LandTech has gotten the opportunity to work on a wide variety of projects that has exposed us to unique construction technology. We’re performing construction surveying stakeout of a project that is utilizing a Rammed Aggregate Pier (RAP) system.
Geopier Foundation Company, a subsidiary of the Tensar Corporation, developed the first RAP system in 1989. According to their website:
Geopier Rammed Aggregate Pier™ (RAP) systems are efficient and cost effective Intermediate Foundation® solutions for the support of settlement sensitive structures.
Geopier® technologies are constructed by applying direct vertical ramming energy to densely compact successive thin lifts of high quality crushed rock to form high stiffness engineered elements. The vertical ramming action also increases the lateral stress and improves the soils surrounding the cavity, which results in foundation settlement control and greater bearing pressures for design.
Depending on site requirements, RAP systems can be installed using replacement or displacement methods. The unique installation process utilizes vertical impact ramming energy, resulting in unsurpassed strength and stiffness. RAP systems are used to reinforce good to poor soils, including soft to stiff clay and silt; loose to dense sand; organic silt and peat; variable, uncontrolled fill; and soils below the ground water table.
See more at: http://www.geopier.com/Geopier-Systems/Rammed-Aggregate-Pier-Systems
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