Rebuilding Buried Pipelines Without Diggingby Robert Dee Rice, Insituform of North America, Inc, Memphis, United States,
Abstract: Advances and refinements in trenchless reconstruction technologies now permit system rebuilding of gravity and low pressure pipelines without excavation. Through the use of cured-in-place and fold-insert-and-expand technologies, infiltration and leaking can be controlled more effectively while restoring full structural integrity to piping systems. These advancements include techniques for reconstructing laterals from inside mains to and beyond the property lines, structural rebuilding of existing manholes, and a means of introducing PVC, meeting the performance requirements of ASTM D-3034, into sewers without excavation and without leaving an annular space between old and new pipe walls.
Subject Headings: Buried pipes | Trenchless technology | Construction management | Excavation | Sewer pipes | Permits | Pressure pipes | Curing
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