改进排水子结构法求解地下厂房洞室群区的复杂渗流场

^^On solution of complicated seepage field in surrounding rock mass of underground power station openings

本文论述了用改进排水子结构法精细地求解地下厂房区复杂渗流场的方法，突出地介绍了对厂房、排水廊道及排水孔等孔洞内边界上渗流状态的数学模拟方法最后以大朝山水电站工程为例对渗流场进行了求解．

Based on the numerical method of nodal virtual seepage flux which can solve free surface seepage now problem with a fixed mesh, the authors present the improved drainage substructure technique in this paper, The technique is suitable to emulate the seepage behaviour of relief holes intersecting or not intersecting the free surface and to solve the complicated seepage field in surrounding rock mass of underground power station openings. The analysis of the complicated seepage field in the area of the openings and structures of the underground power station of Dachaoshan is illustrated.