黄登水电站地下厂房洞室群防渗排水设计

Design of Seepage Prevention and Drainage of Underground Powerhouse in Huangdeng Hydropower Station

黄登水电站地下厂房地段地下水位线较高,且距水库较近,为降低围岩的外水压力,以利于地下洞室的围岩稳定,同时也为防止地下水向地下厂房渗漏,在地下厂房顶部及四周设置防渗及排水系统。防排水设计采用“以排为主,防、排、堵、截相结合”的综合治理措施。通过一段时间的运行,证明其防渗排水系统的设计是合理的。

The underground water level of underground powerhouse in Huangdeng Hydropower Station is higher, and the underground powerhouse is close to the reservoir. In order to decrease external water pressure of surrounding rock, facilitate the stability of surrounding rock of underground powerhouse, and prevent groundwater seepage to the underground powerhouse, anti-seepage and drainage system are set on the top and around the underground powerhouse. The comprehensive treatment measures of “taking drainage as the main measure, combining prevention,drainage, blocking and interception” are adopted in the design of water prevention and drainage. Through a period of operation, it is proved that the design of the anti-seepage and drainage system is reasonable.