Numerical analysis of thermo-hydromechanical process related to deep geological radioactive repository
Jian-Fu Shao*, Zhan Yu, Zaobao Liu, Minh-Ngoc Vu, Gilles Armand
Deep Resources Engineering. 2024, 1(1): 100001. 
doi.org10.1016j.deepre.2024.100001.pdf
Abstract: This paper addresses numerical analysis of thermo-hydromechanical processes in the context of deep geological disposal of radioactive waste. The emphasis is put on modeling of damaged zones induced by excavation, pore pressure and temperature changes. The theoretical background of thermo-poroelasticity for saturated porous media is first recalled. The framework for modeling initiation and evolution of induced cracks is then presented by using a variational approach of phase-field method. A specific model with two crack phase fields and considering thermo-hydromechanical interaction is proposed. A particular attention is paid on the description of shear cracks. The proposed model is implemented in the standard finite element method. An example of application is finally presented on the analysis of thermo-hydromechanical responses and cracked zones evolution around a typical disposal repository in the context of French concept for high level waste disposal.
Highlights:
• A new phase-field model is developed for biphasic flow hydromechanical problem.
• Tensile and shear cracks are described by using two damage fields.
• Cracking processes due to Thermo-hydromechanical responses.
Keywords: Radioactive waste; Geological disposal; Thermo-hydromechanical coupling; Callovo-oxfordian claystone; Damage and cracking; Phase-field method
Cite: Shao, J.-F.; Yu, Z.; Liu, Z.B.; Vu, M.-N.; Armand, G., Numerical analysis of thermo-hydromechanical process related to deep geological radioactive repository. Deep Resources Engineering 2024,1 (1): 100001. https://doi.org/10.1016/j.deepre.2024.100001
Citations: ……
