Upper-bound and lower-bound solutions for the axisymmetric compression of a concrete plug

Olivier Deck 1 Cyrille Balland 2 Jacques Morel 2 Rémi de la Vaissiere 3
1 ENSMN - Ecole Nationale Supérieure des Mines de Nancy
2 INERIS - Institut National de l'Environnement Industriel et des Risques
3 ANDRA - Agence Nationale pour la Gestion des Déchets Radioactifs
Abstract : Deep radioactive waste deposits require specific solutions to close underground galleries and avoid any radioactive migration in the environment. One investigated solution consists of a swelling clay plug that induces a swelling pressure of approximately 7 MPa on the walls of the galleries. The clay plug is confined by a concrete plug to maintain and drive the swelling pressure towards the walls of the galleries. The concrete plug must therefore be designed to endure such a pressure. This paper addresses the mechanical strength of a cylindrical concrete plug with a ring-shaped tooth, a free face and a uniform compressive stress over the other face. Two experimental tests over 1/43 reduced samples are first performed and show two collapse mechanisms: dome collapse and tooth-shear collapse. Upper- and lower-bound solutions are investigated based on the Mohr–Coulomb criterion from nonlinear criteria of concrete. The choices of parameters for the friction angle (φ) and cohesion (C) are discussed in relation to the uniaxial compressive and tensile strength of the concrete and the magnitude of the stresses in the model. The results of the simplified analytical, numerical and experimental approaches are then compared, with good agreement found between the approaches.
Keywords : RADIOACTIVE WASTE DEPOSIT MOHR–COULOMB FINITE ELEMENT MODEL CONCRETE LIMIT ANALYSIS
Document type :
Journal articles
Complete list of metadatas
https://hal-ineris.archives-ouvertes.fr/ineris-01854098
Contributor : Gestionnaire Civs <>
Submitted on : Monday, August 6, 2018 - 2:53:43 PM
Last modification on : Friday, December 20, 2019 - 1:13:57 AM

Identifiers

Collections

INERIS | INSTITUT-TELECOM | UNIV-LORRAINE

Citation

Olivier Deck, Cyrille Balland, Jacques Morel, Rémi de la Vaissiere. Upper-bound and lower-bound solutions for the axisymmetric compression of a concrete plug. International Journal of Rock Mechanics and Mining Sciences, Pergamon, 2016, 83, pp.1-13. ⟨10.1016/j.ijrmms.2015.12.003⟩. ⟨ineris-01854098⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

104

Contact

Informations

CCSD