| 主权项 |
1. A method for rehabilitating an existing pipe having a curved portion as viewed in cross-section orthogonal to the longitudinal direction of the existing pipe, comprising:
preparing a plurality of segments each comprising an inner surface plate, and side plates and end plates provided upright on a peripheral edge of the inner surface plate, the inner surface plate, the side plates, and the end plates being formed integrally from a plastic material; and linking the segments in a circumferential direction and in a pipe-length direction to assemble a rehabilitation pipe inside the existing pipe; wherein, for pipe rehabilitation at the curved portion of the existing pipe, a plurality of rectangular parallelepiped segments whose inner surface plate, side plates and end plates are all rectangular are used, and a spacer is interposed between the end plates of the rectangular parallelepiped segments when they are linked in the circumferential direction, and wherein the spacer has a first contact surface that comes into contact with the end plate of the rectangular parallelepiped segment and a second contact surface that comes into contact with the end plate of the rectangular parallelepiped segment on the side opposite the first contact surface, both the contact surfaces are inclined relative to each other such that both intersect at a predetermined angle of inclination. |
