Ground freezing

Artificial ground freezing is a construction technique used in circumstances where soil needs to be stabilized so it will not collapse next to excavations, or to prevent contaminants spilled into soil from being leached away. Artificial ground freezing was used for the first time in 1862 in Swansea, South Wales, UK by Siebe Gorman & Co. The system was applied for a coal mine shaft sinking.

Pipes are run through the soil to be frozen, and then refrigerants are run through the pipes, freezing the soil.

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