Australia’s Leading Design and Construction CFA Piling Company
CFA Piling
The CFA (Continuous Flight Auger) piling by Stratec is a technique used in construction and infrastructure industries for creating deep foundation piles economically. It involves the use of a continuous flight auger drill to excavate soil then injecting concrete or grout into the hole as the auger withdraws to form the pile. A reinforcing cage is then lifted into the pile for tensional strength.
CFA bored piles are extremely common in ground such as sand where the ground has little to no ability to support itself when a hole is drilled into it, but it has a solid layer under it that the pile can be socketed into.
The general process for a CFA Pile:
- A hollow-stemmed auger with a rotating drill bit at the end is screwed into the ground to the desired depth. The auger removes soil as it drills deeper into the ground.
- As the auger is withdrawn, concrete or grout is pumped through the hollow stem of the auger and into the hole. This creates a continuous column of concrete or grout, forming the pile of the specific diameter. Often there will be a specific CFA concrete mix that is engineered for the specific project.
- Reinforcement is inserted into the concrete or grout as the pile is constructed, depending on the design requirements.
CFA piling is often preferred for its efficiency and minimal disturbance to the surrounding soil during installation. It is commonly used in projects requiring deep foundation support, such as high-rise buildings, bridges, and other large structures.
Secant walls are created using a varied method of CFA Piling that involves using a soft and hard pile methodology.
Stratec have completed CFA piling projects across Queensland and Australia including Brisbane, Gold Coast, Sunshine Coast and the Fraser Burnett Region.
