Stability analysis of existing slopes considering uncertainty

C. H. Juang, Yuin Yao Jhi, Der Her Lee

Research output: Contribution to journalArticlepeer-review

73 Citations (Scopus)


This paper describes a technique that can be used to handle soil parameter uncertainty in the stability analysis of slopes. The basic idea of this technique, called the vertex method, is to `discretize' uncertain soil parameters, expressed as fuzzy numbers, into a set of intervals. By replacing fuzzy numbers with intervals, the analysis with uncertain parameters reduces to a series of interval analyses that use only conventional mathematics. This approach, capable of handling parameter uncertainty, is deterministic, rather than probabilistic. PCSTABL, a popular PC-based computer program for slope stability analysis is used in conjunction with the vertex method to analyze slopes in the present study. A case study is presented to demonstrate this approach. The presented methodology is shown to be effective in handling parameter uncertainty in the stability analysis of slopes.

Original languageEnglish
Pages (from-to)111-122
Number of pages12
JournalEngineering Geology
Issue number2
Publication statusPublished - 1998 Mar 6

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Geology


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