Analytical modeling of a deep tunnel inside a poro-viscoplastic rock mass accounting for different stages of its life cycle |
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Affiliation: | 1. IBISC-EA 4526 Laboratory, University of Evry, 40 rue du Pelvoux, 91020 Evry, France;2. LIM laboratory, Polytechnic School of Tunisia, BP 743, La Marsa 2078, Tunisia;1. Institute for Frontier Materials, Deakin University, 3216, Australia;2. School of Engineering, Deakin University, 3216, Australia |
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Abstract: | An analytical approach of the viscoplastic behavior of a porous saturated rock mass surrounding a deep tunnel in different stages of a simplified life cycle is presented. The viscoplasticity is modeled by means of a simple (linear) Norton-Hoff’s law. Some numerical examples are performed to examine the consistency and relevance of the solutions. Parametric studies illustrate the influence of key parameters such as rock mass viscosity, Poisson’s ratio, rock mass permeability, lining emplacement, etc. This analytical approach constitutes a useful reference to facilitate more complex numerical simulation and making it possible to obtain practical estimations of the poromechanical behavior of underground structures. |
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Keywords: | Viscoplasticity Porous media Analytical Poromechanical Tunnel |
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