| 摘要 |
<p>PURPOSE: To make it possible to move a leveling off pig without dropping this pig into an expanded diameter part over the entire transfer length of the pipe within a resin plug so that the subsequent lining is adequately executed by filling the recess of the reduced diameter part with a preceding resin in the case where the expanded diameter part exists in a pipeline line. CONSTITUTION: The leveling off pig 3 is arranged in such a manner that the pig 3 arrives at the top side of the resin plug in the position where the resin transfer is completed and thereafter, a liquid feed pump 10 is operated to inject the resin A from an above-the-ground aperture 14 into a supply pipe 7 by the liquid pressure. Next, a liquid resin transfer pig 4, a liquid absorbent material 5 and a liquid shielding pig 6 are introduced by the same liquid pressure into the supply pipe 7 and thereafter, the liquid feed pump 10 is operated to suck and pressurize the liquid B in a liquid tank 9 and to inject the liquid into the supply pipe 7, by which the resin A is transferred to a branching position 2. At this time, the resin A preceding to the leveling off pig 3 fills the recess of the expanded diameter part 12 if there is the expanded diameter part 12 on the pipeline during the transfer of the resin and, therefore, the incident that the pigs 3, 4, 6 fall into the recess and are unable to pass this part is prevented.</p> |
