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A study on the behaviour of the weathered crust in the Perniö failure test

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A study on the behaviour of the weathered crust in the Perniö failure test. / D'Ignazio, Marco; Di Buo, Bruno; Länsivaara, Tim .

Proceedings of the XVI ECSMGE 2015: 13-17 September 2015 - Edinburgh, Geotechnical Engineering for Infrastructure and Development. ICE Publishing, 2015. p. 3639-3644.

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Harvard

D'Ignazio, M, Di Buo, B & Länsivaara, T 2015, A study on the behaviour of the weathered crust in the Perniö failure test. in Proceedings of the XVI ECSMGE 2015: 13-17 September 2015 - Edinburgh, Geotechnical Engineering for Infrastructure and Development. ICE Publishing, pp. 3639-3644, European conference on soil mechanics and geotechnical engineering, 1/01/00.

APA

D'Ignazio, M., Di Buo, B., & Länsivaara, T. (2015). A study on the behaviour of the weathered crust in the Perniö failure test. In Proceedings of the XVI ECSMGE 2015: 13-17 September 2015 - Edinburgh, Geotechnical Engineering for Infrastructure and Development (pp. 3639-3644). ICE Publishing.

Vancouver

D'Ignazio M, Di Buo B, Länsivaara T. A study on the behaviour of the weathered crust in the Perniö failure test. In Proceedings of the XVI ECSMGE 2015: 13-17 September 2015 - Edinburgh, Geotechnical Engineering for Infrastructure and Development. ICE Publishing. 2015. p. 3639-3644

Author

D'Ignazio, Marco ; Di Buo, Bruno ; Länsivaara, Tim . / A study on the behaviour of the weathered crust in the Perniö failure test. Proceedings of the XVI ECSMGE 2015: 13-17 September 2015 - Edinburgh, Geotechnical Engineering for Infrastructure and Development. ICE Publishing, 2015. pp. 3639-3644

Bibtex - Download

@inproceedings{30ec9d8d32aa42d9936a6717b3a5ff35,
title = "A study on the behaviour of the weathered crust in the Perni{\"o} failure test",
abstract = "A full-scale embankment failure test was done in Finland in 2009 in Perni{\"o}. The test was conducted in order to gather data to enhance stability calculation methods on soft soils in railway environment. A shallow embankment with loading structure was built on top of an existing fill layer over a stiff and overconsolidated clay crust followed by a soft sensitive clay layer and brought to failure in two days. The soft clay has been thoroughly studied and modeled over the last years based on high quality laboratory and field tests as well as measurements from the experiment. In this paper, the effect of the weathered clay crust on the stability of the embankment is studied. Ac-cording to La Rochelle (1974), the field vane tends to overestimate the undrained shear strength of the dry crust since measurements are affected by uncertainties due to soil structure and test conditions. For this reason a parametric study on stiffness and strength parameters of Perni{\"o} dry crust is done through comparison of experimental data with predictions from finite element method. In particular, three differ-ent models are used in this study: the isotropic Mohr-Coulomb and Hardening Soil model and the anisotropic NGI-ADP model. The anal-ysis is carried out with PLAXIS 2D. Finally, FE analysis of the Perni{\"o} failure test is done using different soil models and the failure load is predicted. Results are discussed in order to evaluate the most suitable model for the realistic prediction of undrained behaviour of Perni{\"o} weathered crust.",
author = "Marco D'Ignazio and {Di Buo}, Bruno and Tim L{\"a}nsivaara",
year = "2015",
language = "English",
isbn = "9780727760678",
pages = "3639--3644",
booktitle = "Proceedings of the XVI ECSMGE 2015",
publisher = "ICE Publishing",

}

RIS (suitable for import to EndNote) - Download

TY - GEN

T1 - A study on the behaviour of the weathered crust in the Perniö failure test

AU - D'Ignazio, Marco

AU - Di Buo, Bruno

AU - Länsivaara, Tim

PY - 2015

Y1 - 2015

N2 - A full-scale embankment failure test was done in Finland in 2009 in Perniö. The test was conducted in order to gather data to enhance stability calculation methods on soft soils in railway environment. A shallow embankment with loading structure was built on top of an existing fill layer over a stiff and overconsolidated clay crust followed by a soft sensitive clay layer and brought to failure in two days. The soft clay has been thoroughly studied and modeled over the last years based on high quality laboratory and field tests as well as measurements from the experiment. In this paper, the effect of the weathered clay crust on the stability of the embankment is studied. Ac-cording to La Rochelle (1974), the field vane tends to overestimate the undrained shear strength of the dry crust since measurements are affected by uncertainties due to soil structure and test conditions. For this reason a parametric study on stiffness and strength parameters of Perniö dry crust is done through comparison of experimental data with predictions from finite element method. In particular, three differ-ent models are used in this study: the isotropic Mohr-Coulomb and Hardening Soil model and the anisotropic NGI-ADP model. The anal-ysis is carried out with PLAXIS 2D. Finally, FE analysis of the Perniö failure test is done using different soil models and the failure load is predicted. Results are discussed in order to evaluate the most suitable model for the realistic prediction of undrained behaviour of Perniö weathered crust.

AB - A full-scale embankment failure test was done in Finland in 2009 in Perniö. The test was conducted in order to gather data to enhance stability calculation methods on soft soils in railway environment. A shallow embankment with loading structure was built on top of an existing fill layer over a stiff and overconsolidated clay crust followed by a soft sensitive clay layer and brought to failure in two days. The soft clay has been thoroughly studied and modeled over the last years based on high quality laboratory and field tests as well as measurements from the experiment. In this paper, the effect of the weathered clay crust on the stability of the embankment is studied. Ac-cording to La Rochelle (1974), the field vane tends to overestimate the undrained shear strength of the dry crust since measurements are affected by uncertainties due to soil structure and test conditions. For this reason a parametric study on stiffness and strength parameters of Perniö dry crust is done through comparison of experimental data with predictions from finite element method. In particular, three differ-ent models are used in this study: the isotropic Mohr-Coulomb and Hardening Soil model and the anisotropic NGI-ADP model. The anal-ysis is carried out with PLAXIS 2D. Finally, FE analysis of the Perniö failure test is done using different soil models and the failure load is predicted. Results are discussed in order to evaluate the most suitable model for the realistic prediction of undrained behaviour of Perniö weathered crust.

UR - https://www.researchgate.net/publication/265789150_A_study_on_the_behaviour_of_the_weathered_crust_in_the_Perni_failure_test

UR - http://www.icevirtuallibrary.com/doi/abs/10.1680/ecsmge.60678.vol7.572

M3 - Conference contribution

SN - 9780727760678

SP - 3639

EP - 3644

BT - Proceedings of the XVI ECSMGE 2015

PB - ICE Publishing

ER -