Column consolidations obtained by disintegrating the soil mixing it simultaneously with a cementitious suspension through nozzles of various diameters and with pressures up to 600 bar. There are three different methodologies that differ essentially from the number of fluids adopted: Single-fluid Jetting: the same blend (boiacca) is used both for disintegrating action and for stabilizing action; Double-fluid Jetting: the disgregating action of the boiacca is accompanied by a Compressed air jet in order to favor the “infiltration” of the fluid into the ground. Three-fluid Jetting: provides a fluid for the disintegrating action and a fluid for stabilizing action. The disaggregating action is achieved by high speed water jet with or without compressed air. The stabilizing action is entrusted to boiacca pressure jet.