Soil Mix Columns / Deep Soil Mixing

Soil Mixing is a process of mixing a cementitious grout with in-situ soils.  The compressive strength of the soil mix mass can increase with increasing injection rate and cement content in the grout.  Soil mix columns can be individual or overlapping single, double, triple or quad mix paddles to depths up to approximately 100-ft.  Individual soil mix columns could be used to support structures.  Overlapping soil mix columns have been used to create a “plug” below an excavation to minimize vertical migration of groundwater into an excavation.  This is typically incorporated with secant wall or soil mix wall systems sometimes referred to as a bathtub.  Tiedowns could be installed through the plug to minimize the thickness and increase the factor of safety of uplift from hydrostatic pressure.