| 摘要 |
PROBLEM TO BE SOLVED: To easily insert a lining tube into a pipe with a low towing resistance by smoothing a protrusion and recess surface of an inner wall of the tube before inserting the tube into the pipe. SOLUTION: A tube inner wall smoothing step for smoothing a protruding and recess surface of an inner wall 4 of a tube with a synthetic resin 10 is provided before a main liming step of lining a tubular polyethylene resin film along the wall 4 of a pipe 3 by inserting a lining tube 1 made of a polyethylene resin into the pipe 3 of an existing pipe 2 to be lined. In this smoothing step, an uncured epoxy resin 11 is cast in the pipe 3. Then, a lining pig 12 is pushed to be advanced from one end side of the pipe 2 toward the other end side by an air back pressure. And, a film of an epoxy resin 11 is formed rear from the pit 12 of the wall 4, a recess of a protrusion and recess position 8c is filled with the resin 11. And then, the film is cured by aging change to smooth the overall wall 4. |
