龙滩水电站施工规划设计的几个问题

龙滩水电站主体工程建设共分为５个标。其施工导流选用隧洞导流方式，围堰采用碾压混凝土过水围堰，挡水标准为１０年一遇，挡水流量１４７００ｍ３／ｓ，该围堰拟由承包商设计，挡水标准可适当降低。经方案比选，施工总进度采用７年半发电方案。大坝混凝土量约６０１万ｍ３，主要浇筑期４１个月，选用进口高速皮带机运输上坝，仓面塔式布料机浇筑为主，缆式起重机为辅的混凝土运输浇筑方案。

Several problems in construction planning and design of Longtan Hydropower Station

The main project construction of Longtan Hydropower Station will be divided into 5 bids. The construction diversion will be tunnel diversion. The cofferdam will be RCC overflow cofferdam with retaining standard of ten-year flood and retaining discharge of 14 700 m3/s. This cofferdam is planned to be designed by the contractor and then the retaining standard could be lowered properly. Based on comparation and selection,power generation of the station will be 7. 5 years after the construction commencement,which has been adopted in the total construction progress. The volume of dam concrete will be about 6. 01 million m3. The main pouring period will be 41 months. The imported high-speed belt conveyor will be used. The concrete pouring plan will take tower unloader as main and take cable crane as supplementary.