This document discusses the process of vibroflotation, a method used to compact soils like sand by using a vibrating probe. Vibroflotation involves lowering a cylindrical probe with an eccentric mass and water jets into the ground. The vibratory force and water jets densify the soil to a depth of up to 70 meters. As the probe is withdrawn, the compacted soil settles and a crater forms that is then filled with granular backfill. Case studies demonstrate how vibroflotation has been used effectively for large land reclamation and port expansion projects.