斐济南德瑞瓦图水电站大坝工程导流设计

River Diversion Design of Dam Project at Nadarivatu Hydropower Station in Fiji

斐济南德瑞瓦图水电站大坝工程施工导流是整个项目的难点和关键点之一,坝址区河谷属于典型的山区"V"型河谷,两岸均为高达数百米的陡峭岩壁,场地狭窄,施工导流布置非常困难。项目部经过多次进行方案调整和优化,最终采取了适当降低枯期导流标准、分期导流、冲沙底孔过流的方案,成功解决了大坝施工导流难题,顺利完成了大坝二枯的施工,取得了良好的社会和经济效益。

River diversion during construction of dam project at Nadarivatu hydropower station in Fiji is one of difficulties and key points in the whole project.The valley in the dam site is a typical V-shaped valley with steep slopes up to hundreds of meters in both banks.The site is narrow and construction river diversion layout is very difficult.After many times of scheme modifications and optimizations,the scheme of properly reducing river diversion standard during low flow period,stage diversion construction and flow passing through sand-flushing outlet is finally adopted,which well solves difficult dam construction river diversion problems,successfully completes dam construction in the second dry season and gains better social and economic benefits.