地下工程渗流排水孔数值模拟的隐式复合单元法

根据渗流基本原理，提出了排水孔在地下工程中渗流数值模拟的隐式复合单元法。将排水孔隐含于模型网格中，得到排水孔在模型中的数据信息。判断所有排水孔与单元的相对位置，通过修正排水孔所穿过单元的渗透传导矩阵来模拟排水孔的强排水效果，并通过实例对排水子结构法和隐式复合单元法进行了比较。运用编制的三维有限元计算程序对某地下水电站厂房渗流场及排水孔进行了模拟，结果表明，采用隐式复合单元法对排水孔进行模拟是可行的。

Study on numerical simulation of drainage hole of seepage field in underground engineering with implicit composite element method

A numerical simulation method of drainage hole in three-dimensional seepage field in underground engineering is presented according to the theory of seepage flow. Drainage holes are implicit in model and their data are gained according to pre-process. The relative positions of drainage holes are judged and their impacts are simulated through modifying the penetrability conduction matrixes of elements perforated by the drainage holes. And then drainage substructure method and implicit composite element method are compared via an example. Finally, a three-dimensional finite element method calculation program compiled by ourselves is used to simulate the seepage field of an underground hydropower house. The calculation result shows that the new method introduced is feasible to simulate drainage holes.