| 摘要 |
PURPOSE:To exactly make easier the drawing of a follower pile from its lower part by a method in which the ground around an existing follower pile is excavated by a casing whose tip excavating blade is wound with a wire, and the wire is clamped with the lower end of the follower pile and pulled up. CONSTITUTION:A casing 3 of a larger diameter than an existing follower pile is hung down along an excavating blade on its lower end, and a wire 5 is fitted circularly on the casing 3 and hung from a separated crane 6 through the periphery of the casing 3. The casing 3 is turned, and the surrounding ground of the existing follower pile 1 is excavated while jetting excavating mud water. The casing 3 is slightly pulled up, and the wire 5 is removed out of the casing 3 by its rigidity and under its own weight. The wire 5 is then pulled up and clamped with the lower end of the follower pile 1. The casing 3 is drawn out, and then the pile 1 is pulled up by the wire 5. |
