REGENERATIVE CONDUIT FOR EXISTING CONDUIT

摘要

PROBLEM TO BE SOLVED: To protect a seal material against external hydraulic pressure and members such as collars for connecting rings to each other which are required when the rings are made of precast concrete from sulfuric acid produced inside a sewer conduit. SOLUTION: In this regenerative pipe 2 formed by connecting the rings 5 of precast concrete to each other and disposed in the existing sewer conduit joint parts between the rings are formed in corrosion-resistant seal structure. The corrosion-resistant seal structure is formed by burying a corrosion-resistant seal member 10 having the insert part of a corrosion-resistant water cut-off plate 11 in the connection end faces of the rings 5, inserting the corrosion- resistant water cut-off plate 11 into the insert part, and installing the corrosion- resistant water cut-off plate 11 into the joint part.