Geopier ArmorpactTM


The Geopier Armorpact system is a leap forward in improving poor soils created through research by Geopier Foundation Company.  The patented system is a cost-effective solution for supporting buildings and other structures in very soft clay and organic soils.


The Armorpact Construction Process

The Geopier Armorpact construction displaces the very soft soils during installation and utilizes vertical impact ramming to construct Rammed Aggregate Pier elements for settlement control.  They are built in the following manner:

  1. The Armorpact sleeve is placed on the specially designed tapered mandrel and is driven into the ground using a strong static force augmented by high frequency vertical impact energy. Depths normally range from about 10 to 20 feet. 
  2. The confining sleeve remains in place. Aggregate is placed and densified inside the sleeve. Compaction is achieved through static down force and dynamic vertical ramming from the hammer and mandrel. The process densifies aggregate vertically and forces the aggregate and confining sleeve laterally, expanding into the soft matrix soil. 
  3. Following installation, RAP elements support shallow foundations, floor slabs and mats; reduce liquefaction potential; and improve stability support of embankments, walls and tank pads. The applied stresses are attracted to the stiff RAP elements, resulting in engineered settlement control. 

Construction and Design Advantages

  • Engineered by local GIE geotechnical engineers familiar with your geology
  • Cost-effective
  • Normal spread footings and slabs-on-grade
  • Eliminates spoils and temporary casing
  • Armorpact sleeve provides long-term protection against bulging (creep)
  • Allows Rammed Aggregate Pier construction in very soft clay and organic soils
  • Rapid Installation

The Armorpact Construction Process

  Click this <PDF link to download the Geopier Armorpact brochure.