Method for rehabilitating existing pipes, and rehabilitation pipe segment used in said method

Abstract

Segments are coupled in the circumferential and lengthwise directions to assemble a rehabilitation pipe inside an existing pipe. Thereafter, a pipe-lining material impregnated with a liquid curable resin is inserted into the assembled rehabilitation pipe, and the curable resin is cured in a state in which the pipe-lining material is pressed against the internal circumferential surface of the rehabilitation pipe. This allows the internal circumferential surface of the rehabilitation pipe to be lined with the lining material. With such a configuration, a rehabilitation pipe composed of segments and a rehabilitation pipe composed of a pipe-lining material are constructed to provide a self-supporting pipe inside the existing pipe with dramatically improved strength that will incur little damage or breaking even when an earthquake occurs or another large impact is applied.

Dependencies are inferred from the claim text.