| 摘要 |
<p>PURPOSE:To improve the working efficiency of repairing work by applying mortar between a pair of pigs and pulling one pig in a traveling direction to pass a cutting position and carry out repair work by means of filling the cutting position with mortar. CONSTITUTION:By pulling and moving pigs 12, 13 in a traveling direction, a cutting position 10 made after cutting is filled with mortar 14. Moreover, by filling the piping line finished after hardening mortar 14 with resin 15, repairing process is carried out for improving bonding strength and water- tightness of mortar 14. In the repairing process mentioned above, the mortar 14 between the pigs 12, 13 pushed out outwards at the cutting position 10 to fill the cutting position and a stepoff portion. It is thus possible to provide high working efficiency and efficient repairing work.</p> |
