Calibration of Partial Factors for Basal Reinforced Piled Embankments

Conference paper (2015)
Department
Hydraulic Engineering (CEG) (TU Delft)
Copyright: of the Creative Commons Attribution Non-Commercial License.
Piled embankments Geosynthetics Partial factors Model error Code calibration Monte Carlo (MC) analyses
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Published Date

16-10-2015

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Source:

Geotechnical Risk and Safety V; 5th International Symposium on Geotechnical Safety and Risk; Rotterdam (The Netherlands), 13-16 Oct. 2015

Faculty

Civil Engineering and Geosciences

Department

Hydraulic Engineering

Abstract

In the Netherlands, the design guideline for basal reinforced piled embankments has been revised (CUR226:2015) adopting a new analytical design model (The Concentric Arches (CA) model, Van Eekelen et al., 2013; 2015). The CA model provides geosynthetic reinforcement (GR) strains which were compared with laboratory and in situ measurements (Van Eekelen et al., 2015). The corresponding discrepancies between the measured values and the values calculated with the new model have been assessed statistically in order to obtain model error statistics as suggested in Eurocode: basis of design (NEN, 2011). Monte Carlo (MC) simulations were carried out to obtain model, material and load factors using several reference cases, in order to calibrate the semi-probabilistic design approach for the revised Dutch Design guideline for Piled Embankments (CUR226, 2015). This paper discusses both the assessment of the model error as well as the calibration of the partial factors, including the lessons learnt.