| 摘要 |
PURPOSE:To enable to very easily pull off an existing pile without the need for a force, by a method wherein a ground around the existing pile is excavated as water is implanted, and after the existing pile is brought into a separating state in mud, the existing pile and the casing are pulled off. CONSTITUTION:An excavating casing A in which an appropriate bit 3 is securely attached to a forward end of a casing 2 measuring a length matching a length l of an existing pile 1 and a diameter being slightly larger than that of a pile, is turned in a manner that it surrounds the pile head of the existing pile 1, and a ground around the total length of the existing pile 1 is excavated as water is continuously implanted into the bit 3. After this causes bringing of the existing pile 1 into a separate manner in mud in the excavating casing 2, and after the existing pile 1 is pulled off through the working of a pile driving equipment B, the excavating casing 2 is pulled off in a similar manner. This enables the easy pulling off of the existing pile irrespective of the size and the length thereof. |
