On characteristic values for calculating factors of safety for dyke stability

Journal article (2020)

Authors

D. Varkey Geo-engineering - CEG
M.A. Hicks Geo-engineering - CEG
A.P. van den Eijnden Geo-engineering - CEG
P.J. Vardon Geo-engineering - CEG
Research Group
Geo-engineering (CEG) (TU Delft)
Copyright: © 2020 D. Varkey, M.A. Hicks, A.P. van den Eijnden, P.J. Vardon
DOI: https://doi.org/10.1680/jgele.19.00034
Statistical analysis Numerical modelling Slopes
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Published Date

2020

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Geoscience and Engineering

Research Group

Geo-engineering

Abstract

Various simplified approaches are used to calculate the characteristic values of shear strength properties, which have then been used in deterministic stability analyses of a dyke cross-section. The calculated factors of safety are compared with the 5-percentile ‘system response’ of the dyke cross-section, calculated using the more exhaustive random finite-element method (RFEM), which is consistent with the requirements of Eurocode 7. The simplified methods accounting for variance reduction due to averaging of property values mostly give factors of safety within 10% of the RFEM solution, whereas the factor of safety based on the 5-percentile material properties is significantly over-conservative.

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