Coupled modeling of Excavation Damaged Zone in Boom clay: Strain localization in rock and distribution of contact pressure on the gallery’s lining

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Coupled modeling of Excavation Damaged Zone in Boom clay: Strain localization in rock and distribution of contact pressure on the gallery’s lining. / Salehnia, F.; Collin, F.; Li, Xiang Ling; Dizier, Arnaud; Sillen, Xavier; Charlier, R.; Chen, Guangjing (Peer reviewer).

In: Computers and Geotechnics, Vol. 69, 09.2015, p. 396-410.

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@article{2cf20c6f85974c978f57f812adae3965,
title = "Coupled modeling of Excavation Damaged Zone in Boom clay: Strain localization in rock and distribution of contact pressure on the gallery{\textquoteright}s lining",
abstract = "The gallery excavation induced damaged zone (EDZ) is unavoidable. In the case of a geological disposal system for HLW, the change in the host rock properties in the EDZ may potentially be important with respect to the long-term evolution and the performance of that system. Predicting the extent of EDZ and the fractures{\textquoteright} network topology remains a challenge. This study aimed to simulate numerically the extension of this zone around the Connecting gallery (HADES URL, Mol, Belgium), in Boom clay through analyzing the evolution of strain localization in shear bands mode. To realistically model the involved phenomena, the concrete lining is considered on the gallery wall highlighting its impacts on the evolution of convergence and EDZ around the gallery. This paper focuses on analyzing the coupled hydro-mechanical behavior of Boom clay during and after excavation with respect to the evolution of localized shear bands around the gallery and the contact mechanism on the interface between the clay massive and the lining. To assess the reliability of the proposed approach, a discussion on some in-situ observations during the gallery{\textquoteright}s construction is performed based on which a good agreement is found between the in-situ evidence and simulated results.",
keywords = "Boom clay, connecting gallery, strain localization modeling, lining, contact pressure, pore water pressure evolution",
author = "F. Salehnia and F. Collin and Li, {Xiang Ling} and Arnaud Dizier and Xavier Sillen and R. Charlier and Guangjing Chen",
note = "Score = 10",
year = "2015",
month = sep,
doi = "10.1016/j.compgeo.2015.06.003",
language = "English",
volume = "69",
pages = "396--410",
journal = "Computers and Geotechnics",
issn = "0266-352X",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Coupled modeling of Excavation Damaged Zone in Boom clay: Strain localization in rock and distribution of contact pressure on the gallery’s lining

AU - Salehnia, F.

AU - Collin, F.

AU - Li, Xiang Ling

AU - Dizier, Arnaud

AU - Sillen, Xavier

AU - Charlier, R.

A2 - Chen, Guangjing

N1 - Score = 10

PY - 2015/9

Y1 - 2015/9

N2 - The gallery excavation induced damaged zone (EDZ) is unavoidable. In the case of a geological disposal system for HLW, the change in the host rock properties in the EDZ may potentially be important with respect to the long-term evolution and the performance of that system. Predicting the extent of EDZ and the fractures’ network topology remains a challenge. This study aimed to simulate numerically the extension of this zone around the Connecting gallery (HADES URL, Mol, Belgium), in Boom clay through analyzing the evolution of strain localization in shear bands mode. To realistically model the involved phenomena, the concrete lining is considered on the gallery wall highlighting its impacts on the evolution of convergence and EDZ around the gallery. This paper focuses on analyzing the coupled hydro-mechanical behavior of Boom clay during and after excavation with respect to the evolution of localized shear bands around the gallery and the contact mechanism on the interface between the clay massive and the lining. To assess the reliability of the proposed approach, a discussion on some in-situ observations during the gallery’s construction is performed based on which a good agreement is found between the in-situ evidence and simulated results.

AB - The gallery excavation induced damaged zone (EDZ) is unavoidable. In the case of a geological disposal system for HLW, the change in the host rock properties in the EDZ may potentially be important with respect to the long-term evolution and the performance of that system. Predicting the extent of EDZ and the fractures’ network topology remains a challenge. This study aimed to simulate numerically the extension of this zone around the Connecting gallery (HADES URL, Mol, Belgium), in Boom clay through analyzing the evolution of strain localization in shear bands mode. To realistically model the involved phenomena, the concrete lining is considered on the gallery wall highlighting its impacts on the evolution of convergence and EDZ around the gallery. This paper focuses on analyzing the coupled hydro-mechanical behavior of Boom clay during and after excavation with respect to the evolution of localized shear bands around the gallery and the contact mechanism on the interface between the clay massive and the lining. To assess the reliability of the proposed approach, a discussion on some in-situ observations during the gallery’s construction is performed based on which a good agreement is found between the in-situ evidence and simulated results.

KW - Boom clay

KW - connecting gallery

KW - strain localization modeling

KW - lining

KW - contact pressure

KW - pore water pressure evolution

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_139781

UR - http://knowledgecentre.sckcen.be/so2/bibref/12770

U2 - 10.1016/j.compgeo.2015.06.003

DO - 10.1016/j.compgeo.2015.06.003

M3 - Article

VL - 69

SP - 396

EP - 410

JO - Computers and Geotechnics

JF - Computers and Geotechnics

SN - 0266-352X

ER -

ID: 175821