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Soil displacement piles are bored cast in-situ concrete piles constructed by advancing a displacement boring tool into the ground with a rotary drilling rig using both torque and crowd force. The precondition for the successful deployment are modern rotary drilling rigs offering high levels of torque, downward thrust and retraction force, as well as a tall torsion-resistant drill mast. The technique is ideally suited for a wide spectrum of soil conditions ranging from sandy gravel, sand, silt and clay to soft organic soils, so long as the soil is displaceable. During drilling and pushing the displacement tool into the ground, the displaced volume of soil is pushed fully into the surrounding soil material by the displacement body. In the absence of soil being conveyed to the surface, this system is suited particularly well for operating in contaminated soils. The absence of any significant amounts of spoil also provides a greater freedom of manoeuvrability on site for the drilling rig. Drilling t
