On characteristic values and the reliability-based assessment of dykes

Journal article (2019)

Authors

M.A. Hicks Geo-engineering - CEG
D. Varkey Geo-engineering - CEG
A.P. van den Eijnden Geo-engineering - CEG
T. de Gast Geo-engineering - CEG
P.J. Vardon Geo-engineering - CEG
Research Group
Geo-engineering (CEG) (TU Delft)
Copyright: © 2019 M.A. Hicks, D. Varkey, A.P. van den Eijnden, T. de Gast, P.J. Vardon
DOI: https://doi.org/10.1080/17499518.2019.1652918
Spatial variability Eurocode 7 Dykes Characteristic values Slope reliability
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Published Date

2019

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Geoscience and Engineering

Research Group

Geo-engineering

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.