小湾施工组织设计的改进

Modified Construction Design of Xiaowan Hydropower Station

小湾电站可行性报告中，坝身布置的孔口大多，影响施工速度；由于大坝施工进度慢，水库在开工后的第１２年汛期才能开始拦蓄洪水．应加大坝身孔口的尺寸，减少坝身孔数，以加快施工进度，同时提高工作水头，提前拦蓄洪水；在施工组织设计中要充分认识发生滑坡的可能性，并加强防滑坍措施；在施工时的温度控制、温度标准、灌浆温控以及混凝土配比、拌和、浇筑等方面均应认真研究．

In the Feasibility Report of Xiaowan Hydropower Station,construction schedule will be much slowed down due to more orifices in the dam body,reservoir filling will start 12 years later after the construction of reservoir has begun. It is expected that the reservoir to be filled after the 13th flood period thereby. The author considers that it is better to enlarge the size and reduce amount of orifices in the dam body,rsise high working head,the construction schedule will be sped up then and reservoir filling will be brought forward.The possibility of landslide should be fully considered,slide control measures should be strengthened in the construction design. Temperature criterion and control,grouting temperature control, concrete proportioning,mixing and placement should be studied carefully.