Creep analysis of an earth embankment on soft soil deposit with and without PVD improvement

Mohammad Rezania; Meghdad Bagheri; Mohaddeseh Mousavi Nezhad; N  Sivasithamparam

doi:10.1016/j.geotexmem.2017.07.004

Creep analysis of an earth embankment on soft soil deposit with and without PVD improvement

Mohammad Rezania, Meghdad Bagheri, Mohaddeseh Mousavi Nezhad, N Sivasithamparam

School of Energy, Construction and Environment

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Abstract

In this paper, an anisotropic creep constitutive model, namely Creep-SCLAY1S is employed to study the installation effects of prefabricated vertical drains (PVDs) on the behavior of a full scale test embankment, namely Haarajoki embankment in Finland. The embankment was constructed on a natural soft soil with PVD installed to improve the drainage under one half of it. The Creep constitutive model used in this study, incorporates the effects of fabric anisotropy, structure and time within a critical state based framework. For comparison, the isotropic modified Cam clay (MCC) model and the rate-independent anisotropic S-CLAY1S model are also used for the analyses. The numerical predictions are compared with field measurements and the results indicate that the creep model provides an improved approximation of field settlements, and excess pore pressure build-up and dissipations. In addition, the application of two commonly used permeability matching techniques for two dimensional (2D) plane-strain analysis of the PVD problem is studied and the results are discussed highlighting their limitations and advantages.

Original language	English
Pages (from-to)	537-547
Number of pages	11
Journal	Geotextiles & Geomembranes
Volume	45
Issue number	5
Early online date	13 Jul 2017
DOIs	https://doi.org/10.1016/j.geotexmem.2017.07.004
Publication status	Published - Oct 2017

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Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Geotextiles & Geomembranes. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in[Geotextiles & Geomembranes, [45], [5], (2017)] DOI: 10.1016/j.geotexmem.2017.07.004

© 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

Geosynthetics
Embankment
PVD
Soft clay
Creep behavior
Advanced constitutive model

Cite this

Rezania, M., Bagheri, M., Mousavi Nezhad, M., & Sivasithamparam, N. (2017). Creep analysis of an earth embankment on soft soil deposit with and without PVD improvement. Geotextiles & Geomembranes, 45(5), 537-547. https://doi.org/10.1016/j.geotexmem.2017.07.004

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title = "Creep analysis of an earth embankment on soft soil deposit with and without PVD improvement",

abstract = "In this paper, an anisotropic creep constitutive model, namely Creep-SCLAY1S is employed to study the installation effects of prefabricated vertical drains (PVDs) on the behavior of a full scale test embankment, namely Haarajoki embankment in Finland. The embankment was constructed on a natural soft soil with PVD installed to improve the drainage under one half of it. The Creep constitutive model used in this study, incorporates the effects of fabric anisotropy, structure and time within a critical state based framework. For comparison, the isotropic modified Cam clay (MCC) model and the rate-independent anisotropic S-CLAY1S model are also used for the analyses. The numerical predictions are compared with field measurements and the results indicate that the creep model provides an improved approximation of field settlements, and excess pore pressure build-up and dissipations. In addition, the application of two commonly used permeability matching techniques for two dimensional (2D) plane-strain analysis of the PVD problem is studied and the results are discussed highlighting their limitations and advantages.",

keywords = "Geosynthetics, Embankment, PVD, Soft clay, Creep behavior, Advanced constitutive model",

author = "Mohammad Rezania and Meghdad Bagheri and {Mousavi Nezhad}, Mohaddeseh and N Sivasithamparam",

note = "NOTICE: this is the author’s version of a work that was accepted for publication in Geotextiles & Geomembranes. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in[Geotextiles & Geomembranes, [45], [5], (2017)] DOI: 10.1016/j.geotexmem.2017.07.004 {\circledC} 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/",

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AU - Rezania, Mohammad

AU - Bagheri, Meghdad

AU - Mousavi Nezhad, Mohaddeseh

AU - Sivasithamparam, N

N1 - NOTICE: this is the author’s version of a work that was accepted for publication in Geotextiles & Geomembranes. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in[Geotextiles & Geomembranes, [45], [5], (2017)] DOI: 10.1016/j.geotexmem.2017.07.004 © 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

PY - 2017/10

Y1 - 2017/10

N2 - In this paper, an anisotropic creep constitutive model, namely Creep-SCLAY1S is employed to study the installation effects of prefabricated vertical drains (PVDs) on the behavior of a full scale test embankment, namely Haarajoki embankment in Finland. The embankment was constructed on a natural soft soil with PVD installed to improve the drainage under one half of it. The Creep constitutive model used in this study, incorporates the effects of fabric anisotropy, structure and time within a critical state based framework. For comparison, the isotropic modified Cam clay (MCC) model and the rate-independent anisotropic S-CLAY1S model are also used for the analyses. The numerical predictions are compared with field measurements and the results indicate that the creep model provides an improved approximation of field settlements, and excess pore pressure build-up and dissipations. In addition, the application of two commonly used permeability matching techniques for two dimensional (2D) plane-strain analysis of the PVD problem is studied and the results are discussed highlighting their limitations and advantages.

AB - In this paper, an anisotropic creep constitutive model, namely Creep-SCLAY1S is employed to study the installation effects of prefabricated vertical drains (PVDs) on the behavior of a full scale test embankment, namely Haarajoki embankment in Finland. The embankment was constructed on a natural soft soil with PVD installed to improve the drainage under one half of it. The Creep constitutive model used in this study, incorporates the effects of fabric anisotropy, structure and time within a critical state based framework. For comparison, the isotropic modified Cam clay (MCC) model and the rate-independent anisotropic S-CLAY1S model are also used for the analyses. The numerical predictions are compared with field measurements and the results indicate that the creep model provides an improved approximation of field settlements, and excess pore pressure build-up and dissipations. In addition, the application of two commonly used permeability matching techniques for two dimensional (2D) plane-strain analysis of the PVD problem is studied and the results are discussed highlighting their limitations and advantages.

KW - Geosynthetics

KW - Embankment

KW - PVD

KW - Soft clay

KW - Creep behavior

KW - Advanced constitutive model

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DO - 10.1016/j.geotexmem.2017.07.004

M3 - Article

VL - 45

SP - 537

EP - 547

JO - Geotextiles and Geomembranes

JF - Geotextiles and Geomembranes

SN - 0266-1144

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10.1016/j.geotexmem.2017.07.004

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http://wrap.warwick.ac.uk/89990/