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Modelling the Mechanical Behaviour of Callovo-Oxfordian Argillite. Formulation and Application

  • A. GensEmail author
  • M. Mánica
  • J. Vaunat
  • D. F. Ruiz
Conference paper
Part of the Springer Series in Geomechanics and Geoengineering book series (SSGG)

Abstract

The paper presents a constitutive model for argillaceous rocks, developed within the framework of elastoplasticity, that includes a number of features that are relevant for a satisfactory description of their hydromechanical behaviour: anisotropy of strength and stiffness, nonlinear behaviour and occurrence of plastic strains prior to peak strength, significant softening after peak, time-dependent creep deformations and permeability increase due to damage. Both saturated and unsaturated conditions are envisaged. The constitutive model is then applied to the simulation of triaxial and creep tests on Callovo-Oxfordian (COx) claystone and to the analysis of the excavation of a drift in the Meuse/Haute-Marne Underground Research Laboratory. The pattern of observed pore water pressures and convergences during excavation are generally satisfactorily reproduced. The effect of incorporating creep is also demonstrated.

Keywords

Pore Water Pressure Triaxial Test Excess Pore Water Pressure Viscoplastic Strain Instantaneous Response 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The financial and technical assistance of ANDRA to the work presented is gratefully acknowledged. The first author has been supported by a Conacyt scholarship (Reg. No. 270190).

References

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Division of Geotechnical Engineering and Geosciences, Department of Civil and Environmental EngineeringUniversitat Politècnica de Catalunya, Barcelona TechBarcelonaSpain

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