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The Geopier® System uses replacement Rammed Aggregate Pier® (RAP) elements to reinforce good to poor soils, including soft to stiff clay and silt, loose to dense sand, organic silt and peat and variable, uncontrolled fill.
Advantages of the Geopier® System
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Rammed. Vertically ramming thin lifts of aggregate is the key to providing strength and stiffness. |
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Strength. Vertical impact ramming results in high density and high strength RAP elements that provide superior support capacity. |
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Stiffness. Vertical impact ramming results in high pier stiffness that provides excellent settlement control. |
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Proven. Thousands of structures are currently supported – proven experience that ensures high levels of performance and reliability. |
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Economical. Often results in 20% to 50% savings compared to traditional deep foundation alternatives. |
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Fast. Rapid installation process means shorter construction schedules. |
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The Construction Process
The unique installation process utilizes pre-augering and vertical impact ramming energy to construct RAP elements, which exhibit unsurpassed strength and stiffness. RAP solutions are designed to provide superior total and differential settlement control and increased bearing support to meet project requirements.
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The process first involves drilling a cavity. Drill depths normally range from about seven to 30 feet, depending on design requirements. Pre-drilling allows you to see the soil between the borings, ensuring that the piers are engineered to reinforce the right soils.
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Layers of aggregate are then introduced into the drilled cavity in thin lifts of one-foot compacted thickness. A patented beveled tamper rams each layer of aggregate using vertical impact ramming energy, resulting in superior strength and stiffness. 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, RAP elements reinforce slopes and embankments, support shallow foundations, floor slabs and tank pads. The footing stresses are attracted to the stiff RAP elements, resulting in engineered settlement control.
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Applications
