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CFA piling is vital in ground conditions where a formed hole in the ground will not hold open, for reinforcement on its own. In sand for example. Continuous Flight Auger Bored Piles are constructed with string of hollow stemmed augers. Once the Pile has been drilled to design depth the concrete is pumped through the centre of the augers to base of the pile. The augers are then pulled out, whilst the concreting continues to ground level, reinforcement, usually steel, is then introduced. During the extraction process the pile formation is monitored by an on-board computer system to ensure that that the pile is constructed correctly.