To efficiently and inexpensively construct ground heat exchange equipment using a civil engineering-construction pile.

Heat transfer pipes 2 for passing a heating medium L are juxtaposed in a plurality in the pile peripheral direction in a state of extending in the pile lengthwise direction on the outer peripheral surface of the pile 1. Belt tools 3 are installed in a state of being wound on the pile 1 in a state of sandwiching the heat transfer pipes 2 between the tools and the outer peripheral surface of the pile 1, and are dispersively arranged in a plurality in the pile lengthwise direction. The heat transfer pipes 2 are installed on the outer peripheral surface of the pile 1 by being fastened by these belt tools 3.