A CFD approach for the flotation analysis of pipelines in liquefied sand (Une approche CFD pour l’étude de la flottation des pipelines dans les sables liquéfiés)

Federico Pisano, Massimiliano Cremonesi, F. Bortolotto, Gabriele Della Vecchia

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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Abstract

Submarine buried pipelines may often interact with shallow layers of loose sand that are particularly prone to liquefaction. When liquefaction is triggered by environmental loading and/or mechanical vibrations, the soil tends to behave as a viscous solid-fluid mixture and the pipeline to undergo either flotation or sinking. While a few indications can be found in the literature on the triggering condition for flotation/sinking, no conclusive methods are available to estimate the displacement of the pipe when liquefaction cannot be avoided. This preliminary work shows that combining in numerical simulations fluid and soil mechanics may successfully serve such a goal. The proposed modelling approach is compared to the results of small-scale pipe flotation tests, with emphasis on existing knowledge gaps and indications for future research on the subject.
Original languageEnglish
Title of host publicationProceedings of the XVII ECSMGE-2019
Subtitle of host publicationGeotechnical Engineering foundation of the future
EditorsHaraldur Sigursteinsson, Sigurður Erlingsson, Bjarni Bessason
PublisherIcelandic Geotechnical Society (IGS)
Pages1-8
Number of pages8
ISBN (Print)978-9935-9436-1-3
DOIs
Publication statusPublished - 2019
EventThe XVII European Conference on Soil Mechanics and Geotechnical Engineering: Geotechnical Engineering, foundation of the future - Reykjavik, Iceland
Duration: 1 Sep 20196 Sep 2019
https://www.ecsmge-2019.com/#

Conference

ConferenceThe XVII European Conference on Soil Mechanics and Geotechnical Engineering
Abbreviated titleECSMGE
CountryIceland
CityReykjavik
Period1/09/196/09/19
Internet address

Keywords

  • Consolidation
  • finite element modelling
  • liquefaction
  • offshore engineering
  • pipes & pipelines

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