CFA pile
CFA pile, also known as auger cast pile, is formed by drilling into the ground with a hollow stemmed continuous flight auger to the required depth or degree of resistance. A high slump concrete mix is then pumped down the stem of the auger. While the concrete is pumped, the auger is slowly withdrawn. The spoil on the flights is recovered by means of a hydraulic auger cleaner applied to the mast of the rig. A shaft of fluid concrete is formed to ground level.
