68th Canadian Geotechnical Conference and 7th Canadian Permafrost Conference

SOIL FAILURE MECHANISM FOR LATERAL AND UPWARD PIPELINE–SOIL INTERACTION ANALYSIS IN DENSE SAND

Session: Transportation and Linear Infrastructure I / Transports et infrastructures linéaires I

Kshama Roy, Memorial University of Newfoundland (Canada)
Bipul Hawlader, Memorial University of Newfoundland (Canada)
Shawn Kenny, Carleton University (Canada)

Finite element (FE) simulation of the response of buried pipelines due to lateral and upward relative displacements is presented in this paper. Analyses are performed using the Arbitrary Lagrangian-Eulerian (ALE) approach available in Abaqus/Explicit FE software adopting a modified Mohr-Coulomb model (MMC) where pre-peak hardening, post-peak softening, density and confining pressure dependent friction and dilation angles are considered. The calculated peak dimensionless force with the MMC model is consistent with the available design guidelines for shallow burial depths. However, at deep burial conditions FE simulations with the Mohr-Coulomb (MC) model give higher peak resistance than the simulations with MMC model. The simulations with the MMC model appeared to be consistent with the trend of model test results. The role of strain-softening on soil resistance and failure pattern is also critically examined.