Abstract
The stress-strain response of sensitive clays tested in a laboratory setting can be significantly affected by disturbance effects caused by sampling, transport, storage and specimen preparation. Soil models for finite element analyses are commonly calibrated using the results from laboratory tests and, consequently, calibrated model parameters are likely to be affected by sample disturbance. For sensitive clays subjected to constant volume shearing, the stress-strain behavior is dependent on the direction of loading and, due to build-up of shear induced pore pressure, effective stresses will reduce with increasing strain in the post-peak regime. According to previous studies, peak strengths, strains at failure and post-peak behavior of sensitive clays are all significantly influenced by sample quality. Therefore, the relative quality of model predictions generated using a sensitive clay finite element model can also be expected to be notably affected by sample disturbance. In this study, the impact of sample disturbance on the determination of model input parameters for advanced finite element modelling of sensitive clays is addressed and critically discussed. Two advanced soil models are used for this purpose: the total stress based NGI-ADPSoft model, which is able to predict the anisotropic strain-softening behavior of saturated sensitive clays, and the effective stress based S-CLAY1S model, which is characterized by an anisotropic yield surface and is able to simulate soil destructuration. The practical implications of a thoughtful selection of the input parameters are evaluated through FE stability analyses of a sensitive clay slope.
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Bjerrum L (1954) Geotechnical properties of Norwegian marine clays. Géotechnique 4(2):49–69
Bjerrum L (1973) Problems of soil mechanics and construction on soft clays. State-of-the-art report. In: Proceedings of the 8th ICSMFE, Moscow, 3, pp 111–159
Brinkgreve RBJ (1994) Geomaterial models and numerical analysis of softening. PhD thesis, TU Delft, Delft University of Technology
D’Ignazio M (2016) Undrained shear strength of Finnish clays for stability analyses of embankments. PhD thesis, Tampere University of Technology, Tampere
D’Ignazio M, Länsivaara T (2015) Shear bands in soft clays: strain-softening behavior in finite element method. Rakenteiden Mekaniikka J Struct Mech 48(1):83–98
D’Ignazio M, Länsivaara T, Jostad HP (2017) Failure in anisotropic sensitive clays: a finite element study of the Perniö failure test. Can Geotech J 10.1139/cgj-2015-0313
Di Buò B, D’Ignazio M, Selänpää J, Länsivaara T (2016) Preliminary results from a study aiming to improve ground investigation data. In: Proceedings of the 17th Nordic Geotechnical Meeting, Reykjavik, 25–28 May 2016, 1, pp 187–197
Grimstad G, Jostad HP, Andresen L (2010) Undrained capacity analyses of sensitive clays using the nonlocal strain approach. In: Proceedings of the 9th HSTAM international congress on mechanics, Vardoulakis mini-symposia, Limassol, Kypros, 12–14 July. pp 153–160
Grimstad G, Andresen L, Jostad HP (2012) NGI-ADP: anisotropic shear strength model for clay. Int J Numer Anal Methods Geomech 36(4):483–497
Hight DW, Leroueil S (2003) Characterisation of soils for engineering purposes. In: Proceedings of the international workshop characterisation and engineering properties of natural soils, Singapore, 2–4 December 2002, 1, pp 255–360
Jostad HP, Grimstad G (2011) Comparison of distribution functions for the nonlocal strain approach. In: Proceedings of the 2nd international symposium on computational Geomechanics, Cavtat-Dubrovnik, Croatia. pp 212–223
Karlsrud K, Hernandez-Martinez FG (2013) Strength and deformation properties of Norwegian clays from laboratory tests on high-quality block samples 1. Can Geotech J 50(12):1273–1293
Karstunen M, Yin ZY (2010) Modelling time-dependent behaviour of Murro test embankment. Géotechnique 60(10):735–749
Karstunen M, Krenn H, Wheeler SJ, Koskinen M, Zentar R (2005) Effect of anisotropy and destructuration on the behavior of Murro test embankment. Int J Geomech 5(2):87–97
Koskinen M, Karstunen M, Wheeler SJ (2002) Modelling destructuration and anisotropy of a natural soft clay. Proceedings of the 5th European conference on numerical methods in geotechnical engineering, Paris, pp 11–20
Ladd CC, DeGroot, DJ (2003) Recommended practice for soft ground site characterization: arthur Casagrande Lecture. Proceedings of the 12th Panamerican conference on soil mechanics and geotechnical engineering, 22–26 June 2003, 1, pp 1–57
Länsivaara TT (1999) A study of the mechanical behavior of soft clay. PhD thesis, Norwegian University of Science and Technology, Trondheim
Lefebvre G, Poulin C (1979) A new method of sampling in sensitive clay. Can Geotech J 16(1):226–233
Leoni M, Karstunen M, Vermeer P (2008) Anisotropic creep model for soft soils. Géotechnique 58(3):215–226
Lunne T, Berre T, Strandvik S (1997) Sample disturbance effects in soft low plastic Norwegian clay. Proceedings of the conference on recent developments in soil and pavement mechanics, Rio De Janeiro, 25–27 June 1997, pp 81–102
Lunne T, Berre T, Andersen KH, Strandvik S, Sjursen M (2006) Effects of sample disturbance and consolidation procedures on measured shear strength of soft marine Norwegian clays. Can Geotech J 43(7):726–750
Lunne T, Berre T, Andersen KH, Sjursen M, Mortensen N (2008) Effects of sample disturbance on consolidation behaviour of soft marine Norwegian clays. Proceedings of the third International Conference on Site Characterization ISC: geotechnical and geophysical site characterization, 3, pp 1471–1479
Mansikkamäki J (2015) Effective stress finite element stability analysis of an old railway embankment on soft clay. PhD thesis, Tampere University of Technology, Tampere
Mataić I (2016) On structure and rate dependence of Perniö clay. PhD Thesis, Aalto University, Helsinki
Plaxis BV (2012) User’s manual of PLAXIS, The Netherlands
Powell JJ, Lunne T (2005) Use of CPTU data in clays/fine grained soils. Studia Geotechnica et Mechanica 27(3–4):29–66
Thakur V, Oset F, Viklund M, Strand SA, Gjeskiv V, Christensen S, Fauskerud OA (2014). En omforent anbefaling for bruk av anisotropifaktorer i prosjektering i norske leirer. Report no. 1/2014. ISBN n. 978–82–410-0962-4
Wheeler SJ, Näätänen A, Karstunen M, Lojander M (2003) An anisotropic elastoplastic model for soft clays. Can Geotech J 40(2):403–418
Acknowledgements
The authors wish to express their gratitude to Dr. Siew Ann Tan from National University of Singapore for his valuable comments on the manuscript.
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D’Ignazio, M., Jostad, H.P., Länsivaara, T., Lehtonen, V., Mansikkamäki, J., Meehan, C. (2017). Effects of Sample Disturbance in the Determination of Soil Parameters for Advanced Finite Element Modelling of Sensitive Clays. In: Thakur, V., L'Heureux, JS., Locat, A. (eds) Landslides in Sensitive Clays. Advances in Natural and Technological Hazards Research, vol 46. Springer, Cham. https://doi.org/10.1007/978-3-319-56487-6_13
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