Yield Envelopes for Oblique Pipeline/Soil Interaction in Cohesive Soil using ALE Procedure

D. Seo, S. Kenny, B. Hawlader, R. Phillips

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Buried Structures & Subsurface Systems

ABSTRACT: This study examines the yield envelopes for axial-lateral oblique pipeline/soil interaction in cohesive soil with particular attention to the pipe oblique angle and the pipe burial depth ratio on the basis of LS-DYNA/Explicit ALE formulation. Based on this approach, the soil failure mechanisms were examined as a function of pipe oblique angle. This paper also presents a fact that the yield envelopes should be determined by considering soil failure mechanisms, which is varied with pipe oblique angle: (a) lateral resistance, (b) lateral-axial transition, and (c) axial resistance zones.

RÉSUMÉ: Cette étude examine les enveloppes de rendement des pipelines oblique axial-latérale de l'interaction sol / dans des sols cohérents avec une attention particulière à l'angle de tube oblique et le rapport profondeur du tuyau d'inhumation sur la base de LS-DYNA/Explicit ALE formulation. Sur la base de cette approche, les mécanismes de rupture du sol ont été examinés en fonction de l'angle de tube oblique. Cet article présente également un fait que les enveloppes de rendement devraient être déterminés en tenant compte des mécanismes de rupture du sol, qui est varié avec un angle de tube oblique: (a) la résistance latérale, (b) transition latérale-axial, et (c) zones résistance axiale.

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