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that control steepness of slopes and surface-water drainage from site 2. Knowing the geologic history of area (requires geologic mapping to
identify active andancient landslide areas and the further studies to
determine the timing, triggering factors, and scale of previous landslide
events. (recognize places where it's happened, learn not to build there) 22 Other measures (from engineering standpoint):
Grading (add material to reduce slope angle)
Surface and subsurface drainage control (devices to permit
drainage of excess water from soil and underlying weathered
Retaining walls, and slope supports (stabilize slope and
support surfaces of potential weakness such as fault planes
and rupture surfaces under potential slump blocks).
Anchoring into bedrock (to reduce load and prevent slippage
of man-made structures due to deformation of loose
(put pilings in), retaining walls
23 Preventing landslides: Some good strategies
(as described in previous slide) BOTTOM LINE: MASS WASTING EVENTS ARE EXPENSIVE TO PREVENT BUT
INVESTING IN PREVENTION IS CHEAPER THAN RECOVERY!
24 8 END OF LECTURE 9...
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- Fall '14