Stabilité et renforcement des fronts de taille des tunnels : une approche analytique en contraintes-déformations

Abstract : Construction process of tunnels involve more and more frequently a full face excavation, with high faces. Therefore engineers have to analyse the face stability and to design reinforcement by longitudinal fibreglass bolts. The current methods are mainly based on stability analysis, but they scarcely allow an evaluation of the deformations, except when using numerical modelling, in which the consideration of reinforcements induces very heavy models, much difficult to use in engineering practice. This paper describes a new stress-strain approach, based on a spherical principle, and allowing the calculation of face deformations, including when bolts reinforcement is used. We present the general principles of the methods and its validation, then various parametric analysis, and finally some cases of practical use: evaluation of a safety factor, design of face reinforcement, effect of the confining pressure on the face deformations when using a TBM.
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  • HAL Id : ineris-00961888, version 1
  • INERIS : PU-2003-097

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A. Guilloux, Jean-Bernard Kazmierczak, A. Kurdts, G. Regal. Stabilité et renforcement des fronts de taille des tunnels : une approche analytique en contraintes-déformations. Revue française de Géotechnique, 2004, pp.23-37. ⟨ineris-00961888⟩

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