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A deep cut of 7 m has to be made in a clay with unit weight 16 kN/m3 and a cohesion of 25 kN/m2. What will be the factor of safety if one has to have a slope angle of 30°? Stability number is given to be 0.178 (from Taylor’s chart) for a depth factor of 3.
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- 0.80
- 1.1
- 1.25
- 1.0
Correct Option: C
| Sn = | Fc.γH |
| 0.178 = | Fc.16 × 7 |
⇒ Fc = 1.25
