CFA

Concepts and Characteristic

The continuous flight auger bored piles belong to the category of bored piles with partial soil removal. Drilling is performed by means of a hollow, continuous auger.
This technique allows the production of piles with diameters varying from 300 to 1000 mm, for a maximum depth of 30 meters.

Procedure

A hollow auger is inserted into the ground once the necessary depth has been worked out, and then concrete is pumped down the hollow stem. At the same time, the hollow auger is withdrawn and in order to reinforce the piling, a reinforced cage is used. It is possible to monitor the entire installation process of the piles. A flow meter provides accurate data that is then recorded and can be analyzed. Information that is collected includes penetration/uplift per revolution, auger depth and injection of pressure at the head of the auger.

Applications

One of the benefits of CFA piles is that there is no casing involved and so there is minimal disruption associated with using them. They also help to keep vibrations to a minimum and can be used on large projects, making them a good piling solution for a range of situations.
CFA piles are a type of piling that is especially good for use on building sites where there is a need to keep noise to a minimum.

Various pictures of several CFA projects successfully completed over the years.

---