基于初流量法的子结构技术在渗流分析中的应用

水利水电工程中地下厂房或洞室往往采用密集排水孔的排水措施,以确保其长期稳定和安全运行.对其作渗流计算时,由于渗流自由面的求解是一个非线性问题,而密集排水孔的模拟条件较为复杂,这两个问题往往交织在一起,计算难度很大.本文在引入连续调整系数对初流量法进行改进的基础上,采用子结构技术,并将子结构作为整体网格结构的一部分进行处理,统筹兼顾整体和局部（密集排水孔）渗流场,较好的解决了上述问题.并将该方法应用于泵站地下主厂房的渗流场分析中,取得较好的效果.

Modified initial flow method and sub-structure technique application in seepage analysis

To optimize excavation with concentrated drain holes, the seepage problem with free surface and concentrated drain holes is very difficult to solve. The initial flow method can solve the problem with the free surface. In this paper, an improved method is proposed. The initial flow method is improved by intro- ducing continuous adjustment coefficient. Based on this, the sub-structure technique is adopted to solve con- centrated drain hole simulation problem. Finally, a seepage simulation with concentrated drain holes is con- ducted, and the result is satisfactory.