Uncertainty reduction and sampling efficiency in slope designs using 3D conditional random fields

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Abstract

A method of combining 3D Kriging for geotechnical sampling schemes with an existing random field generator is presented and validated. Conditional random fields of soil heterogeneity are then linked with finite elements, within a Monte Carlo framework, to investigate optimum sampling locations and the cost-effective design of a slope. The results clearly demonstrate the potential of 3D conditional simulation in directing exploration programmes and designing cost-saving structures; that is, by reducing uncertainty and improving the confidence in a project's success. Moreover, for the problems analysed, an optimal sampling distance of half the horizontal scale of fluctuation was identified.

Original languageEnglish
Pages (from-to)159-172
Number of pages14
JournalComputers and Geotechnics
Volume79
DOIs
Publication statusPublished - 1 Oct 2016

Keywords

  • Conditional random fields
  • Kriging
  • Reliability
  • Sampling efficiency
  • Spatial variability
  • Uncertainty reduction

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