深圳抽水蓄能电站厂房洞室群优选渗控方案分析

利用求解有自由面渗流场改进的节点虚流量全域迭代法，结合精确的排水孔模拟技术，对深圳抽水蓄能电站运行期地下引水管线区及厂房洞室群围岩区三维渗流场进行了有限元仿真分析，着重研究了优选方案中高压岔管开裂时引水支管区域防渗排水系统的渗流特性．研究表明，该区域设置封闭性防渗帷幕加排水孔幕组合防渗体系，能有效控制高压引水管开裂时的高压渗水，改善该区岩体渗透比降分布，保证了下游厂房运行期的安全．

Research on Seep Age Characteristic of Underground Cavern Group of Shenzhen Pumped Storage Power Station

The finite element analysis of 3D seepage field for surrounding rock mass of power penstocks and cavern group of Shenzhen Pumped Storage Power Station was performed based on improved procedure of nodal virtual flux of global iteration to solve seepage free surface and the improved drainage holes technique for accurately simulating the complex seepage behaviors of densely distributed drainage holes, with emphasis placed on the seepage properties of the sealing property anti-seepage curtain and drainage curtain in region of branch penstocks when high pressure water cracking. The result shows that the measure for water tightness and drainage is effective to control high pressure penstocks leakage and to improve distribution of seepage gradient of rock mass and ensure powerhouse safety.