白鹤滩水电站大寨沟泥石流综合治理研究

Treatment design of the debris flow of Dazhai gully at Baihetan hydropower station

大寨沟位于白鹤滩水电站右岸进水口上游约300 m,为低频率大型粘性泥石流沟,威胁电站的施工与运行。根据大寨沟泥石流特性和主体工程建设需要,采用"排导明渠(槽)+堆渣压坡+局部抗滑桩"进行综合处理,沟内修建拦沙坝、堆渣和排导渠,下游开挖山体形成排导槽将泥石流改道排出主体工程区,确保了电站施工期和运行期的安全。

Dazhai gully,located 300 m upstream the right water inlet of Baihetan hydropower station,is a low frequency but large viscosity debris flow gully which threats the construction and operation of the station.Based on the gully properties and the construction requirements,treatment scheme including"open discharge channel(slot)+pilings+local slide-resistant piles"is adopted.Silt-trap dams,pilings and open discharge channel are built.The mountain downstream is excavated to form an open slot to discharge the debris flow,by which the station safety is guaranteed.