寒冷地区混凝土面板堆石坝垫层的设计

Design on Cushion Layer of Concrete Face Rockfill Dam in Cold Region

对于寒冷地区的钢筋混凝土面板堆石坝，应根据水库运行特征分区考虑垫层的设计．冬季水位以上区域重点考虑防冻涨问题；水位以下区域考虑垫层的基础及防渗两种功能协调共同发挥作用的问题．对于寒冷地区，垫层宽度的选择是造价、可靠性和施工进度要求的综合考虑结果．施工方法也是设计寒冷地区面板坝时必须考虑的主要因素之一．

In the design of Concrete Face Rockfill Dam in the cold region, the condition of reservoir operation should be taken into the consideration in chosing the materials of the cushion layer, so as to put the emphasis on anti frozen and swelling in the zone above the water level in the winter, and make two functions of the cushion layer act harmoniously in the zone under the water level. The width of the cushion layer results from comprehensive consideration of structural liabi1ity' construction cost and schedule. The constructing method is one of the key factors in the design of Concrete Face Rockfill Dam in the cold region.