The vibrocompaction technique, also known as vibroflotation, is suitable for compacting thick layers of loose granular deposits (gravels, sands).
The maximum depth of compaction is typically limited by the lifting equipment. Depths up to 30 metres have been achieved.

Top feed vibroflot 

Used for vibro compaction and vibro replacement construction in general condition Gravel or backfill sand is filled from top of borehole，
It's wildly commonly used vibroflotation equipment Economy and efficient vibro construction method.

Bottom feed vibroflot

Used for the silty clay soil condition where shearing strengthen of non-drainage less than 20Kpa
Used for under-water vibro construction