Numerical Investigation on Buried Pipelines Subjected to Permanent Ground Deformations Due to Shallow Slope Failure

Permanent ground deformations (PGDs) induced by slope failures cause catastrophic damage to buried pipelines. This paper presents a 2D plane-strain numerical analysis of the behavior 800 mm water transport pipeline in Aine-Tine (Mila, Algeria) subjected shallow PGD, as it could be triggered recent earthquake August 07th, 2020 (M= 4.9). The is carried out through application an incremental displacement simulate soil-pipeline interaction while focusing on effect (1) magnitude PGD and (2) rigidity structural response pipeline. elasticperfectly Mohr-Coulomb model was used soil elastic that steel pipe. Pipeline (i.e., translation ovalization) radial internal forces’ axial forces F୅, shear Fୗ bending moments M୆) results highlighted can exert additional loads pipelines are proportional PGD. It has been found well ring higher for rigid Moreover, indicated more effective than flexible ones far ovalization-serviceability limit state concerned. In effect, magnitudes 0.5, 1 2 m, ovalization values are, respectively, 23%, 21% 18% those calculated Through simplified linear simulation such presented this study, engineers planners guided foresee possible causes leaks mechanisms ruptures lead very often severe disruption pipelines’ normal operation. KEYWORDS: Soil-structure interaction, Slope failure, deformation, Pipelines, Radial forces, Ovalization