Continuous Flight Auger Piling

Continuous Flight Auger Piling

Our technology and methods enable us to construct CFA piles with higher load capacities and to greater depths than any of our competitors. With load bearing characteristics superior to conventional bored piles, CFA piling can be installed through unstable and saturated soils, where conventional bored piles would require the use of drilling  fluids and/or extensive and costly casing.
 
CFA is a method in which a pile is formed by drilling into the ground with a continuously flighted auger. Upon completion of drilling, concrete is injected under pressure through the hollow stem of the auger, and this pressure is maintained throughout the auger extraction process. On completion of concreting, a steel reinforcing cage is inserted into the super workable concrete.

To ensure pile quality and integrity, all of our rigs are fitted with onboard computers which monitor penetration rate, torque, extraction rate, concrete pressure and oversupply in real time.
Diameters from 400mm to 1200mm are available to depths in excess of 40 metres.

Rock socketing of CFA piling is also feasible in medium strength rock by using special cutting heads, thus enabling the installation of extremely high-load capacity piles.