Hydromechanical simulation of argillaceous rocks : from laboratory tests to drift excavation
This study aims to evaluate the role of the pre-peak hardening regime in an elasto- viscoplastic model for argillaceous rocks, called the argillite model, use the model to replicate the hydromechanical response of argillaceous rocks observed in both laboratory and field tests, and investigate the in...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/441799 |
| Acceso en línea: | https://hdl.handle.net/2117/441799 https://dx.doi.org/10.1016/j.gete.2025.100714 |
| Access Level: | acceso abierto |
| Palabra clave: | Callovo-oxfordian argillaceous clays Strain localization Strain softening Anisotropy Viscoplasticity Creep Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de roques |
| Sumario: | This study aims to evaluate the role of the pre-peak hardening regime in an elasto- viscoplastic model for argillaceous rocks, called the argillite model, use the model to replicate the hydromechanical response of argillaceous rocks observed in both laboratory and field tests, and investigate the interactions between excavation supports and these geomaterials. Initially, the impacts of the pre-peak strain hardening regime on behavior of argillaceous rocks are investigated through modeling a series of theoretical biaxial tests. Afterward, the model is validated by simulating biaxial and triaxial tests conducted on Beaucaire marl and Callovo-Oxfordian (COx) clay samples, respectively. Additionally, the role of the hardening regime in capturing the dependence of strain at peak strength on confining pressure is demonstrated using the triaxial models. Next, the effects of the hardening regime on the hydromechanical response of argillaceous rocks to drift excavations are demonstrated by modeling GCS drift, excavated within the Meuse/Haute-Marne Underground Research Laboratory (MHM URL). Subsequently, the argillite model is employed to simulate three other supported and unsupported drifts, excavated within the MHM URL. Finally, the long-term failure pattern of the concrete lining is predicted. Results indicate that incorporating the hardening regime and support effects can significantly enhance the accuracy of the model predictions. |
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