Semielliptical-shaped sewer linings under installation conditions

This paper describes the results of a numerical parametric study on the structural response of closely packed semielliptical-shaped sewer linings. The effects of various restraint conditions which simulate different temporary support systems that may be used by the contractors during installation of the lining, and of different loading configurations which may arise at different stages of grouting the annulus gap between the lining and the sewer, have been thoroughly investigated. Comprehensive design curves, based on the allowable stress-limit, deflection-limit and (approximate) buckling criteria, are presented, covering the feasible range of geometric, material and loading parameters.