method for preventing wasserleckage in pipelines and rohrinnenbeschichtung to prevent wasserleckage.

摘要

A method for preventing the water leakage into and from a pipeline utilizes an injection material and a liner (10). The injection material have fluidity and hardenability. The liner comprises an elastically deformable sleeve (12) having an outer diameter smaller than the inner diameter of the pipe and a plurality of elastically deformable and successively circumferentially extending projection portions (18,20,22,24) formed at axial intervals on the circumferential surface of the sleeve, a sheet-like base (14) placed inside the sleeve in a radially expandable, wound cylindrical form, fixing means (26,28) for maintaining the base in a substantially cylindrical form when the base is radially expanded inside the sleeve, and check valve means (30,32,34,36) defined by the sleeve and the base when the base is radially expanded. The check valve means permits the injection material to flow from the inside of the base into the space between the projection portions in the axial direction.