Auger cast piles (or CFA piles) are created by drilling a hollow-stemmed auger to depth, then pumping grout/concrete through it as the auger is withdrawn, forming a cast-in-place pile, offering high-capacity support with minimal noise/vibration for structures like buildings, bridges, and retaining walls, especially in sands and silts. They are cost-effective, and can be reinforced with steel, supporting loads through friction and end-bearing.
