Franki Piles are high-capacity, cast-in-place elements that can be used in a broad range of ground conditions. An enlarged base is formed in the founding strata to maximise pile capacity.

Common Uses

  • Provide structural support

Technical Details

Steel casing (up to 0.6m diameter) is vertically positioned at a planned pile location. The bottom 1.0m – 1.5m of the casing is filled with a very dry concrete mix. A long cylindrical steel internal hammer is then repeatedly dropped inside the casing on the dry mix. The mix locks into the bottom of the casing and the repeated blows of the drop weight advance the casing to the design depth. The casing is then restrained from further advancement and additional weight drops eject the dry mix out of the bottom of the casing. Further dry mix is added and driven from the casing until a design ‘resistance to displacement’ is achieved. Reinforcing steel and concrete are then placed in the casing and the casing is removed. The finished foundation element resists compressive and lateral loads, and has excellent uplift capacity.