Dynamic Replacement

Dynamic Replacement (DR) column is formed by a heavy pounder with a weight varies from 10 tons to 20 tons drop height ranging from 10 m to 20 m on a 0.6 m to 1.0 m thick granular material working platform. A single column is form by a few series of pounding. Large diameter (1.6 m to 3.0 m) columns are driven to a depth from 4 m to 6 m depth. Following the installation of DR column, the ‘’ironing phase’’ is executed where the working platform and the top layer of soil are compacted. This process is normally performed by using a flat-shaped pounder with a square base.