Displacement- and Continuous flight auger drilling

In the SOB continuous flight auger drilling method, the auger is rotated into the ground to its final depth in a single operation. The concrete is conveyed to the concrete outlet at the lower end of the auger via the core barrel, thus producing the in-situ concrete pile as the auger is pulled. The loosening and conveying of soil takes place …

The SOB method has been an integral part of deep foundation for years; nevertheless, many of the augers available on the market cannot withstand the required torques and tensile forces. LEFFER SOB augers are designed for torques of up to 470 kNm and are available in 600 mm, 900 mm and 1200 mm diameters.  Pulling forces of up to 900 kN can …

The LEFFER full displacement auger types VV 400, VV 510 and VV 600 enable a cost-effective, environmentally friendly and safe production of in-situ concrete piles in a vibration-free drilling process. A bottom plate at the drill tip of the full displacement auger ensures that the ground to be worked is fully displaced and compacted at the same …