Rehabilitation for inner tube of sewer and rehabilitation methods of sewer

摘要

PPROBLEM TO BE SOLVED: To provide a sewer rehabilitation method which allows the rehabilitation of a deteriorated sewer efficiently and in a very short period. PSOLUTION: The interior of the sewer 1 is cut off from water at an upstream of a manhole 2a connected thereto and a downstream of a manhole 2b which is arranged on a downstream of the manhole 2a, and a water leading pipe 3 for guiding sewage toward the downstream is arranged between water-cutoff portions. Then a plurality of divided rings 12 are circumferentially connected to each other to form a ring 20, and the rings 20 thus formed are sequentially connected to one another to assemble inner pipes 11. Further a cement-based filler is filled in a gap between the inner pipe 11 and the sewer 1 to fix the the pipe 11 and the the sewer 1. In this manner the sewer is rehabilitated. PCOPYRIGHT: (C)2005,JPO&NCIPI