This paper describes centrifugal tests on small-scale two- and three-dimensional models of rock slopes in a simple sedimentary structure comprising continuous bedding planes crossed by joints. The bedding planes dip towards the slope, the dip angle being gentle enough to preclude planar failure. The results indicate that failure occurs throughout the slope height and is strongly influenced by the relative joint and bedding plane spacings. No unique surface of failure occurs. Extension to three dimensions indicates that stability and magnitude of failure are affected by the curvature of the slope in plan.

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