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Tunnel excavation modeling with micromechanical approaches
Levasseur, Séverine; Collin, Frédéric; Charlier, Robert et al.
2011In IWBDG
Peer reviewed
 

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Abstract :
[en] A zone with significant irreversible deformations and significant changes in flow and transport properties is expected to be formed around underground excavation in the deep geological layers considered for the high level radioactive waste disposal. The present study concerns the modeling of this phenomena by a micromechanical damage model, based on a Mori-Tanaka homogenization on a cracked media. This anisotropic model is derived from Eshelby homogenized scheme, on which a coupling between damage and friction is taking into account on cracks. Compared to elastoplastic model on tunnel drilling modeling, micromechanical modeling seems very promising: both approaches provide similar EDZ sizes and shapes even if they do not have the same effects on perturbed mechanical behavior; micromechanical model also overcomes the elastoplastic one by a realistic characterization of crack processes.
Disciplines :
Civil engineering
Author, co-author :
Levasseur, Séverine ;  Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur
Collin, Frédéric  ;  Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur
Charlier, Robert ;  Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur
Kondo, Djimédo
Language :
English
Title :
Tunnel excavation modeling with micromechanical approaches
Publication date :
2011
Event name :
9th International Workshop on Bifurcation and Degradation in Geomaterials (IWBDG 2011)
Event place :
Porquerolles, France
Event date :
du 23 au 26 mai 2011
Audience :
International
Main work title :
IWBDG
Peer reviewed :
Peer reviewed
Available on ORBi :
since 01 June 2011

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