Innovative Foundation Solutions™
Ground Improvement

Ground Improvement Uses Diverse and Innovative Techniques to Change the Engineering Properties of Soils for More Efficient and Cost-Effective Design Options

 

Rapid Impact Compaction in Action

Why Ground Improvement?

Rapid growth across Canada, specifically in recent decades, has seen high-quality land become scarce or unusable. Weak and highly compressible or collapsible soils often create serious negative consequences for a project if they are not significantly improved. Modification or improvement of soils plays an important role in terms of foundation stability, particularly in situations relating to load-bearing soils under new or existing structures. Ground improvement has distinct advantages when compared to over-excavation or ground replacement.

What is Ground Improvement?

Ground improvement is the stabilization of soils to increase their bearing capacity, provide stability, control seepage, and provide liquefaction resistance. GeoSolv’s Geo-Structural Engineering Team provides sound recommendations for ground improvement that include rigorous analyses of site soils and applied structural loads, along with the use of specialized equipment and construction procedures for modifying the ground’s character, with or without the addition of engineered material. Technologies to do so include: GP3® SystemImpact® SystemRampact® SystemX1® SystemDensipact® System and Rapid Impact Compaction.

How is Ground Improvement Achieved?

The feasibility of a ground improvement approach for your project can be assessed based on the available geotechnical information and an understanding of the proposed structure and site works. Having a complete picture of the geology and geotechnical conditions of the site, a clear understanding of the planned structure, loading conditions, planned structure elevations and site grades−along with the clear identification of compressible or other weak soils prior to completing a detailed design is critical to project success.

1. GP3® System

GP3 System GeoSolv

The Geopier GP3 system is constructed by auguring a cavity and vertically ramming lifts of aggregate (gravel or recycled concrete) within the cavity and driving the aggregate laterally into the side walls. This action creates stiff rammed aggregate piers and results in superior bearing capacity and settlement control through friction, without the need for bulk excavation or deep foundation (piling) systems. 

The GP3 System is a versatile and effective replacement for over-excavation, deep foundations (including driven piles, drilled shafts or auger cast-in-place piles).

Improve up to 16m depths with 600mm to 1200mm diameter elements for high loads in clays, silt, fill, and trapped topsoil.

To request a no-obligation project assessment or feasiblity study for your next project contact GeoSolv.

2. Impact® System

Impact System

The Geopier Impact system is constructed by driving a hollow, valved mandrel into the soil through heavy crowd force and vertical impact energy. Aggregate (clear stone) is placed within the mandrel and flows into the displaced cavity, opening the valve, as the mandrel is retracted. The mandrel is then driven back down, closing the valve and creating a compacted lift. Repeated raise and redriving action of the valved mandrel creates stiff rammed aggregate piers and results in superior bearing capacity and settlement control in friction, without the need for bulk excavation or deep foundation (piling) systems. 

Improve up to 16m depths with 400mm to 600mm diameter elements for high loads in sands, silt, fill, and trapped topsoil. The Impact system can be installed in high groundwater conditions.

The system provides for a zero-spoil approach for contaminated sites, and can provide large savings versus piles, caissons or dig-replace methods.

To request a no-obligation project assessment or feasiblity study for your next project contact GeoSolv.

3. Rampact® System

Rampact System

The Geopier Rampact system is constructed by driving a tapered and hollow valved mandrel into the existing soils through heavy crowd force and vertical impact energy. Aggregate (clear stone) is placed within the mandrel and flows into the displaced cavity as the mandrel is retracted. The mandrel is then driven back down, creating a compacted lift. Repeating this action to the surface creates stiff columns of rammed aggregate and results in superior bearing capacity and settlement control through friction without the need for bulk excavation or deep foundation (piling) systems. 

This displacement method is ideal for contaminated sites where excess soil management or over-excavation is not feasible or cost effective. Rampact® elements also provide effective support in moderately shallow deposits of man-made fill and other diverse soils where casing may be a challenge.

Improve up to 10m depths for light to moderate loads with 500-800mm diameter elements in sand, silt clay and fill. The Rampact system can be installed in high groundwater conditions.

To request a no-obligation project assessment or feasiblity study for your next project contact GeoSolv.

4. X1® System

X-1 System

The Geopier X-1 system is constructed by auguring a cavity and vertically ramming lifts of aggregate (gravel or recycled concrete) within the cavity and driving the aggregate laterally into the side walls. The X-1 system is a unique combination replacement/displacement technique that has the ability to build through caving soils to created stiff rammed aggregate piers. The result of the X-1 installation is superior bearing capacity and settlement control without the need for bulk excavation or deep foundation (piling) systems. 

The X1® system drilling operation allows for visible inspection of the hole opening and the opportunity to address changing ground conditions as they happen. Its performance, flexibility, and cost-effective qualities make it the ideal solution for reinforcing a variety of soils.

Improve up to 16m depths with 450 to 900mm diameter elements in sand, silt, clay, fill and trapped topsoil.

To request a no-obligation project assessment or feasiblity study for your next project contact GeoSolv.

5. Densipact® System

Densipact System

The Geopier Densipact system is used to increase the density of sandy soils. Metal fingers (tines) are driven into the loose sands by heavy crowd and vertical ramming energy, densifying the surrounding soils. The displaced cavity is then backfilled with on-site materials and the process is repeated until the desired densification have been achieved.

The Densipact® system replaces dynamic compaction, over-excavation, deep foundations (including driven piles), drilled shafts and augured cast-in-place piles. This high-performing system provides unsurpassed strength and stiffness, and eliminates casing and allows for construction in soils that are prone to cave-ins, high water levels, and liquefaction (water build-up). Additionally, the Densipact® system provides very high bearing pressures to ensure consistently high levels of performance and reliability.

Improve up to 10m depths with 1000mm to 2000mm diameter treatment zones for loose sand and sand fill for very high bearing capacities.

To request a no-obligation project assessment or feasiblity study for your next project contact GeoSolv.

6. Rapid Impact® System

Rapid Impact System

The Rapid Impact Compaction (RIC) system uses an excavator mounted 7.5 – 9 ton hydraulic weight which is repeatedly dropped on a 1.5 m tamper foot to densify shallow, loose and granular soils up to 6 – 7 m deep for low to moderate bearing capacities. This process is an equivalent alternative to bulk excavation and engineered fill. GeoSolv can work with the worst soils, not just sandy soils. To find out more about how our systems are installed, contact GeoSolv.

 

 

 

 

 


        
sc