Practice & Effect of Impact Rolling Technology Applied In Dam Rock-fill Body of Hongjiadu Hydropower Station

The application of impact rolling technology in construction of rock-fill dam of Hongjiadu Hydropower Station is the first example in same dam type at home and abroad. Analysis on samples collected at site made known the dry density of subordinate rock-fill body basically come up to the requirement of main rock-fill body, and the dry density of main rock-fill body reach up to more than 2.190 t/m after impact rolling. Application of the technology can not only raise dry density of rock-fill body, but also shorten construction period, reduce deformation of the dam body during operation period.