Vibro Compaction is a deep compaction technique for densifying sandy soils in place, by means of an electrical
vibrating probe. Under the influence of vibration, loose sand particles are rearranged into a more compact state
to achieve a higher relative density. The improved subsoils will enhance load bearing capacity and reduce impacts
associated with ground settlement. In areas with seismic activity, vibro-compaction also decreases the potential
for liquefaction.
Vibro Stone Columns are installed by adding crushed stone as a backfill during the vibratory ground improvement
process. Stone backfill is introduced from ground surface for the wet top feed stone column installation method.
Stone backfill is delivered through a separate duct along side the vibroprobe for dry bottom feed stone columns.
The stone column also can serve as a vertical drain, thus reducing excess pore pressure buildup caused by rapid
shear loading or earthquakes, making the subsoil less likely to liquefy during a seismic event.
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US Gypsum Plant Rainer, Oregon
Over 10,000 Vibro Compaction and Stone Columns were completed to improve foreshore stability and for
foundation support of plant and facility encompassing 20 acres of reclaimed land.
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