在流量大河槽深的河道上,岩滩水电站截流采取深河槽平堵预抛、龙口设置拦石栅、龙口抛投石串和钢筋笼等几项截流措施,大大降低龙口截流难度;在深槽回流大的围堰防渗闭气施工中,通过实践,摸索出动水铺设帆布和软体排等新工艺,使截流、闭气、基坑抽水一次成功。 In the rivers with large flow channels and deep trenches, the closure of the Yantan Hydropower Station adopts pre-tossing of deep river troughs and horizontal cut-offs, setting of stone blocks at Longkou, throwing stone strings at the mouth of Longkou, and reinforcement cages, which greatly reduce the difficulty of river closure; Large cofferdam impermeable gas construction, through practice, worked out the water laying canvas and software row and other new technology, so that closure, airtight, pit pumping a success.