| 摘要 |
<p>PURPOSE:To prevent occurrence of troubles due to a useless pipe line even in the future by excavating vertical shafts in the underground buried pipe line and removing a pipe, inserting a conical type grinding machine in one of the vertical shafts and filling a filling material in the cavity of the original pipe line after having the grinding machine reach the other one of the vertical shaft crushing the pipe and lifting it up. CONSTITUTION:Vertical shafts 1A and 1B are excavated at two points at the desired position along a useless underground buried pipe line and the pipes exposed in the respective vertical shafts are removed. After a filling material 6 is injected in a cavity 5 of the pipe line, the vertical shafts 1A and 1B at the two points are backfilled. Consequently, even if the pipe line is curved, it is possible to extinguish it well. Additionally, the buried pipe is turned to be in the state of not being a rigid structural body, it is not an obstruction for construction.</p> |
