Applicable in mixed-grained soils, such as sandy silts to cohesive soils with an undrained shear strength of 20 to 80 kN/m² by the addition of coarse granular backfill. Suitable for light to medium building loads.

As an alternative form of vibro displacement technique, the VIPAC process can be used to construct sand and gravel columns simply and economically. The displacement work is effected by vertical vibrations that are generated by a vibro hammer. The process involves repeated raising and lowering of the vibrator tube. The resulting column diameter is generally slightly larger than the diameter of the tube. A telescopic loader can fill the VIPAC system with backfill material even as the tube is vibrated into the ground.