方法等,并结合砂槽模型试验和有限元模拟结果对无单元法的计算结果进行了验证与分析。结果表明,采用无单元法计算得到的管涌渗流场和有限元计算结果基本吻合,且管涌发展过程和模型试验结论较为一致;获得了管涌侵蚀破坏过程中管涌通道尖端水平渗透比降的变化规律,弥补了砂槽模型试验的不足。
In view of the complicated seepage field simulation of embankment pipe erosion and failure process, the unit-free Galerkin method is used to study the dynamic development process and mechanism of pipe flooding. The method of identifying the piping damage, the method of node encryption near the pipe tip, The results of model test and finite element simulation verify and analyze the calculation results of elementless method. The results show that the calculated seepage field and the finite element method calculated by the unitless method are in good agreement with each other, and the development process of the tube surge is in good agreement with the model test. The variation law of the horizontal infiltration ratio at the piping passage tip during tube erosion erode is obtained, Make up for lack of sand tank model test.
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