| 摘要 |
PROBLEM TO BE SOLVED: To suppress progression of compaction of sediment in a lower edge part of a pile when pressing-in the pile, while suppressing the amount of removed soil.SOLUTION: A pile rotary press-in machine (1) includes: pile rotary press-in means (2) for gripping a pipe-form pile 7 and pressing the pile into a ground while rotating; an auger screw 5 inserted into the pile for suppressing progression of compaction of sediment inside the pile due to rotary press-in of the pile, the auger screw having a diameter sufficiently smaller than a diameter of the pile; auger screw rotation means M connected to a top edge part of the auger screw, for rotating the auger screw; fixing means 3 for fixing the auger screw on the pile; and a casing 4 for the auger screw. Furthermore, a central axis of the auger screw deviates in a radial direction from a central axis of the pile. Progression of compression of sediment in the pile due to rotary press-in of the pile is suppressed by inserting the auger screw into the pile and fixing to the pile with the fixing means, having the pile gripped by the pile rotary press-in means, and rotating the auger screw with the auger screw rotation means while rotary pressing-in the pile by the pile rotary press-in means.SELECTED DRAWING: Figure 2 |
