LINING METHOD FOR CONDUIT AND LINING MATERIAL FOR CONDUIT

摘要

In a bending portion of a conduit, a gap between a lining material and an inner surface of the conduit is minimized. A lining material 1 obtained by rolling a lining material sheet into a tubular form is installed in a conduit P with both ends of the lining material sheet 1 in its circumferential direction circumferentially overlapping each other. In this process, the lining material 1 is installed so that, in a bending portion P3 of the conduit P, an overlapping portion 1a where the both ends of the lining material sheet 1 overlapping each other faces toward an outer curvature side of the bending portion P3. Then, the diameter of the lining material 1 installed in the conduit P is expanded with the both ends of the lining material sheet 1 circumferentially slid on each other. This facilitates inflation of a portion of the lining material 1 which portion faces toward the outer curvature side in the bending portion P3, thereby to decrease the gap between the lining material 1 and an inner surface of the bending portion P3.