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dc.contributor.authorZhao, H-Y
dc.contributor.authorJeng, D-S
dc.contributor.authorGuo, Z
dc.contributor.authorZhang, J-S
dc.description.abstractIn this paper, we presented an integrated numerical model for the wave-induced residual liquefaction around a buried offshore pipeline. In the present model, unlike previous investigations, two new features were added in the present model: (i) new definition of the source term for the residual pore pressure generations was proposed and extended from 1D to 2D; (ii) preconsolidation due to self-weight of the pipeline was considered. The present model was validated by comparing with the previous experimental data for the cases without a pipeline and with a buried pipeline. Based on the numerical model, first, we examined the effects of seabed, wave and pipeline characteristics on the pore pressure accumulations and residual liquefaction. The numerical results indicated a pipe with a deeper buried depth within the seabed with larger consolidation coefficient and relative density can reduce the risk of liquefaction around a pipeline. Second, we investigated the effects of a trench layer on the wave-induced seabed response. It is found that the geometry of the trench layer (thickness and width), as well as the backfill materials (permeability K and relative density Dr) have significant effect on the development of liquefaction zone around the buried pipeline. Furthermore, under certain conditions, partially backfill the trench layer up to one pipeline diameter is sufficient to protect the pipelines from the wave-induced liquefaction.
dc.publisherThe American Society of Mechanical Engineers
dc.publisher.placeUnited States
dc.relation.ispartofjournalJournal of Offshore Mechanics and Arctic Engineering
dc.subject.fieldofresearchCivil Geotechnical Engineering
dc.subject.fieldofresearchCivil Engineering
dc.subject.fieldofresearchMaritime Engineering
dc.subject.fieldofresearchMechanical Engineering
dc.subject.fieldofresearchResources Engineering and Extractive Metallurgy
dc.titleTwo-Dimensional Model for Pore Pressure Accumulations in the Vicinity of a Buried Pipeline
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Engineering
gro.rights.copyrightSelf-archiving of the author-manuscript version is not yet supported by this journal. Please refer to the journal link for access to the definitive, published version or contact the authors for more information.
gro.hasfulltextNo Full Text
gro.griffith.authorJeng, Dong-Sheng
gro.griffith.authorZhao, Hongyi

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