| Titre : | Investigation of lateral stress relief using finite elements and fracture mechanics : Case history study of the saxon pit (2013) |
| Auteurs : | Walter G. Kutschke, Auteur ; Luis E. Vallejo, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of geotechnical and geoenvironmental engineering (Vol. 138 N° 10, Octobre 2012) |
| Article en page(s) : | pp.1277–1283. |
| Note générale : | Géotechnique |
| Langues : | Anglais |
| Tags : | Lateral stress relief Stiff clay Finite-element method Fracture mechanics |
| Résumé : | A published case history on the performance of a 29-m-deep excavation that occurred in stiff Oxford clay provides direct field evidence that lateral stress relief can produce shear planes. A finite-element model was developed to investigate the impact of lateral stress relief on this slope. The finite-element model utilized published site characterization data and incorporated shear-strength reductions along closed failure planes. Lateral stress relief resulted in an outward slope face movement that produced sufficient differential shear strain to develop and propagate a horizontal crack at the base of the slope. Analyses indicate excellent agreement with observed lateral and vertical slope face movements. The finite-element model suggests that the slope essentially behaved as a shear model. Recognizing the behavior of this slope, the principles of linear elastic fracture mechanics are expanded to consider closed crack propagation under shear loading conditions. Analyses indicate that a closed crack under shear loading will propagate along the preexisting crack plane, as observed in the Oxford Slope. |
| ISSN : | 1090-0241 |
| En ligne : | http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000688 |
