Engineering Characteristics of Concrete Face Rockfill Dam

The retaining dam of Gongboxia Hydropower Station is a reinforced concrete face rockfill dam (CFRD) with a maximum height of 132.2m and a crest width of 10.0m. The dam site is located at higher seismic region where the canyon is asymmetric, and it is cold with the temperature changing dramatically, the rock property varies with complexity, and the excavated materials differ greatly in quality.These characteristics have been adequately considered in design, and the domestic and oversee advanced technology and experiences have been applied. These technology and experiences include: setting strong pervious zone, concrete extruding wall, high plinth wall at left and right banks; equalized rising of embankment fill in full section and once continuous construction for concrete face slab, etc. These methods guarantee the advanced design of the dam, speed up the construction progress and ensure the construction quality.