银盘水电站基础约束区混凝土高温浇筑温控措施与效果

大体积混凝土高温浇筑温控防裂是现代大体积混凝土结构设计、施工中十分重要的研究课题，对于保证大体积混凝土施工质量、加快施工进度等具有关键性作用。银盘水电站受截流时间推后及左岸边坡地质等因素制约，整个二期工程基础约束区混凝土全在高温季节施工。通过采取事前专题研究及技术咨询，过程采取原材料的优选、调整配合比、严格控制混凝土出机口温度和浇筑温度、个性化初期冷却通水等综合控制措施，成功攻克高温季节基础约束区混凝土浇筑的难关．取得了良好的效果，为高温季节水电站基础约束区大体积混凝土浇筑积累了宝贵经验。

Temperature Control Measures and Effects of High Temperature Concrete Pouring in Foundation Restraint Area of Yinpan Hydropower Station

The temperature and crack control are key research project in the structure design and construction of modern massive concrete construction, which is of importance to ensure the construction quality of massive concrete and accelerate construction process and so on. Because of delayed river closure and the comprehensive slope geological conditions on left bank of Wujiang River, all of the concrete in foundation restraint area in the stage II for project of Yinpan Hydropower Station had to be constructed under high temperature. By the application of such temperature and crack control measures as raw material optimization, the adjustment of concrete mixture proportion, the control of concrete temperature at batching plant outlet and environmental temperature in the construction placement, water cooling at initial stage etc, the key problem of high temperature massive concrete construction in foundation restraint area of Yinpan Hydropower Station was solved successfully, without any big temperature crack, which provided valuable experience for high temperature mass concrete construction of hydraulic and hydropower engineering.