| 摘要 |
PURPOSE:To easily pull out a pile, by a method wherein, after a pile is edge-cut through excavation of a casing auger having a screw blade, the pile is pulled off together with the auger through reversing of the auger as refiling with soil is effected from the outer side of the auger. CONSTITUTION:With a casing auger 3 being rotated, the auger is lowered by excavation to a level lower than that of the lower end of a pile 2. A wire rope 16 is connected to the pile 2, and the rope 16 is secured to a wire securing tool 13 of the auger 3. With the rotation of the auger 3 being reversed, earth 18, discharged resulting from edge cutting excavation, is guided to the interior of the auger 3 from the outside of the auger 3, and the earth 18 in the hole 17 is consolidated to be raised. Further, when the auger 3 is raised by reversing, the pile 2 connected to the rope 16 is raised together with the auger and pulled out from a ground. |
