Taylor-charts

# Taylor-charts - Taylor Charts Types of Failures Taylor...

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Unformatted text preview: Taylor Charts Types of Failures Taylor Charts FS d c tan c d tan d FS c c c d FS tan tan d FS with respect to cohesion FS with respect to friction If c d and ϕ d developed at the same time: FS = FS c = FS ϕ Taylor 1 • Only for ϕ = 0 ° (only developed cohesion happens) • Problem: find FS c or inclination I • Depth of failure may be limited by a hard stratum (assume “d” as the depth to the hard stratum) • Depth factor (D) = d/H (H = height of slope) • Only for short term analyses (total stress) • No seepage forces (no effective stresses) • 2 cases: – a) Base failure (where n s a factor that multiplied by H gives the distance from the toe where the failure will happen) use full line (i lines) of chart – B) Base failure is limited by a ditch forced toe failure d = H so D = 1 use long dashed lines • Short dashed lines gives you n values Taylor 1 for = 0 ° FS c c N S H 1. Indentify your case 2. Enter D 3. Intersect with i curve 4. Read stability value 5. Calculate FS c 6. If n < 0 slope (face) failure N s c d H 0.181 Taylor 2 • Use for ϕ ≥ ° soil has friction component fuly mobilized • F S ϕ = 1 Find FS c • If ϕ > 0 ° both charts could be used if D = 0 or D = ∞ • Depth of failure may be limited by a hard stratum (assume “d” as the depth to the hard stratum) • Depth factor (D) = d/H (H = height of slope) • Only for short term analyses (total stress) • No seepage forces (no effective stresses) • 2 zones: – Zone A: toe failure, steeper slopes use full lines of ϕ d – Zone B: 3 cases:...
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Taylor-charts - Taylor Charts Types of Failures Taylor...

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