Rampact® System for Compaction & Stabilization of Soil

The Rampact® pier system is another Geopier stabilization method for soils that simply won’t stay open during drilling.  Rather than using a displacement auger, Rampact piers are installed using a tapered mandrel outfitted with a patented compaction chamber to penetrate through caving soils and construct piers from the bottom up. This method allows for the construction of high-quality Rammed Aggregate Piers (RAPs) below the groundwater table without having to worry about contamination and/or fouling of the aggregate.  The end result of Rampact® is a dense column of aggregate surrounded by stiffened matrix soils that provide excellent settlement control and allow for higher foundation bearing capacities.

• Caving sands below the groundwater table and soft squeezing clays and silts
• Debris-laden fill soils – tapered mandrel displaces obstructions

Geopier Rampact® piers are installed by advancing a tapered displacement mandrel through unsuitable soils to a desired design depth. Once at depth, the mandrel is withdrawn several feet to allow open-graded aggregate to flow into the annular space.  The mandrel is then redriven to create a densified 2-foot-thick lift of aggregate.  This soil stabilization method is repeated up to the ground surface to create a dense column of aggregate surrounded by stiffened matrix soils.    

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