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Auger Cast Piles (CFA) in Florida
Continuous flight auger piles (CFA) are cast-in-place piles, using a single continuous hollow-stem auger. Low vibration and controlled installation can make this method suitable for urban sites and variable ground conditions, subject to the project design.
Our technology and methods enable us to construct CFA piles with different capacities and depths.
You Should Know
- Provide structural support
- Provide earth retention, especially on site boundaries or close to adjacent buildings
- Prevent landslides or protect existing buildings and are often combined with other techniques such as ground anchors or soil nails
- Infrastructure projects such as tunneling, road or bridge construction as well as flood protection
CFA piles are constructed by rotating a hollow stem continuous flight auger into the soil to a designed depth. Concrete or grout is pumped through the hollow stem, maintaining static head pressure, to fill the cylindrical cavity created as the auger is slowly removed. The reinforcement cage is placed through the freshly placed concrete.
Typically, CFA piles are reinforced with a rigid twenty feet long cage as a minimum, but it’s possible to install much longer cages as and when required by the design or specification. If required, a specially developed vibrator unit can help accurately locate the reinforcement cages.
Typically, CFA piles are reinforced with a rigid twenty feet long cage as a minimum, but it’s possible to install much longer cages as and when required by the design or specification. If required, a specially developed vibrator unit can help accurately locate the reinforcement cages.
- Resists compressive, uplift, and lateral loads
- A cost efficient foundation solution
- Can be installed in most soil conditions such as sands, clays, silts, gravels and soft rock
- Pile depths and diameters follow the project design, ground conditions and agreed installation scope.
- Low noise level and no vibration so ideal in built-up areas with weak soil conditions and high levels of ground water
- Compared to bored piles, construction is very quick as temporary casings or support systems are not required
Close control of the installation process is essential to ensure the highest quality pile construction.
Project installation records can include pile identification, depth, auger rotation, penetration rate, placement pressure, withdrawal rate, material volume, reinforcement and relevant incidents. The required monitoring and records are established for the agreed scope.
Controls and acceptance requirements are coordinated with the project team.
Quality assurance is achieved through a range of non-destructive testing methods to evaluate both pile integrity and/or load-settlement performance. Selection of verification technique is project and application specific.
Project installation records can include pile identification, depth, auger rotation, penetration rate, placement pressure, withdrawal rate, material volume, reinforcement and relevant incidents. The required monitoring and records are established for the agreed scope.
Controls and acceptance requirements are coordinated with the project team.
Quality assurance is achieved through a range of non-destructive testing methods to evaluate both pile integrity and/or load-settlement performance. Selection of verification technique is project and application specific.
View Auger Cast Piles (CFA) details Technical sheet PDF
Send the site location, drawings, geotechnical report and target schedule to estimates@technopiling.com.
