Numerical Analysis of One-Dimensional Consolidation in Fine-Grained Soils

Abstract:

The purpose of this study is to discuss which constitutive law can describes at best the observed behavior of Silt and Gravelly Clay on the basis of experimental and analytical results. To find numerical solution for saturated soils in oedometer test Plaxis 2D the finite element software was used. In order to obtain the compressibility, excess pore pressure and degree of consolidation curves; two constitutive laws were used in this work: the Soft Soil Model ‘SSM’ and the Modified Cam Clay Model ‘MCC’. Predicted results were found in good agreement with measurements obtained from experimental test and analytical solutions. The Soft Soil is in good agreement with experimental results in the compressibility curve; however the Modified Cam Clay Model is the most appropriate if compared with the analytical solution.

• Periodical: Key Engineering Materials (Volume 857)
• Pages: 334-340
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.857.334
• Online since: August 2020
• Authors: Hana Agraine*, Meriem Fakhreddine Bouali, Abdelhamid Messameh
• Keywords: Behavior, Consolidation, Fine-Grained Soils, Numerical Analysis, PLaxis

References

[1] S.Yuan, H.Zhong, Consolidation analysis of non-homogeneous soil by the weak form quadrature element method. Comp. Geotech. 62 (2014) 1-10.

DOI: 10.1016/j.compgeo.2014.06.012

[2] M.A. Biot, Consolidation settlement under a rectangular load distribution, J. App. Phys. 12 (5): 426 (1941).

[3] M.A. Biot, General solution of the equation of elasticity and consolidation for a porous material, J. App. Phys. 23:91–95 (1956).

[4] J. Kim, A.P.S. Selvadurai, A note on the consolidation settlement of a rigid circular foundation on a poroelastic halfspace, Int. J. Numer. Anal. Meth. Geomech. (2016).

DOI: 10.1002/nag.2519

[5] Z.Y. Ai, Y.Z. Zhao, X. Song, et al.,Multi-dimensional consolidation analysis of transversely isotropic viscoelastic saturated soils, Engineering Geology. (2019).

DOI: 10.1016/j.enggeo.2019.02.022

[6] Y.C. Zhuang, K.H. Xie, B.H. Li, Nonlinear analysis of consolidation with variable compressibility and permeability, J. Zhejiang, Univ. sci 2005 6,4(3):181-187.

DOI: 10.1631/jzus.2005.a0181

[7] S.F. Zou, J.Z. Li, X.Y. Xie, A semi-analytical solution for one-dimensional elasto-viscoplastic consolidation of layered soft clay, Applied Clay Science. 153 (2018) 9–15.

DOI: 10.1016/j.clay.2017.11.042

[8] L.Arabet, Modélisation numérique du tassement et de la consolidation des sols sous l'oedomètre, Pan-Am CGS Geotechnical Conference (2011).

[9] F. Tounekti, M. Bouassida, M. Klai, Etude expérimentale en vue d'un modèle de comportement pour la vase de Tunis, revue française de géotechnique (2006).

DOI: 10.1051/geotech/2008122025

[10] M. Klai, M.Bouassida, S. Tabchouche, Numerical modelling of Tunis soft clay, Geotechnical Engineering Journal of the SEAGS & AGSSEA Vol. 46 No. 4, (2015) 87-95.

[11] L. S.Wong, S. Somanathan, Analytical and Numerical Modelling of One-Dimensional Consolidation of Stabilized Peat, Civil Engineering Journal Vol. 5, No. 2, February, (2019).

DOI: 10.28991/cej-2019-03091254

[12] R.B.J. Brinkgreve, PLAXIS, Version 8, Balkema, (2002).

[13] A. Verruijt, An Introduction to Soil Mechanics, Springer (2017).