1. Placement of the screw head. A lost closing nut tip, located under the screw prevents any penetration of water and / or soil during screwing-in. .
2. The especially designed auger, powered by a hydraulic rotary table with large torque capacity and static down thrust, displaces the soil laterally during the screwing-in phase.
3. Vibration-free screwing-in of the screw with its displacement body up to the requested design depth.
4. During the extraction phase of the auger, grout or concrete with a lower strength class is pumped under controlled pressure through the hollow, central tube into the borehole.
5. Completed rigid inclusion, illustrated with an enlarged head.