地下厂房防渗排水系统渗流特性的有限元分析  

Finite element analysis of seepage property of anti-seepage and drainage system of underground powerhouses

作　　者：岑威钧[1] 朱岳明[1] 林宝尧[2] 范祥伦[2] 

机构地区：[1]河海大学水利水电工程学院,江苏南京210098 [2]成都勘测设计研究院,四川成都610072

出　　处：《河海大学学报（自然科学版）》2007年第3期267-270,共4页Journal of Hohai University(Natural Sciences)

摘　　要：在求解无压渗流场结点虚流量法的基础上,结合可精细模拟密集排水孔复杂渗流水力行为的改进排水子结构技术,对某地下厂房厂区洞室群围岩区三维渗流场进行了有限元求解分析,着重研究了防渗排水系统中的帷幕和排水幕的渗流特性.研究表明,排水幕在排水通畅的前提下具有强大的排水能力,其排水孔间距在一定范围内变化对渗流场水头分布影响不明显.因此,可适当加大排水孔间距,以减少工程投资.The finite element analysis of 3D seepage field for surrounding rock mass of cavern groups of underground powerhouses was performed based on the nodal virtual flux method for solving the non-pressure seepage field and the improved drainage substructure technique for accurately simulating the complex seepage behaviors of densely distributed drainage holes, with emphasis placed on the seepage properties of the anti-seepage concrete curtain and drainage curtain in the anti-seepage and drainage system. The result shows that the drainage curtain is of high drainability under smooth drainage condition, and that the variation of the spacing between drainage holes within a certain range is of little influence on the water head distribution of the seepage field. Therefore, the spacing between drainage holes could be increased properly, so that the investment in the project could be reduced.

关 键 词：地下厂房 渗流场 排水孔 渗流水力行为 排水子结构 

分 类 号：TV223.4[水利工程—水工结构工程]