Rotational Sliding

Failure surface appears as a segment of horizontal cylinder, ranging from local sloughing of tailings at random areas along the face of an embankment to massive circular arc slides extending over the entire structure. Specifically, causes of rotational failure may include changes in the water table, changes in the permeability of foundation materials and disturbances to the embankment caused by vibration or impact loading, settlement of the foundation materials, etc (CANMET 1977).