Is That Liner Thick Enough

This paper compares different approaches to the design of liners for the rehabilitation of gravity pipes. The paper explores the impact that the various design input parameters have on the required strength of the liner and consequently the required thickness of the liner.

This paper:

• Explains the partially deteriorated and fully deteriorated design cases,
• Compares the different design methods specified in codes such as AS/NZS 2566.1 1998, ASTM F-1216-09, ASTM F1741-08 & ASTM F1947-10,
• Shows the impact that design input parameters have on the required thickness of the liner, and
• Provides recommendations as to how these factors should be estimated.