CFA Piles (Auger Cast) are semi-displacement deep foundation elements that are cast-in-place using a hollow stem auger with continuous flights.

Common Uses

  • Support structures

Technical Details

CFA piles (also referred to as auger cast piles) use an auger to drill through the ground and reach design depth. As the auger is slowly removed from the ground, it removes the soil and rock with it and pumps either concrete or grout through the hollow stem into its place. Careful control of the concrete pressure and volume must be maintained to ensure no defects occur in the continuous pile. A welded reinforcing steel cage is then lowered into the wet concrete or grout. This technique has been used to support buildings, tanks, modules, process equipment pipe racks and other structures.