CFA (Continuous Flight Auger) piles are a highly efficient and widely used solution for deep foundations, particularly suited to urban environments and sensitive areas. This technology is based on continuous drilling performed with a hollow-stem auger, allowing pile installation without the need for temporary casing or stabilising slurry in most soil conditions.
The pile is constructed by drilling to the design depth with a continuous auger, then pumping concrete through the hollow stem while the auger is steadily extracted. Reinforcement is inserted into the fresh concrete immediately after casting.
Depending on geological conditions and structural requirements, CFA piles can be executed:
- In dry soil conditions
- In soft cohesive soils
- In loose granular soils (with proper control)
- With or without reinforcement cages or central bars
CFA technology ensures fast production rates, reduced noise and vibration, and limited environmental impact, making it suitable for residential, commercial and infrastructure projects.
