GROUT INJECTION METHOD IN LINE REPAIRING TECHNIQUE

摘要

PURPOSE:To obtain a grout injection method ensuring the injection of a grout to a joint between a main pipe and a branch pipe with a good workability in a line repairing technique. CONSTITUTION:After a grouting liner 12 is impregnated with a grout 3, the liner 12 is reversed and inserted into a branch pipe 2 by a fluid pressure. This is inserted forward to a joint part between a main pipe 1 and the branch pipe 2. By raising the inner pressure of the liner 12 in this state, the grout 3 infiltrated in the liner 12 runs off. This is injected to the joint part between the main pipe 1 and the branch part 2. After the grout 3 is cured, the liner 12 is extracted from the branch pipe 2. Only by raising the inner pressure of the liner 12 reversed and inserted into the branch pipe 2, the grout 3 infiltrated in the liner 12 runs off the liner 12. This is injected to the joint part between the main pipe 1 and the branch pipe 2 with a good workability.