| 摘要 |
PURPOSE:To obtain the rotational reaction of pile by a method in which when a round pile is automatically clamped, penetrated, and pulled out, a check to turn the round pile is attached to a saddle clamping the existing pile to become a reaction anchor. CONSTITUTION:An oil-pressure plunger cylinder device 13 is contracted, a chuck casing 9 is raised, and a round pile 2 is grasped by a chuck jaw. The chuck 7 is then moved downwards while being turned along a mast 5, whereupon the pile is already clamped by a clamp 3 and a rotational reaction is obtained by the rotation of the chuck jaw. |
