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Trench effects on lateral p-y relations for pipelines embedded in stiff soils and rocks

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)52-63
Number of pages12
JournalComputers and Geotechnics
Early online date5 Nov 2016
DateAccepted/In press - 24 Oct 2016
DateE-pub ahead of print - 5 Nov 2016
DatePublished (current) - Mar 2017


Existing relationships for lateral backfill pressures on pipelines assume that the trench is adequately wide to contain the failure surface. This condition is commonly violated in design and construction practice, putting at risk the pipeline safety. In this context, size and shape effects for trenches excavated in stiff soils and rocks, are numerically investigated, through experimentally-calibrated parametric analyses. It is shown that, for narrow trenches, ultimate pressures and yield displacements may increase up to an order of magnitude compared to “infinite-trench” values, while excavation of inclined walls reduces the above detrimental effects. Simplified relations are developed to aid pipeline design.

    Research areas

  • Buried pipelines, Trench, Dry sand, Lateral movement, Numerical analyses, Design

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    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Elsevier at . Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 235 KB, PDF document


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