Soil mixing methods

Overview of our soil mixing methods

CSM (Cutter Soil Mixing)

In contrast to established soil mixing methods where mixing tools rotate around a vertical axis, the CSM method is derived from trench cutter technology. The soil is loosened with cutting wheels and mixed with slurry to form a homogeneous soil-bentonite mortar. The method can be used to construct cut-off walls and retaining structures in various soil types, including hard soils.

SCM-DH single columns

The newly developed SCM-DH tool (single column mixing tool for double-head drilling systems) represents a significant enhancement of the single column mixing tool that has been proven in practical use and established worldwide for years now. The two mixing tool components move in reverse directions of rotation, achieving a particularly intensive mixing of the soil with the slurry. As a result, this tool is especially suited for the construction of soil mixing columns in cohesive as well as sandy soils.

SCM (Single-Column Mixing)

Like all mixing methods used at RTG, the single-column method SCM is a wet mixing process. In this process, a drill string with a mixing paddle is screwed into the soil by a rapidly rotating drill drive, while slurry is fed continuously into the soil. The method is principally used in loose, non-cohesive soils as a soil improvement measure.

MSM (Multi Shaft Mixing)

Multi Shaft Mixing (MSM) is an economically efficient mixing method in which mixing paddles arranged parallel to one another are turned into the soil by up to four independent rotary drives. In the process, cement slurry is continuously pumped through the hollow stem. This system is used for the construction of cut-off walls, for example in areas with contaminated soil, groundwater barriers in many construction applications, sealing and rehabilitation of flood dams and dikes, for excavation pits and other structural requirements as well as for soil improvement.

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Franz-Werner Gerressen
Head of Process Development