ABSTRACT
Most typically deep mixed columns are installed below road or railway embankments, but they can also be used below foundations of light structures. The columns will reduce the settlements and increase the overall stability. It is often found that this method is more economical than traditional methods, such as soil replacement and small diameter piles. Deep mixing can be applied to various types of soft soils from clays to organic soils and peat. The chemical and geotechnical properties of the soil influence the results of the deep mixing process and the choice of the binders. Binders commonly used include cement, lime, gypsum, blast furnace or pulverized fuel ash or any combinations found suitable for the site. Deep mixing can be divided into the dry method and the wet method. In the former the binder is introduced by compressed air, and in the latter as slurry form with moderate water pressure.
