As a front-line contractor in soil mixing, Schnabel recognizes that precise soil mixing is a fundamental part of crafting resilient earth-retention systems. When executed correctly, this process leads to a soilcrete mix that exhibits enhanced strength and diminished permeability.
Deep cement mixing, a method of soil mixing, finds its usage in constructing earth-retaining structures, particularly where a groundwater cutoff is necessary. In such cases, Schnabel normally employs a strategy of drilling overlapping soilcrete columns, an approach that results in a continuous groundwater cutoff wall.
Steel piles are generally integrated into the soilcrete while it’s wet, serving to strengthen the mixture. This heightened strength enables the treated ground to span the spaces between the piles. The soil mix wall’s reduced permeability enables an in-progress excavation to occur under relatively dry circumstances, leading to a limited reduction of the water table outside the excavation.
Beyond these applications, soil mixing is also used for creating an impermeable barrier beneath the ground where there’s no excavation, such as when reducing seepage through a dam or containing polluted groundwater. An additional application for deep cement mixing is the bolstering of foundation soils to enhance their strength and curtail the chances of liquefaction in an earthquake.