| 摘要 |
<p>A method for removing frost from a selected area of the ground in accordance with one aspect of the invention involves positioning a plurality of hollow pipes over the area to be thawed, each pipe having an exhaust end and an inlet end. These pipes and the immediately adjacent ground areas, save for the inlet and exhaust ends of the pipes, are then covered with a bed of sand, gravel, or like filler material to a selected depth to provide a heat insulating and heat sink effect. Following this, burning gases are directed for a selected period of time along the length of each such pipe from a plurality of burners, each burner being disposed at the inlet end of a respective one of the pipes. The heated gases are allowed to travel along the length of the pipe and to escape from their exhaust ends whereby to effect heating of and thawing of the selected ground area.</p> |
