某抽水蓄能电站地下厂房F_(60)断层处理措施

Treatment Measures for F_(60) Fault of Underground Powerhouse of a Pumped Storage Power Station

某抽水蓄能电站地下厂房部位F_(60)断层斜切经过了三大洞室(包括副厂房、主变洞、尾闸室),且延伸到输水系统。F_(60)断层规模较大,与上游其它断层连接。为保证地下厂房运行安全,在原设计的防渗排水系统的基础上,对F_(60)断层进行了处理,主要采取了“堵排结合,以排为主”的方案,即在已有廊道内进行帷幕灌浆和布置系统排水孔。通过F_(60)断层处理,经监测和检查后,该部位渗水量较小,说明处理措施是有效合理的,保证了厂房的运行安全。

In the underground powerhouse of a pumped storage power station,fault F_(60) cuts diagonally through three large chambers(including auxiliary powerhouse,main transformer tunnel and tail gate chamber)and extends to the water conveyance system.F_(60) fault is large in scale and connected with other upstream faults.In order to ensure the operation safety of underground power house,fault F_(60) has been treated based on the original design of seepage-proof drainage system.It mainly adopts the scheme of combination of plugging and draining and mainly draining,curtain grouting and system drainage holes are arranged in existing galleries.After F_(60) fault treatment,the seepage volume in this area is small after monitoring and inspection.It shows that the treatment measures are effective and reasonable and ensure the operation safety of the plant.