CFA method is a system used in construction of bored piles. Pile drilling is made with a long solenoid drill. The drill is continuous and it is inserted in the ground by rotating in the same direction until the bottom end of the pile. While a part of the drilled foundation is extracted to the surface, the other part is displaced and pushed to the pile walls in the ground

After drilling to the desired level, compressed concrete is pumped inside the well from the hole at the center of the special CFA drill while pulling out. After the drilled are is filled with concrete up to the platform surface, the prearranged reinforcing cage is placed inside the fresh concrete.

CFA pile method is preferred when fast production is possible in small diameters and lengths on suitable ground conditions.