Page 264 - Engineering Rock Mass Classification_ Tunnelling, Foundations and Landslides
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224 Engineering Rock Mass Classification
FIGURE 17.12 Some types of complex slope movements.
The orientation of platy clay particles takes place in a thin zone along the slip surface.
As such, the strength parameters along the actual slip surface are significantly lower than
those along any other assumed slip surface.
ROCK SLOPE FAILURES
Natural rock slopes support the foundations of dams, penstocks, buildings, abutments of
bridges, and transmission towers. From a design aspect, it is essential to recognize the
types of rock slides, which are often complex. Table 17.3 describes these failure modes
