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Nailed Slopes
Verification – factor of safety
The analysis checks whether a ratio of resisting and shear (driving) forces acting on a slip surface is greater than the inputted factor of safety.
A factor of safety on the inputted slips forces is thus provided by:
| where: | G | - | gravity force |
| Sa,sv | - | vertical component of active pressure | |
| Sa,vod | - | horizontal component of active pressure | |
| di | - | length of ith section slip surface | |
| d | - | length of slip surface | |
| Fh,n | - | bearing capacity of nth nail behind slip surface per 1 running meter | |
| ci | - | cohesion of ith soil layer | |
| φi | - | angle o internal friction of ith layer | |
| υ | - | inclination of slip surface | |
| α | - | inclination of nails from horizontal direction |
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