CFA piles are constructed using a hollow stemmed auger. Soil travels up the flights to ground level where it is removed by an auger cleaner. Concrete is pumped through the auger's hollow stem as it is withdrawn, before reinforcement is inserted. Installation is monitored and controlled using on-board software.
Van Elle can install CFA piles of up to 1,200mm diameter and 35m deep, using its fleet of Llamada and Soilmec CFA rigs.