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Ultimate bearing capacity of an anisotropic discontinuous rock mass. Part I: Basic modes of failure

Authors
Journal
International Journal of Rock Mechanics and Mining Sciences
1365-1609
Publisher
Elsevier
Publication Date
Volume
35
Issue
3
Identifiers
DOI: 10.1016/s0148-9062(97)00337-9

Abstract

Abstract The existence of a transverse strength isotropy concerning the strength in rock media due to the presence of a family of planes of weakness superimposed within an isotropic rock mass is considered. Six different mechanisms of failure are possible under a foundation depending on the boundary conditions and the orientation of the transverse isotropy. The theoretical bases for the determination of the ultimate load of a strip foundation on a rock mass are obtained, respectively, for the six different mechanisms. The following assumptions are adopted: (a) a non-linear behaviour through the rock mass, defined by the Hoek and Brown model (parameters m, s and the unconfined compressive strength, respectively) and (b) a linear strength behaviour along the planes of weakness, defined by their cohesion and angle of internal friction.

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