To provide a method of rehabilitating an existing pipeline capable of reducing the man-hours and labor by eliminating manual transportation and enabling force-feed through a hose and stably placing mortar even when a height difference between the ground and the existing pipeline is large.
A slurry A is kneaded at ground level to produce a high-flow low-viscosity mortar. The kneaded slurry A is fed to a slurry A relay tank 42, and force-fed to a fixed volume dispensing section 22 by a slurry A relay pump 41. Simultaneously, a kneaded slurry B is fed to a slurry B relay tank 52, and force-fed to the slurry B relay tank 52 by a slurry B relay pump 51. The slurry A supplied to the fixed volume dispensing section 22 is then more uniformly kneaded there. By adding the slurry B, i.e. the additive, in the subsequent kneading section 23 and kneading the slurry A with the slurry B in a fixed proportion, a high-viscosity mortar is produced. The high-viscosity mortar is injected into the gap 12 between the existing pipeline 10 and a spiral wound pipe 13 through an injection nozzle 14a of a supply hose 14.
COPYRIGHT: (C)2007,JPO&INPIT
KURODA TAKEO
KUSE KEITA
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