Liebherr LRB 155 - Manual (Page 2)

2
Soil mixing
Description
Soil mixing is a method of soil improvement through
the addition of binding agents, which are added to the
ground as cement suspension in wet form. The binding
agent is injected through nozzles at the lower end of a
hollow drilling linkage.
When the mixing tool (a hollow drilling linkage with
blades or paddles at the lower end) is drilled into the
ground, the binding agent is added.
In doing so a partial mixture with the soil is obtained.
Once the final depth has been reached, the mixing tool
is extracted and additional binding agents are injected.
Due to the change in rotational direction and the
alternating up and down movements, a homogeneously
mixed soil column is produced.