Model Tests of Buried Double-layered Pipe and Design of Flexible Liner

Abstract

Buried pipes play an important role for transporting water, sewage, electricity, gas, communication cables, and etc. Their construction has been rapidly progressed as the development of city so far. Nowadays in urban area, management and renewal of existing old buried pipes become more serious issue than new construction of pipes.
In this research, trenchless renewal method for an old existing pipe, putting inner flexible lining without ground excavation, was investigated. A series of laboratory model tests have been conducted to examine effects of backfill soil condition and host pipe deterioration on the behavior of flexible liner of double-layered pipe by trenchless renewal.[This abstract is not included in the PDF]