Continuous Flight Auger Piles
In CFA each pile is formed by rotating and advancing a continuous flight auger into
the ground to the required depth whilst the bore spoil travels up the auger string
to the surface for disposal.
The concrete is then pumped, under pressure via the hollow stem of the auger to
the toe of the bore. Once pumping starts, the auger is progressively withdrawn bringing
soils with it to the surface. The concrete pumping process is monitor by the rig
operator ensuring pressure is maintained. Once the pile is formed the rig pulls
off the pile position so that reinforcement can be placed into the pile.