Soil freezing

One unique method for temporary stabilization and sealing of the subsoil: soil freezing. With this method, pore water in the soil is frozen into ice by circulating liquid nitrogen or a saline solution. After it has been stabilized, the subsoil serves as the basis for the construction of load-bearing and impermeable structures – among others for tunnel construction. We would be happy to assist you with our specialist knowledge in the area of soil freezing.

Brine freezing

The brine used is a nearly 30 % solution of calcium chloride in water. It circulates at a temperature of approx. -30 °C to -38 °C in low-carbon steel pipes, which form a closed circuit with the freezing system. Under normal conditions, freezing a soil body takes around 20 to 30 days.

Nitrogen freezing

Liquid nitrogen is stored in isolated tanks at slight excess pressure and a temperature of -196 °C. The liquid nitrogen circulates through copper or stainless steel pipes and is converted into gas. Under normal conditions, freezing a soil body takes around five to eight days.

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