| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a novel installation pipe removal method capable of efficiently removing an installation pipe without open-cutting the ground. <P>SOLUTION: A thin and long member 12 is inserted into an installation pipe 3 by using an attachment 11 attached to a self-propelled working machine 10 placed on the ground, and after a cut-off plug 14 is installed inside the leading end of the installation pipe 3, the leading end part of the installation pipe 3 is cut off by a cutter device 15 attached at the leading end of the thin and long member 12 and the thin and long member 12 is pulled up with the cutter device 15 engaged with the leading end of the installation pipe 3 to pull out the installation pipe 3 to the ground. Backfill material 16 is used for back-filling at the same time when the installation pile 3 is removed, and the working machine 10 having finished the removal work is self-propelled to leave its working site, quickly returning it to an original state. <P>COPYRIGHT: (C)2012,JPO&INPIT |
