On characteristic values and the reliability-based assessment of dykes

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Abstract

A case study involving the assessment and re-design of an existing dyke, founded on a layered soil, has compared deterministic analysis based on 5-percentile property values and a reliability-based random finite element analysis consistent with the requirements of Eurocode 7. The results show that a consideration of the spatial nature of soil variability generally leads to higher computed factors of safety and, for those dyke sections requiring remedial action, to more economic designs. Back-figured characteristic values are shown to be considerably higher than the 5-percentile soil properties; hence, a reduction in over-conservatism is achieved.
Original languageEnglish
Pages (from-to)313-319
Number of pages7
JournalGeorisk
Volume13
Issue number4
DOIs
Publication statusPublished - 2019

Keywords

  • Characteristic values
  • dykes
  • Eurocode 7
  • slope reliability
  • spatial variability

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