Lining construction method control unit null of existing

摘要

PURPOSE:To control lining work securely by placing a wire material between the side edges of belt-formed bodies neighboring each other, forming a spiral pipe by a pipe manufacturing machine to engage the side edges of the belt- formed bodies with each other, and inserting and pushing forward the spiral pipe in an existing pipe and expanding its diameter. CONSTITUTION:A belt-formed wire material 30 is engaged between the side edges of belt-formed bodies 10 engaged each other to increase the resistance between the side edges of the belt-formed bodies 10, and a spiral pipe 10a is manufactured by a pipe manufacturing machine 20. And after a small diameter of spiral pipe 10a is inserted in an existing pipe 81, the belt-formed body 10 is fed to give propelling force to push forward the spiral pipe 10a to a removing tool 40. Then the belt-formed wire material 30 is removed from the side edges of the belt-formed bodies 10, and the diameter of the spiral pipe 10a is expanded while rotating the pipe 10a. Then, the spiral pipe 10a inserted in the existing pipe 81 is expanded gradually and abutted to the whole inner surface of the existing pipe 81. Consequently, a superannuated existing pipe 81 can be revived.