Slope Stability Parameters: Bishop_simplified#25
Slope stability parameters — Taylor stability numbers (Ns) for c-phi and phi=0 soils with depth factors, infinite slope factor of safety (dry and saturated), and Bishop simplified method FS values with pore pressure ratio and seismic coefficient
| method slope | phi D key | cohesion ratio c over gamma H (dimensionless) | depth factor D (dimensionless) | factor of safety (dimensionless) | friction angle deg (deg) | method | notes | pore pressure ratio ru (dimensionless) | seismic coefficient kh (dimensionless) | slope angle deg (deg) |
|---|---|---|---|---|---|---|---|---|---|---|
| Bishop_simplified#25 | phi25#D1#ru0#kh0 | 0.06 | 1 | 1.72 | 25 | Bishop_simplified | phi=25 deg; gentle slope; FS>1.5 achievable at moderate cohesion | 0 | 0 | 25 |
| Bishop_simplified#25 | phi25#D1#ru0.3#kh0 | 0.06 | 1 | 1.42 | 25 | Bishop_simplified | ru=0.3; FS reduced from 1.72; still above 1.35 minimum | 0.3 | 0 | 25 |
| Bishop_simplified#25 | phi30#D1#ru0#kh0.15 | 0.04 | 1 | 1.3 | 30 | Bishop_simplified | kh=0.15; phi=30 deg; slope stable under moderate seismic loading | 0 | 0.15 | 25 |
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