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An Elastoplastic Analysis of 3-D Ground Movements

  • Y. Riou
  • P. Chambon
Conference paper
Part of the International Centre for Mechanical Sciences book series (CISM, volume 397)

Abstract

This paper describes numerical modelling of the deformation of sand caused by the reduction of pressure at tunnel face. This study refers to a laboratory test carried out on a centrifuge with measurements of surface settlements and displacements in soil mass. A series of 3D finite element calculations using three elastoplastic stress-strain constitutive models (Mohr Coulomb, Vermeer and Nova models) is performed. The results of this analysis are compared with experimental findings. If numerical results show good conformity with displacements observed at tunnel face, we note some limitations of the physical modelling and the numerical calculation when achieved in a standard way. These limitations in the two approaches are due to simplifications inducing different deformation mechanisms and show that experimental tests and numerical modellings are highly connected and should be carried out simultaneously.

Keywords

Ground Movement Yield Surface Volumetric Strain Triaxial Test Stress Path 
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.

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References

  1. Chambon P. (1997) Souterrains et forage en site urbain., Rapport interne, GEO, Ecole Centrale de Nantes. Lab. de Génie Civil de Nantes-Saint Nazaire (LGCNSN) Google Scholar
  2. Mestat Ph. (1992) Sur quelques développements du module de résolution en comportement non linéaire (MCNL) — Progiciel CESAR- LCPC, Annales de l’ITBTP, n°509, décembre 1992 Google Scholar
  3. Nova R & D.M. Wood (1979). A constitutive model for sand in triaxial compression, Vol. 3, n°3, Int. Journal. for Numerical and analytical Methods in geomechan., pp 255–278. Google Scholar
  4. Riou Y., Nicolas Ch., Abdallah N. (1997), Modélisation numérique d’une section de tunnel en service: incidence du modèle de comportement, Mini symposium AFPC AFREM, GEO’97, Aussois Google Scholar
  5. Vermeer P.A. (1978) A double hardening model for sand, Geotechnique, 28, 1978, pp 413–433 Google Scholar

Copyright information

© Springer-Verlag Wien 1998

Authors and Affiliations

  • Y. Riou
    • 1
  • P. Chambon
    • 1
  1. 1.École Centrale de NantesNantesFrance

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