Reduction of slope stability uncertainty based on hydraulic measurement via inverse analysis

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Abstract

The determination of slope stability for existing slopes is challenging, partly due to the spatial variability of soils. Reliability-based design can incorporate uncertainties and yield probabilities of slope failure. Field measurements can be utilised to constrain probabilistic analyses, thereby reducing uncertainties and generally reducing the calculated probabilities of failure. A method to utilise pore pressure measurements, to first reduce the spatial uncertainty of hydraulic conductivity, by using inverse analysis linked to the Ensemble Kalman Filter, is presented. Subsequently, the hydraulic conductivity has been utilised to constrain uncertainty in strength parameters, usually leading to an increase in the calculated slope reliability.

Original languageEnglish
Pages (from-to)223-240
Number of pages18
JournalGeorisk: assessment and management of risk for engineered systems and geohazards
Volume10
Issue number3
DOIs
Publication statusPublished - 2 Jul 2016

Keywords

  • Ensemble Kalman filter
  • reliability
  • slope stability
  • spatial variability
  • uncertainty reduction

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