Pore Pressure Effect on Slope Stability
Easyslope stabilitypore pressure
With all else constant, increasing pore-water pressure in a soil slope generally causes its factor of safety to:
- AIncrease
- BRemain constant
- CDecrease
- DBecome exactly 1.0
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Answer: C. Decrease
Pore pressure reduces effective normal stress, which reduces frictional shear strength. The factor of safety therefore decreases.
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