CFA – Augercast Piles

A CFA pile, also known as an Auger Cast Pile is a widely used pile type that can achieve high axial, tension and lateral loads. A hollow stem auger is drilled to depth and once the tip elevation is reached, grout is pumped through the hollow stem while the auger is withdrawn. Once completely grouted a reinforcing cage or threadbar is installed to depth. The advantage of a CFA pile is cost efficiency due to high production rates.

DDP – Drilled Displacement Pile

A DDP pile, also known as Full Displacement Pile (FDP) is a widely used pile type that can achieve high axial, tension and lateral loads. The advantage of the DDP pile over a conventional CFA pile is the drill bit design. The drill bit has a bulb which is the same diameter of the pile being drilled. This bulb pushes the spoils laterally so they stay in the ground, improving the soil density and load capacity. This will provide higher loads than a traditional CFA pile. This also results in no significant spoils. A hollow stem auger is drilled to depth and once the tip elevation is reached, grout is pumped through the hollow stem while the auger is withdrawn. Once completely grouted a reinforcing cage or threadbar is installed to depth. The advantage of a DDP pile is higher capacity and cost efficiency due to high production rates.

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