| 摘要 |
PURPOSE:To easily remove existing piles by a method in which a casing tube covering an existing pile is vibrated to exude water in soft ground below the casing tube, and the casing tube is penetrated into the ground and then drawn out. CONSTITUTION:A casing tube 3 is lowered by a crane 4 until its lower end reaches the place surrounding the upper part of an existing pile 1 and a bar vibrator 5 is operated to apply a vibration to the casing tube 3. At the same time, a water supplier 11 is operated to exude water in the ground below the casing tube and the casting tube is penetrated to the lower part of the existing pile with the aid of vibration and exuded water. After the casing tube 3 is drawn out by a crane 4, the existing pile 1 is grasped by a grasper and pulled out, together with the soft ground cut by the casing tube. |
