Article (Scientific journals)
Modelling chemo-hydro-mechanical behaviour of unsaturated clays: a feasibility study
Liu, Z.; Boukpeti, Nathalie; Li, Xikui et al.
2005In International Journal for Numerical and Analytical Methods in Geomechanics, 29 (9), p. 919-940
Peer Reviewed verified by ORBi
 

Files


Full Text
fulltext.pdf
Publisher postprint (499.76 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
plasticity; chemical softening; unsaturated soil; constitutive models; swelling clays; tunnelling
Abstract :
[en] Effective capabilities of combined chemo-elasto-plastic and unsaturated soil models to simulate chemohydro-mechanical (CHM) behaviour of clays are examined in numerical simulations through selected boundary value problems. The objective is to investigate the feasibility of approaching such complex material behaviour numerically by combining two existing models. The chemo-mechanical effects are described using the concept of chemical softening consisting of reduction of the pre-consolidation pressure proposed originally by Hueckel (Can. Geotech. J. 1992; 29:1071-1086; Int. J. Numer. Anal. Methods Geomech. 1997; 21:43-72). An additional chemical softening mechanism is considered, consisting in a decrease of cohesion with an increase in contaminant concentration. The influence of partial saturation on the constitutive behaviour is modelled following Barcelona basic model (BBM) formulation (Geotech. 1990; 40(3):405-430; Can. Geotech. J. 1992; 29:1013-1032). The equilibrium equations combined with the CHM constitutive relations, and the governing equations for flow of fluids and contaminant transport, are solved numerically using finite element. The emphasis is laid on understanding the role that the individual chemical effects such as chemo-elastic swelling, or chemo-plastic consolidation, or finally, chemical loss of cohesion have in the overall response of the soil mass. The numerical problems analysed concern the chemical effects in response to wetting of a clay specimen with an organic liquid in rigid wall consolidometer, during biaxial loading up to failure, and in response to fresh water influx during tunnel excavation in swelling clay. Copyright (c) 2005 John Wiley
Disciplines :
Civil engineering
Geological, petroleum & mining engineering
Author, co-author :
Liu, Z.;  Dalian University of Technology > The State Key Laboratory for Structural Analysis of Industrial Equipment
Boukpeti, Nathalie;  Université de Liège - ULiège ULg
Li, Xikui ;  Dalian University of Technology > The State Key Laboratory for Structural Analysis of Industrial Equipment
Collin, Frédéric  ;  Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur
Radu, Jean-Pol ;  Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur
Hueckel, Tomasz;  Duke University > Department of Civil and Environmental Engineering
Charlier, Robert ;  Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Géomécanique et Géologie de l'Ingénieur
Language :
English
Title :
Modelling chemo-hydro-mechanical behaviour of unsaturated clays: a feasibility study
Publication date :
2005
Journal title :
International Journal for Numerical and Analytical Methods in Geomechanics
ISSN :
0363-9061
eISSN :
1096-9853
Publisher :
John Wiley & Sons Ltd, Chichester, United Kingdom
Volume :
29
Issue :
9
Pages :
919-940
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Qualité et durabilité de la protection des nappes aquifères sous sites d’enfouissement technique avec barrières argileuses d’étanchéité
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 12 August 2008

Statistics


Number of views
173 (11 by ULiège)
Number of downloads
424 (6 by ULiège)

Scopus citations®
 
33
Scopus citations®
without self-citations
28
OpenCitations
 
28

Bibliography


Similar publications



Contact ORBi