Abstract: This paper discusses the difference between waterproofing of building structures and seepage control of hydraulic structures based on the development and application history of geomembrane materials. Through referencing, analysis, exploration and innovation, we describe a new type of dams, namely geomembrane face rockfill dams that use geomembrane as the main material for seepage control. Several projects are analyzed to demonstrate the trend in dam seepage control development. It is thought that geomembrane will become one of the best choices for seepage control in concrete face rockfill dam (CFRD), even can be an inevitable alternative for face rockfill dams and roller compacted concrete dams.

Key words: geomembrane, concrete face rockfill dam (CFRD), seepage control, design method