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Unformatted text preview: 'td, and hence has the lowest safety factor defined as: FS = ~ = C + crtancj> 'td Cd + crtancj>d FS = ( tancj> ) ~ tancj>d where Cd and $d refer to the "developed" shear strength required for stability o Note that if the c and $ strength are developed at the same rate then FS = FS, = FS, o In the absence of external forces (W w , W h and V) the shear strength Cd mobilized for a clay with a given combination of slope angle i, slope height H, unit weight y can be calculated s~(~~...
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- Fall '08