洮河九甸峡水利枢纽工程混凝土面板堆石坝设计

九甸峡水利枢纽工程混凝土面板堆石坝最大坝高136.5 m,坝址区地震烈度高,河谷狭窄,岸坡陡峻,河床分布深52～54 m、宽30～50 m左右的深厚覆盖层,为目前国内在深厚覆盖层修建的最高面板堆石坝.文中介绍了该混凝土面板堆石坝的布置、坝体分区、坝料设计、趾板结构、周边缝结构设计等,特别研究比较了河床深厚覆盖层平趾板处理措施和采取防渗墙截渗的结构特点,同时对于在覆盖层上修建高面板堆石坝进行了有益的探索.

Design of concrete face rock-fill dam for Jiudianxia Water Project on Taohe River

The concrete face rock-fill dam(CFRD),with the dam height of 136.5 m,for Jiudianxia Water Project on Taohe River is the highest CFRD constructed on deep overburden at present in China,which is built within a dam site with high seismic intensity,narrow river valley and steep bank slopes.The overburden on the riverbed therein is about 52 m to 54 m in width and about 30 m to 50 m in depth.The design features of the dam are presented herein,which includes: the general layout;the zoning of the dam body;the selection of the construction material for the dam;the design for the structure of the toe slab and the design of the construction peripheral joint etc.Especially,the comparison made on the structural features between the flat toe slab on the deep overburden and the cut-off wall constructed into the foundation is studied,and then the related techniques for the construction of CFRD built on deep overburden are discussed as well.