Une méthode d'étude des excavations souterraines en milieu viscoplastique. Prise en compte d'un état stationnaire des contraintes

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A simple and effective back analysis method has been proposed on the basis of a new criterion of identification, the minimization of error on the virtual work principle. This method works for both linear elastic and nonlinear elasto-plastic problems. The elasto-plastic rock mass properties for different criteria of plasticity can be well identified based on field measurements.

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