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Article Dans Une Revue Rock Mechanics and Rock Engineering Année : 2017

Dilatancy Criteria for Salt Cavern Design: A Comparison Between Stress- and Strain-Based Approaches

M. Tijani
  • Fonction : Auteur
Laura Blanco Martín
T. You
  • Fonction : Auteur

Résumé

This paper presents a new approach for salt cavern design, based on the use of the onset of dilatancy as a design threshold. In the proposed approach, a rheological model that includes dilatancy at the constitutive level is developed, and a strain-based dilatancy criterion is defined. As compared to classical design methods that consist in simulating cavern behavior through creep laws (fitted on long-term tests) and then using a criterion (derived from short-terms tests or experience) to determine the stability of the excavation, the proposed approach is consistent both with short- and long-term conditions. The new strain-based dilatancy criterion is compared to a stress-based dilatancy criterion through numerical simulations of salt caverns under cyclic loading conditions. The dilatancy zones predicted by the strain-based criterion are larger than the ones predicted by the stress-based criteria, which is conservative yet constructive for design purposes.

Dates et versions

hal-01636914 , version 1 (17-11-2017)

Identifiants

Citer

P. Labaune, A. Rouabhi, M. Tijani, Laura Blanco Martín, T. You. Dilatancy Criteria for Salt Cavern Design: A Comparison Between Stress- and Strain-Based Approaches. Rock Mechanics and Rock Engineering, 2017, ⟨10.1007/s00603-017-1338-4⟩. ⟨hal-01636914⟩
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