Penetration Assisted by jetting water, the oscillating vibrator penetrates to the designed depth under its own weight. Thereafter the water jets are adjusted in such way that an annular space remains open around the vibrator and its follow tubes

Replacement upon reaching the required depth, coarse grained backfill material is now filled into the hole down to the toe of the vibrator. By moving the vibrator in small steps up and down and by the horizontal forces of the machine itself, the supplied stones are pressed into existing soil.

Finishing With stones being added as required this process is repeated up to ground level, leaving on completion a well compacted, tightly interlocked stone column surrounded by soil enhanced density