| 摘要 |
<p>PURPOSE:To improve practicability and reliability of work when an underground cavity after pulling out and removing an underground buried pipe is filled up with a filler. CONSTITUTION:The tip of a flexible hose 3 for filling with a filler 1 is connected in an intercommunicated state with the base end of an underground buried pipe P. An underground cavity H is filled with a filler 1, charged through a flexible hose 3, from the tip of an underground buried pipe through an underground buried pipe P as the underground buried pipe P is pulled out in a state that at least a flow passage in the pipe through which the filler 1 is passable is left non-removed.</p> |
