Application of statistics to CPT-based parameter selection

Conference paper (2022)

Authors

H.J. Lengkeek Witteveen+Bos, Hydraulic Structures and Flood Risk - CEG
Sebastiaan N. Jonkman Hydraulic Structures and Flood Risk - CEG
M. Hauth Student
Research Group
Hydraulic Structures and Flood Risk (CEG) (TU Delft)
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Published Date

2022

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Hydraulic Engineering

Research Group

Hydraulic Structures and Flood Risk

Abstract

The derivation of representative values for geotechnical parameters accounts for the various sources of uncertainty which are addressed at different stages of the determination process. A comprehensive flow chart for the determination of constitutive model parameters from site tests is proposed. The authors first consider a straightforward methodology to quantify the inherent uncertainty of variables measured from a CPT. An automated framework is then applied to merge outcomes from several transformation functions into a single combined output. This result can be subsequently updated with expert judgment or with direct measurements from laboratory tests using a Bayesian approach. When applied to the friction angle, a reduction of the posterior updated representative standard deviation is observed.