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

Yannis K. Chaloulos, George D. Bouckovalas, Dimitris K Karamitros

Research output: Contribution to journalArticle (Academic Journal)peer-review

8 Citations (Scopus)
267 Downloads (Pure)

Abstract

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.
Original languageEnglish
Pages (from-to)52-63
Number of pages12
JournalComputers and Geotechnics
Volume83
Early online date5 Nov 2016
DOIs
Publication statusPublished - Mar 2017

Keywords

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

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