Modélisation de la consolidation au dégel à grandes déformations
This thesis presents the development of an engineering method for the modelling of large strain nonlinear thaw consolidation. The work presented herein follows existing thaw consolidation theories and models. The foundations of one-dimensional thaw consolidation theory are therefore used. First, a n...
Main Author: | |
---|---|
Other Authors: | |
Format: | Thesis |
Language: | French |
Published: |
Université Laval
2019
|
Subjects: | |
Online Access: | https://hdl.handle.net/20.500.11794/37552 |
id |
fttriple:oai:gotriple.eu:http://hdl.handle.net/20.500.11794/37552 |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:http://hdl.handle.net/20.500.11794/37552 2023-05-15T16:55:45+02:00 Modélisation de la consolidation au dégel à grandes déformations Modelling of thawing consolidation with major deformations Dumais, Simon Konrad, Jean-Marie 2019-01-01 https://hdl.handle.net/20.500.11794/37552 fr fre Université Laval http://hdl.handle.net/20.500.11794/37552 other CorpusUL envir geo Thesis https://vocabularies.coar-repositories.org/resource_types/c_46ec/ 2019 fttriple https://doi.org/20.500.11794/37552 2023-01-22T17:14:56Z This thesis presents the development of an engineering method for the modelling of large strain nonlinear thaw consolidation. The work presented herein follows existing thaw consolidation theories and models. The foundations of one-dimensional thaw consolidation theory are therefore used. First, a numerical model for large strain nonlinear thaw consolidation is formulated by combining the Gibson large strain consolidation theory to heat transfer equations. The two components are coupled in a modelling domain formulated in Lagrangian coordinates that adapts to the soil deformation. This results in the introduction of a second moving boundary at the soil surface to model thaw consolidation in addition to the moving boundary at the thaw front. The model uses nonlinear σʹv – e – kv relationships to define the properties of thawed soils. A case study of the Inuvik experimental pipeline with the numerical model is presented. The case study demonstrates the use of the model for a practical problem and it is used to validate the model. The modelling results are compared to the results obtained with the small strain linear thaw consolidation theory and with the field data. The results obtained with the large strain nonlinear model for thaw settlement, the rate of thaw settlement and the excess pore pressures compare favourably with the field data. Second, a conceptual model for thaw consolidation of thawed fine-grained soils is proposed. The model is used to define the characteristics of the nonlinear σʹv – e – kv relationships used as input for the numerical modelling of thaw consolidation. The concept of the residual stress is generalized to ice rich soils by specifying that it is the effective stress within the soil element rather than the effective stress of the bulk soil. Then, empirical relationships are formulated to determine the characteristics of the σʹv – e – kv relationships as a function of the initial thawed void ratio and soil index properties. Cette thèse présente le développement d’une méthode ... Thesis Inuvik Unknown Inuvik ENVELOPE(-133.610,-133.610,68.341,68.341) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
French |
topic |
envir geo |
spellingShingle |
envir geo Dumais, Simon Modélisation de la consolidation au dégel à grandes déformations |
topic_facet |
envir geo |
description |
This thesis presents the development of an engineering method for the modelling of large strain nonlinear thaw consolidation. The work presented herein follows existing thaw consolidation theories and models. The foundations of one-dimensional thaw consolidation theory are therefore used. First, a numerical model for large strain nonlinear thaw consolidation is formulated by combining the Gibson large strain consolidation theory to heat transfer equations. The two components are coupled in a modelling domain formulated in Lagrangian coordinates that adapts to the soil deformation. This results in the introduction of a second moving boundary at the soil surface to model thaw consolidation in addition to the moving boundary at the thaw front. The model uses nonlinear σʹv – e – kv relationships to define the properties of thawed soils. A case study of the Inuvik experimental pipeline with the numerical model is presented. The case study demonstrates the use of the model for a practical problem and it is used to validate the model. The modelling results are compared to the results obtained with the small strain linear thaw consolidation theory and with the field data. The results obtained with the large strain nonlinear model for thaw settlement, the rate of thaw settlement and the excess pore pressures compare favourably with the field data. Second, a conceptual model for thaw consolidation of thawed fine-grained soils is proposed. The model is used to define the characteristics of the nonlinear σʹv – e – kv relationships used as input for the numerical modelling of thaw consolidation. The concept of the residual stress is generalized to ice rich soils by specifying that it is the effective stress within the soil element rather than the effective stress of the bulk soil. Then, empirical relationships are formulated to determine the characteristics of the σʹv – e – kv relationships as a function of the initial thawed void ratio and soil index properties. Cette thèse présente le développement d’une méthode ... |
author2 |
Konrad, Jean-Marie |
format |
Thesis |
author |
Dumais, Simon |
author_facet |
Dumais, Simon |
author_sort |
Dumais, Simon |
title |
Modélisation de la consolidation au dégel à grandes déformations |
title_short |
Modélisation de la consolidation au dégel à grandes déformations |
title_full |
Modélisation de la consolidation au dégel à grandes déformations |
title_fullStr |
Modélisation de la consolidation au dégel à grandes déformations |
title_full_unstemmed |
Modélisation de la consolidation au dégel à grandes déformations |
title_sort |
modélisation de la consolidation au dégel à grandes déformations |
publisher |
Université Laval |
publishDate |
2019 |
url |
https://hdl.handle.net/20.500.11794/37552 |
long_lat |
ENVELOPE(-133.610,-133.610,68.341,68.341) |
geographic |
Inuvik |
geographic_facet |
Inuvik |
genre |
Inuvik |
genre_facet |
Inuvik |
op_source |
CorpusUL |
op_relation |
http://hdl.handle.net/20.500.11794/37552 |
op_rights |
other |
op_doi |
https://doi.org/20.500.11794/37552 |
_version_ |
1766046801400430592 |