To prevent leakage of the fluid in a reinforcing object pipeline while realizing reinforcement of a pipeline simply, by providing with a fiber material made inner layer which consists of a cylindrical body capable of changing into a diameter expanding condition and a diameter contracting condition, and an organic material made outer layer having elasticity, and coating and forming the outer layer while holding the inner layer ion the diameter expanding condition.
A cylindrical body 2 for reinforcing a pipeline used when the inner surface of a pipe laid ion the underground is reinforced, is integratedly formed by carrying out thermal fusing after an inner layer 21 which consists of cylindrical braid is covered with the outer layer 22 of an organic elastic body. When a condition in which the cylindrical body 2 for reinforcing the pipeline is arranged in a reinforcement object pipeline is realized, a jig 7 for inserting a pig is installed on one end side P1 if the reinforcement object pipeline, and also a pair of pigs 6A, 6B are arranged on the jig 7. Lining agent s is filled between the pigs 6A, 6B they are integrated, air is transferred from one end side P1 toward the other side, and thereby, the lining agent s is impregnated into the inner layer 21, and it is hardened so as to form a fiber reinforcing plastic body.
DOI SHOJI
IWAO KEIZO
TSUKIMOTO FUMIO
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