Soil mixing is a technique that uses hollows augers to mix cement with soil to form a mixture with improved character in
terms of strength and permeability. It is often used as an alternative to trench or pit shoring using conventional methods
like beam and wooden lagging, soldier piles, sheet pile, or jet grouting walls. It is also used to consolidate contaminated
materials.
Soil mixing is vibration free, very low noise method of shoring ideal for use in granular soils where other construction
methods are not applicable due to the vibration and noise emissions involved.
It is also a very economical process when compared to other forms of shoring given the right soil conditions. Cost factors
in favor of soil mixing are high production rates, absence of aggregate such as sand or gravel in the grout mix, and the
fact that no spoils are generated fro removal.
The soil mixing process is often combined with conventional shoring techniques as in the installation of secant-pile-walls
where the primary piles are mixed and the secondary piles are cast-in-situ concrete bored piles or vice versa).
