| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for burying heat exchange pipe of underground heat, and a propeller for burying capable of efficiently lowering a heat exchange pipe even when there is an obstacle such as a lump of mud in a pile hole.SOLUTION: A pile hole 42 is dug from the ground 41 and an existing pile 43 made of concrete having a hollow part 44 is buried in the pit hole 42 (a). The heat exchange pipe 1 which has a weight member 20 and a propeller 10 attached to the lower edge part thereof is inserted to the hollow part 44 of the existing pile 43 (b), (c). When there is the obstacle such as a lump of mud in the way of lowering, high-pressure water is supplied to a supply pipe 13 from the ground 41, and high-pressure water is sprayed to the upper side from injection ports 12, 12 of the propeller 10 (d) and is lowered to the bottom part of the existing pile 43 (e). The injection of the propeller 10 is stopped, the heat exchange pipe 1 is retained on the ground 41 and only the propeller 10 is lifted up to the ground 41 (f). |
