| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method capable of securely and efficiently pulling out a foundation pile through simple and continuous operation irrelevantly to the outer diameter of the pile without having any special gripping structure for pile. <P>SOLUTION: A casing 7 is pressed in an outer circumference of a foundation pipe 2 buried in the ground by fluidizing the soil through injection of high-pressure water into an outer periphery and exciting operation. Sludge produced by the fluidization is discharged onto the ground from a through hole at an upper part of the casing 7. After vibration is stopped and the casing 7 is stopped at a predetermined position in the ground, the foundation pile 2 is held with sediment solidified by the fluidization. The casing 7 is pulled up onto the ground and extracted while the foundation pile 2 is held in this state. After the casing is pulled out onto the ground, the foundation pile 2 is discharged from the casing 7 by performing the exciting operation again. <P>COPYRIGHT: (C)2013,JPO&INPIT |
