Ground Response to Dynamic Compaction

Field measurements from over 120 sites have been collected to study current practice and determine if similarities exist in the response of the ground to site improvement by dynamic compaction. Data were obtained from published reports and files. Ground conditions at these sites were quite diverse, including natural sands, hydraulic fills, rubble, clay fills, and miscellaneous materials. General trends are presented which show that crater depths, ground vibrations, and the depth of influence increase with the energy per blow. The magnitude of induced subsidence, static cone resistance, standard penetration resistance, pressuremeter modulus, and limit pressure tend to increase with the applied energy per unit area.