REGENERATION METHOD OF EXISTING PIPE

摘要

PROBLEM TO BE SOLVED: To improve a reinforcement effect of an existing pipe, in a regeneration method of the existing pipe that constructs a regeneration pipe inside the existing pipe and injects back-filling material between the inner surface of the existing pipe and the regeneration pipe.SOLUTION: A regeneration method of an existing pipe containing concrete material includes a first step in which high-pressure water is injected to the inner surface of the existing pipe and the inner surface is chipped so as to remain only a portion having relatively high strength, a second step in which a regeneration pipe is constructed inside the existing pipe, and a third step in which back-filling material is injected between the inner surface of the existing pipe chipped in the first step and the regeneration pipe constructed in the second step.