| 摘要 |
PURPOSE:To prevent the occurrence of vibration by a method in which a spiral projected line is formed on the periphery of a round pile to be driven so that a rotation movement around the pile shaft is naturally generated as the pile penetrates into the ground, and after the penetration, a fixing part is attached to the head of the pile to prevent the natural rotation. CONSTITUTION:A pile 3 with a cap 4 is additionally connected through a connector 2 to the head of spiral form 1, having a spirally projected line 1' of great advancing angle. A wire rope 6 whose one end is fixed to the ground's surface is engaged with a pulley 5 and a pile 1 is penetrated by a penetrating winch 7. In this case, a pile-supporting cylinder 10 with female screw is held by a soil pressing board 9 on the ground's surface 8. The pile 1 penetrates slowly and naturally with rotation into the ground through one or multi-projected lines 1' without disturbing soil. After the driving, the head of the pile is fixed to prevent its rotation. The penetrating work can thus be performed without noise and vibration and great bearing force can be provided for the pile.
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