Rapid graphical analysis of rock slopes

CIM Bulletin, Vol. 83, No. 937, 1990

D.M. Cruden, Department of Civil Engineering, University of Alberta, Edmonton, Alberta

When two discontinuities form a tetrahedral wedge in a rock slope, a factor of safety for the wedge can be simply calculated (if motion is driven only by gravity and resisted only by friction) from plots of the normals to discontinuities on an overlay of a polar, equal-area spherical projection to which the great circles of a similar equatorial projection have been added.
Mots Clés: Rock mechanics, Slope analysis, Rock wedge, Graphic methods.