The CFA technique is used to produce in-situ concrete piles Using conventional excavators, together with the KRX attachment range, makes the process very flexible and cost-effective. Productivity is higher when compared to using cased drilling methods.

To create piles, hydraulic power from the excavator is used to continuously rotate an auger attached to the excavator that is the full length of the pile. The auger is driven into the soil to the desired depth (piling depth) and then raised while at the same time concrete is pumped via the flushing head and hollow auger to the drill bit to fill the hole. During the entire process, the auger keeps the borehole stabilised. As required, reinforcement cages, steel girders or casing can be subsequently installed into the fresh concrete.