SFA piles are constructed using a sectional hollow stemmed auger. Soil travels up the flights to ground level where it is removed by an auger cleaner. Concrete or grout is pumped through the auger's hollow stem as it is withdrawn, and sections removed, before reinforcement is inserted. Installation is monitored and controlled using on-board instrumentation to ensure quality standards are maintained.
Van Elle can install SFA piles of up to 900mm diameter and 30m deep, using its specialist low headroom Hütte, Klemm and Soilmec rigs