深埋地下管道及地下洞室群三维渗流场的 有限元精细模拟

利用自主研发的三维渗流分析软件GWSS计算了敦化抽水蓄能水电站工程区的渗流场分布特征及地下厂房系统、引水管道排水系统的排水效果。计算结果表明：（1）在现有设计方案下，地下厂房和压力管道中水平段的排水系统和排水洞作用明显，防渗排水设计满足设计要求；（2）下水平段的压力管道承受外水压力较大，建议对引水系统的下水平段的排水洞增设排水孔。

Precise finite element simulation on 3-D seepage field of deep-embedded underground pipelines and underground cavern group

The distribution feature of the seepage field and the drainage effects of both the system of the underground powerhouse and the water diversion system within the construction site of Dunhua Pumped Storage Hydropower Station are calculated with the independently developed 3-D seepage analysis software——GWSS.The calculation result shows that 1.the drainage system and drain holes of the underground powerhouse and the middle horizontal section of the penstock have obvious effects under the existing design scheme and satisfy the relevant design requirements as well; 2.The external water pressure on the lower horizontal section of the penstock is larger，thus more drain holes are suggested to be arranged therein.