Method and apparatus for thawing ground

Details Method and apparatus for thawing ground Method and apparatus for thawing ground

E - Fixed Constructions

02

D

E02D 3/11 (2006.01)

Patent

CA 2271442

A method and apparatus for thawing an area of frozen ground, especially to allow building of houses in the winter, includes drilling a series of generally vertical bores, spaced at 4 to 5 feet, into the frozen ground, and inserting a heating probe into each bore. The probes each comprise an outer tubular casing and an inner pipe extending within the casing, the pipe having an outlet near the lower end of the casing. The casing has a length of at least 4.5 feet, and an outside diameter of at least 2.5 inches, preferably at least 3.0 inches. The inner pipe is connected to a source of hot liquid and the casing is connected to an outlet for cool liquid, and the liquid is pumped to each inner pipe so that it flows through the casing of each heating probe, thereby thawing the ground surrounding the bores.

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