Continuous-flight Auger Piles

CFA Rig

CFA Rig

National Driller Magazine has a nice overview article of Continuous-Flight Auger Piles that was featured in their Foundation Drilling Newsletter. It’s a decent overview for those unfamiliar with CFA Piles. This type of deep foundation involves drilling the entire length of hole in one continuous operation, and then pumping concrete or grout down the hollow center of the pile as the auger is withdrawn. [Source: National Driller. Image: Hercules Machine Corporation]