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

✍ Scribed by Serrano, A. ;Olalla, C.

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 567 KB
• Volume: 35
• Category: Article
• ISSN: 0148-9062
• DOI: 10.1016/s0148-9062(97)00337-9

✦ Synopsis

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 dierent 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 dierent mechanisms. The following assumptions are adopted: (a) a non-linear behaviour through the rock mass, de®ned by the Hoek and Brown model (parameters m, s and the uncon®ned compressive strength, respectively) and (b) a linear strength behaviour along the planes of weakness, de®ned by their cohesion and angle of internal friction.