复杂渗流问题中层状结构的隐式表达方法

Study on Implicit Expression of Stratiform Structure in Complex Seepage Problem

提出了基于渗流有限元方法的层状结构(如断层、帷幕及岩层等)隐式表达方法,该方法不依赖于建立实体有限元网格,仅采用空间几何的方法在计算程序中实现对某些部位渗透性的修改。该方法降低了复杂结构渗流分析问题中建立有限元建模的难度,有利于对层状结构的厚度或空间位置进行修改。通过数值计算对比分析,验证了该方法的正确性和计算精度的可靠性。

Based on the seepage finite element method, an implicit expression of stratiform structure, such as fault, grouting curtain and strata, in complex seepage problem is proposed. The method uses space geometry to modify the hydraulic conductivity of stratiform structure in seepage analysis without building concrete structure in the mesh. As a result, the difficulty and time of modeling is reduced in seepage problem with complex structure, meanwhile, the thickness and space location of the stratiform structure are easily modified. The theoretic strictness and computational accuracy are verified by the numerical analysis.