GEOE 413 Lecture Notes - Lecture 12: Landslide Classification, Debris Flow, Earthflow
20 Nov 2016
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Different ways to describe rockslide types depending on how it occurs: 10 types see diagrams, rotational, translational, block slide (occurs on translational base), rock fall, topple, debris flow, debris avalanche, earth flow, creep, lateral spread. Continuity of joints and spacing: small enough blocks that the surface can fail through can cause the circular failure, not a planar failure. Important variables: type of movement, slope material type, amount of water present, rate of movement. Extremely rapid = 30m/sec: speed speaks to what we will do about it. Rock sliding along shear surface; rock block remains largely intact for at least part of the movement. Slide failure example from bc near winter olympics: volume = 16000m3, removed some overhanging rocks later to reopen highway, thought ditch on side would deal with any rock fall. Material that is moving on a non-planar surface. See flow chart in notes: types of failure and analysis with equilibrium techniques.
