Auger cast piles are a type of drilled foundation and are both end-bearing and friction-based. Pile diameters of 12” to 18” are typical, but larger piles are available.
Auger cast piles are installed by rotating a continuously flighted hollow shaft auger into the soil to a specified depth. High strength cement grout is pumped under pressure through the shaft as the auger is slowly withdrawn. Reinforcing steel is added per pile specifications.