Patent ID: 8151827

Claim:
A method for rehabilitating an existing pipe including a curved portion, comprising the steps of: helically winding a profile strip in an existing pipe for lining the existing pipe so as to interlock end portions in a width direction of adjacent windings of the profile strip with each other, thereby forming a rehabilitating pipe; and deforming the profile strip by heating process using a heating means such that the rehabilitating pipe conforms to a shape of the curved portion of the existing pipe, wherein the profile strip is made of a thermoplastic resin, wherein joint portions are provided at both the end portions in the width direction of the profiled strip, wherein an expanding/contracting portion is disposed between the joint portions, the expanding/contracting portion being capable of expanding or contracting in the width direction of the profile strip by the heating process, and wherein the heating process is performed with respect to the expanding/contracting portion.