| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a press-in pile method with an unsaturation function that is applicable to a narrow construction condition, environmentally friendly, and economical. <P>SOLUTION: In the press-in pile method of making a press-in pile 9 by forming a drilled part 3 by excavating the natural ground 1b by an excavation diameter expansion device 30 and an auger screw 20 up to a predetermined depth H of the ground 1 and removing the earth to a ground surface 1a, and tempering water-permeable granular material 8 and expanding the diameter by repeatedly extracting and driving in the excavation diameter expansion device 30 and auger screw 20 while throwing the water-permeable granular material 8 in the excavated part 3 when pulling out the excavation diameter expansion device 30 and auger screw 20 from the excavated part 3, the interior of the excavated part 3 is closed with an air leakage preventive valve 34 provided to the excavation diameter expansion device 30 and the natural ground 1b at a periphery of the excavated part 3 is made unsaturated by discharging air from an air discharge hole 36 provided to the excavation diameter expansion device 30 and injecting the air into the natural ground 1b when the press-in pile 9 is made. <P>COPYRIGHT: (C)2013,JPO&INPIT |
