EAS105 Lecture Notes - Lecture 11: Quick Clay, Clay Minerals, Riprap
7 Mar 2018
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Chapter 11, p. 256-281 the changing earth 7e: types of mass movements. Underlying or downslope support is usually removed by such thing as: natural forces such as cliff erosion and wave action, or human activities like mining and excavation: topple. Defined: these movements involve shear and displacement along a surface or narrow zone of failure, with the displaced mass exhibiting (little or) no internal deformation (virtually undeformed: translational slide, or glide. (fig 11. 9) the failure surface is as described: is curved, concave upward, with the axis of rotation above the center of mass/gravity (think pendulum) Usually, the circumstance is as follows: the shear strength of unconsolidated materials is exceeded (e. g soils) Note that there are usually several scarps (exposed failure surfaces) at the head, flanks, and internally also. Note that the toe of the slump will be this type of mass movement: a flow.
