| 摘要 |
<p>PURPOSE:To perform standard lining stably and surely, by inserting a preceding pig, followed by a substitutional pig and then a lining pig one after another, and by forming a lining layer of resin. CONSTITUTION:With a tracting lanyard 14, following a preceding pig 2 a substitutional pig 3 and then a lining pig 4 are inserted into an underground conduit line one after another. In the process in which resin C arranged in front of the substitutional pig 3 is pressurized with the preceding pig 2 and is moved in pushing, the resin C is filled up into the clearance of a conduit joint 13 existing in the section to be repaired. At the same time, taking out the air between the substitutional pig 3 and the lining pig 4 towards the back of the lining pig 4 and making it at about atmospheric pressure, the resin lining layer is formed inside the pipe surface in front and at the back of the conduit joint 13.</p> |
