软基重力坝防渗帷幕优化设计分析

针对尼泊尔波迪·科西水电工程首部枢纽布置和软土坝基的岩性条件渗透特征，结合防渗帷幕的优化设计，通过三维渗流计算，以渗漏量为控制条件，对地层渗透性、帷幕的防渗性能及帷幕深度和长度的敏感性分析，优选出帷幕深度和长度，为工程优化设计提供依据．

Impervious Wall Optimization Design of Gravity Dam on Pebble Foundation

According to the layout, condition of pebble foundation and character of penetration of Bhotekoshi hydroelectric project headworks, with the seepage quantity as control factor and through three dimensionseepage calculation, sensitivity analyses to the seepage characters of different layers and the imperviouscharacter, length and width of impervious wall as well are carried out, eventually the most appropriate length andwidth of the impervious wall are figured out. The result provides the foundation for the optimization design.