The essence of the drilling technology is the mechanical mixing of the soil with cement mortar. Mixing of soils is carried out by means of blades on the drilling tool.
The cement slurry is fed through the hollow rods to the holes at the end of the drill string. Rotary drilling and the injection of the cement slurry takes place simultaneously. In contrast to jet cementation, the diameter of the soil-cement column is guaranteed by the size of the blades and is 500-800 mm.