SharePoint
Aide
IRSN, Institut de radioprotection et de sûreté nucléaire

Search our site :

ok

Contact us :

ok
En Fr

Enhancing Nuclear Safety


Research

Publications

Time dependant behaviour of tournemire argilites (France).

A Rejeb

Technology roadmap for rocks mechanics, South African institute of mining and Metallurgy ISRM 2003, 08 to 12 september 2003, Gauteng South Africa.

Document type > *Congrès/colloque

Keywords > argillaceous environment, deep storage, underground laboratory

Research Unit > IRSN/DEI/SARG/BEHRIG

Authors > REJEB Amel

Publication Date > 03/09/2003

Summary

This paper contributes to the study of underground structures in argillaceous media, especially Tournemire argilites (France). The basic results obtained over six years in 2 experimental drifts at the Tournemire site are presented. In situ measurements cover drift wall temperature, humidity and convergence. Delayed convergence represents 50 to 65ù of the total measured convergence. Analysis of the measurements has shown that delayed convergence is explained by the viscoplastic behaviour of the argillaceous formations. Lemaitre's rheological model has been extended to the orthotropic case, as Tournemire argilite is naturally anisotropic. The triaxial creep test results on samples at different orientations enabled the parameters  of the Tournemire argilite to be identified in terms of orthotropic viscoplastic law. A plane deformation model, using this rheological law and the initial stress field in the site was developped to interpret the convergence measurements in the drifts. The computed results match the measurements well, especially during the excavation phase.

Close

Send to a friend

The information you provide in this page are single use only and will not be saved.
* Required fields

Recipient's email:*  

Sign with your name:* 

Type your email address:*   

Add a message :

Do you want to receive a copy of this email?

Send

Cancel

Close

WP_IMPRIMER_TITLE

WP_IMPRIMER_MESSAGE

Back

Ok