Exploration of Loose-Fit and Tight-Fit Sliplining with Butt-Fusion Welded Thermoplastic Piping for Pipeline Rehabilitation

摘要

Trenchless rehabilitation of existing pipelines is a continually growing industry with many viable technologies available to the end user. Pipeline rehabilitation via sliplining methods is a well established means of trenchless construction that can sometimes be overlooked when evaluating rehabilitation options. Sliplining rehabilitation involves installing a new pipe inside an existing pipe, typically by means of pulling a fused thermoplastic material as the new replacement pipe. Sliplining can be classified into two categories: loose-fit and tight-fit. This paper will take a deeper look into both of these sliplining installation methods and identify when the unique characteristics of each method make them appropriate for consideration by the end user. Additionally, the paper will explore case studies from across North America, highlighting sliplining applications where fused thermoplastic piping materials have been effectively used. These applications will help to illustrate the viability of sliplining as a proven, efficient, and cost-effective means of trenchless pipeline rehabilitation.