伊朗塔里干水利枢纽地下厂房防渗排水系统设计与研究

Design of seepage control and drainage system for underground powerhouse of Taleghan dam & HPP project in Iran

塔里干水利枢纽电站属库岸式地下厂房,地下洞室数量较多,结构多样,工程区域地层岩性为砾岩夹砂岩,岩体中构造不发育,总体呈块状较完整。针对库岸式地下厂房蓄水后期地下水较丰富的特点,参照已建类似工程进行了三维渗流计算分析研究,采用在洞室群外围与厂房顶分层设置防渗帷幕、排水洞,并在排水洞内设排水幕等防渗排水系统。电站目前运行实践表明,地下厂房防渗排水系统设计满足渗流控制要求,是安全、合理的。

Taleghan Dam HPP project has a reservoir bank type underground powerhouse composed of many caverns with different structures.The strata lithology in the project area is sandstone intercalated with conglomerate,discontinuities undeveloped,and rock mass blocky and intact in general.In view of rich underground water at later stage of reservoir impoundment,3D seepage calculation and analysis was made as per existing similar projects,and impervious curtain and drainage tunnels were provided in layers outside the group of caverns and on the roof of the powerhouse.The operation of the plant proves that the design of seepage control and drainage system can meet the requirements of seepage control,and the system is safe and reasonable.