| 摘要 |
PURPOSE:To drive a pile with good efficiency in a short time as well as to raise the efficiency of excavation without the needs for preboring by providing an excavator, a sideward vibration preventor, and a fluid discharger to the tip of a non-circular pile. CONSTITUTION:Plural vibration-preventing rings 4 are attached to the periphery of a non-circular pile 1 made of H-steel, etc., in which two sets of excavating blades 2 and 3 are welded between the lower end flange 12 cut into an acute angle and a rib 13. A hose 5 through which bentonite liquid, pressure water, etc., is passed is also attached over the whole length of the pile 1, a ring bit 41 is projectionally provided to the downside of the ring 4, and plural through holes 14 are drilled in then flange face 12. Excavation is made by the blades 2 and 3 and the bit 41 with good efficiency, and soil is discharged from the holes 14. At the same time, while preventing the degradation of the pit wall by bentonite liquid and also preventing sideward vibration by the ring 4, the pile 1 can be vertically erected.
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