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| Product & Process Technologies |
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| The Intermediate Foundation System |
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Geopier Rammed Aggregate Piers™ (RAPs) reinforce poor to good soils, including soft to stiff clay and silt, loose to dense sand, organic silt and peat and uncontrolled fill.
The unique installation process utililizes vertical impact ramming energy to construct Geopier RAPs, which exhibit unsurpassed strength and stiffness. Geopier RAP solutions are designed to provide total and differential settlement control and increase bearing support to meet project requirements.
The construction process is remarkably simple and fast:
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Drill a cavity to depths ranging from seven to 30 feet. |
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Layers of aggregate are introduced into the drilled cavity in thin lifts of one-foot compacted thickness. A patented beveled tamper rams each layer using vertical impact ramming energy. The tamper densifies aggregate vertically and forces aggregate laterally into cavity sidewalls. This results in excellent coupling with surrounding soils and reliable settlement control. |
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Following installation, Geopier RAPs reinforce slopes and embankments and support shallow foundations. The footing stresses are attracted to the stiff RAPs, resulting in engineered settlement control. |
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The total construction process is characterized by a high frequency, high energy but low amplitude ramming action. Geopier rates the energy of installation apparatus up to 1.7 million ft-lb. per minute, while the ramming frequency generally varies from 300 to 600 cycles per minute. The Geopier System has very little vibratory impact on adjacent structures – a definite advantage in high-density, urban construction settings. |
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