| 摘要 |
PROBLEM TO BE SOLVED: To bury a pipe at a necessary depth by safely and efficiently connecting an existing pile and the pipe to each other for a system which circulates a fluid in the pipe so as to collect heat at a deep underground position onto the ground.SOLUTION: A lower-end pipe retainer 10 in a hollow channel shape which is fixed to a lower end part of an existing pile 1C is connected to pipes 30A, 30B, the ground is excavated from the surface of the ground 32 to form a pit hole 33, and the existing pile 1C is lowered into the pit hole 33 (a) (b). An upper-end pipe retainer 20 retains an upper end of the exiting pile 1A to which the pipe 30A is locked on the ground 32, and the existing pile 1C in which a pipe 30C is held is lowered from above (c). Then the pipe 30A and pipe 30C are connected together (d), the upper-end pipe retainer 20 in an X shape is folded and detached, and the existing pile 1C and existing pile 1C are connected to each other. The connected existing piles 1C, 1B are lowered and a necessary number of existing piles 1 are thus connected, and the pipes are buried in the pit hole 33 together with the existing piles. |
