Fragility analysis of gray iron pipelines subjected to tunneling induced ground settlement

This paper focuses on the effect of tunneling-induced ground deformation on the response of jointed cast iron and ductile iron pipelines that (i) cross the settlement profile perpendicular to the t...

/pdf/jointed-pipeline-response-to-tunneling-induced-ground-26c3purbs7.pdf

Jointed pipeline response to tunneling-induced ground deformation1

Pipelines used for water and other services are very important lifelines in modern society. Commonly, these buried pipes are subjected to significant stresses due to external (traffic and earth) an...

https://tspace.library.utoronto.ca/bitstream/1807/72821/1/cgj-2015-0500.pdf

Equation to predict maximum pipe stress incorporating internal and external loadings on buried pipes

Large-diameter pipes, as well as heavy vehicles, have become increasingly prevalent, which imposes uncertainties on pipe design. This paper describes the procedure and results of a series of geotec...

Centrifuge modeling of large-diameter underground pipes subjected to heavy traffic loads

Pipeline water leakage has become a serious problem in many countries. It has been widely noted that most of the damage to the pipelines occurs in the joints where two pipes are connected to each o...

Centrifuge testing to simulate buried reinforced concrete pipe joints subjected to traffic loading

Re-assessment of resistance of cast iron pipes subjected to vertical loads and internal pressure

Bell split, in which a shard is separated from the bell end of a bell-spigot joint, is a predominant failure mode (in addition to longitudinal facture) that is observed in lead-caulked bell-spigot joints of large-diameter cast-iron pipes installed between 1850 and the early 1960s. This paper addresses three specific issues related to this type of failure of lead-caulked bell-spigot joints: (1) the extent to which cast-iron pipe joints can rotate without inducing stress in the bell; (2) the behavior of the bell–spigot lead-caulked joints; and (3) an estimate of the degree of settlement that two or more contiguous segments of jointed cast-iron pipe can tolerate before failure. The procedures described in this paper were motivated by the need to understand and explain the circumstances that lead to this failure mode in large-diameter cast-iron pipes. A mechanistic model accounts for lead material nonlinearity, wet and dry joint conditions encountered in water and gas pipelines, respectively, and exis...

Ahmed Abdel-Akher

Papers

Re-assessment of resistance of cast iron pipes subjected to vertical loads and internal pressure

Performance of Cast-Iron-Pipe Bell-Spigot Joints Subjected to Overburden Pressure and Ground Movement

Behavior and response of lead-caulked bell–spigot joints in cast iron water mains