Academic Journal
Numerical modelling and in-situ experiment for self-sealing of the induced fracture network of drift into the Callovo-Oxfordian claystone during a hydration process
| العنوان: | Numerical modelling and in-situ experiment for self-sealing of the induced fracture network of drift into the Callovo-Oxfordian claystone during a hydration process |
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| المؤلفون: | Wang H., de La Vaissiere R., Vu M. -N., La Borderie C., Gallipoli D. |
| المساهمون: | Wang, H., de La Vaissiere, R., Vu, M. -N., La Borderie, C., Gallipoli, D. |
| بيانات النشر: | Elsevier Ltd. NLD |
| سنة النشر: | 2022 |
| المجموعة: | Università degli Studi di Genova: CINECA IRIS |
| مصطلحات موضوعية: | COx claystone, Damaged zone, In-situ experiment, Numerical modeling, Permeability, Self-sealing |
| الوصف: | The excavation damage zone surrounding an underground tunnel/gallery, and in particular its evolution, is being studied for the performance assessment of a radioactive waste underground repository. This paper focuses on numerical analysis of the self-sealing of the damaged zone based on an in-situ CDZ experiment for exploring the self-sealing of excavation damage zone during a hydration process. A plastic damage model is employed to describe the mechanical behaviour of Callovo-Oxfordian claystone (COx), and an added deformation model coupled with the standard Biot's model to simulate the significant deformation of COx claystone during the change of water content. Crack estimation and permeability evaluation of unsaturated fractured COx claystone are carried out through a post-processing method based on the fracture energy regularization and the cubic law, respectively. The validation of the proposed model is performed by numerical simulation of: (1) COx claystone swelling and triaxial compression tests, (2) self-sealing of fractured COx claystone samples during hydration process, (3) self-sealing of the damaged zone during a hydration process. Comparisons between the numerical and experimental results demonstrate the reliability of the proposed model to accurately describe the self-sealing of the fractured COx claystone, and the global water permeability reduction in hydration illustrates the accomplishment of the self-sealing of damaged zone. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | ELETTRONICO |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/WOS:000710564100001; volume:141; firstpage:104487; lastpage:104487; numberofpages:1; journal:COMPUTERS AND GEOTECHNICS; http://hdl.handle.net/11567/1074482; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85116856292 |
| DOI: | 10.1016/j.compgeo.2021.104487 |
| الاتاحة: | http://hdl.handle.net/11567/1074482 https://doi.org/10.1016/j.compgeo.2021.104487 |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.E8F4703E |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.compgeo.2021.104487 |
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