Parametric study of frost-induced bending moments in buried cast iron water pipes


Trickey S. A. , MOORE I. D. , Balkaya M.

TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, vol.51, pp.291-300, 2016 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 51
  • Publication Date: 2016
  • Doi Number: 10.1016/j.tust.2015.10.028
  • Title of Journal : TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
  • Page Numbers: pp.291-300
  • Keywords: Buried pipes, Fracture, Cast iron pipe, Frost effects, PIPELINE INTERACTION, HEAVE

Abstract

While the features of frost susceptible soils have been examined in various studies, the mechanisms by which volume changes due to ground freezing can influence cast iron water pipes buried below the frost line have not been explained, and the hypothesis that frost-induced ground deformations can induce ring fractures due to longitudinal bending of these pipes has not been proven. Therefore, a parametric study employing three dimensional finite element analysis is reported, where the soil-pipe interaction associated with a pipe crossing under an intersection of a major arterial road with a residential street are examined. The arterial road is modeled as having non-frost susceptible sub-base and the local street is represented as having a lower grade pavement with frost susceptible sub-base. One specific frost loading case featuring both isotropic pore water expansion and orthotropic ice lens formation is modeled.