CONSTRUCTION METHOD OF HEAT TRANSFER PIPE USED IN UNDERGROUND HEAT EXCHANGE DEVICE

PROBLEM TO BE SOLVED: To provide a construction method of a heat transfer pipe used in an underground heat exchange device capable of applying necessary and sufficient winding force when winding the heat transfer pipe around an outer circumferential part of a winding fixture made of reinforcing bar cage or the like and further capable of keeping a separation interval of the heat transfer pipe evenly.SOLUTION: When a heat transfer pipe 20 is wound around an outer circumferential part of a winding fixture 10 while the winding fixture 10 is rotated, the heat transfer pipe 20 cylindrically wound is mounted on a rotatable mounting table 30. The rotation of the mounting table 30 is controlled and a tension is applied to the heat transfer pipe 20. While the heat transfer pipe 20 is wound around the winding fixture 10, the heat transfer pipe 20 is fastened to the winding fixture 10. A suspension position of a winding fixture 10 by means of a suspension device (crane 50) is lowered and the heat transfer pipe 20 is wound around the substantially all outer circumferential part of the winding fixture 10. 【課題】 鉄筋カゴ等からなる巻付治具の外周部に伝熱管を巻き付ける際に、必要十分な巻き付け力を付与することができ、さらに、伝熱管の離間間隔を均等に保つことが可能な地中熱交換装置に用いる伝熱管の施工方法を提供する。【解決手段】 巻付治具１０を回転させながら、巻付治具１０の外周部に伝熱管２０を巻き付ける際に、円筒状に巻回された伝熱管２０を、回転可能な載置台３０上に載置する。載置台３０の回転を制御して伝熱管２０に張力を付与する。伝熱管２０を巻付治具１０に巻き付けながら、伝熱管２０を巻付治具１０に固定する。吊り下げ装置（クレーン５０）による巻付治具１０の吊り下げ位置を下降させて、巻付治具１０の略全外周部に、伝熱管２０を巻き付ける。【選択図】図１