龙首水电站碾压混凝土大坝施工

Construction of the RCC dam for Longshou Hydropower Station

龙首水电站工程双曲薄拱坝坝高 80m ,厚高比 0 16 8,采用全断面碾压混凝土施工。坝址区气候环境恶劣、夏季酷热 ,冬季严寒 ,年均降雨量 171 6mm ,蒸发量 1378 7mm ,气候干燥。针对这些工程特点 ,天然砂石料生产采用干法生产 ,碾压混凝土施工采用了全年连续施工 ,在低温季节采取冬季施工措施 ,保证了碾压混凝土质量。龙首水电站已下闸蓄水达正常高水位 。

The double curvature thin arch dam for the Longshou Hydropower Station has the height of 80 m and its ratio of thickness to height is 0.168. It is constructed by the full face RCC pouring technology. The dam site has poor climate: extremely hot in summer and extremely cool in winter. Its mean annual rainfall is 171.6 mm and the evaporation volume 1378.7 mm so that it is dry weather. In accordance with these characteristics, the natural sand and rock materials is produced by the dry method. The RCC construction is conducted in the whole year in a continuous pouring way. When it is in low temperature season, special construction measures in winter have been adopted in order to guarantee the RCC quality of the Project. The Longshou Hydropwoer Station has impounded water to its normal pool level and its operation is good.