Ground improvement is used to modify the properties of the underlying soil or to build stiff elements within the soil to achieve desired performance.
- Improve bearing capacity
- Reduce settlement, penetrability, and swell potential
- Mitigate liquefaction
- Improve slope stability
- Collapse or fill voids
- Accelerate surcharging
Ground improvement practices differ based on soil conditions and what technique is used. Granular soils can be improved through densification using vibration or displacement. Composite materials can be improved through reinforcement by building or inserting stiff elements or inclusions into the soil. Other soils can be improved with permeation or mixing with cementitious materials. Vertical drains are used to decrease the amount of time it takes to settle and strengthen soils.
Continuous Flight Auger (CFA)