Test study on dynamic characteristics of flyash used as drainage blankets of dams;

In order to study the possibility, for using flyash as the drainage blanket materials of dam, based on a series of static and dynamic laboratory tests the dynamic response of the dam under earthquake load was inverstigated Based on Biot wave theory, the interaction effects of water and soil and the nonlinear properties of soil were regarded.

In the light of the waterlogging forming reasons in the built area and combined with the areal drainage conditions, the planning is considered to adopt the principle of high water level and high-speed drainage, low water level and low-speed drainage, and waterlogging water pumping and drainage for prevention.