1. Risk Analysis in Slope Stability Analysis Landslide risk in Sweden
- geology and geo-technology
Göran Sällfors

2.
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5.
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7. From the perspective of a geotechnical engineer
Göran Sällfors
From the perspective of a
geotechnical engineer

8. F = R / E = τ(faiure) / τ(mobilized)
Göran Sällfors
F = R / E = τ(faiure) / τ(mobilized)

9.
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10.
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11. * loads (road, railroad)
Static
Time dependent
* pore pressure
* loads (road, railroad)
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12. We have methods for determining - U(200 years)
Göran Sällfors
We have methods for determining
- U(200 years)
- Max load from road and railroad

13. (landscaping, construction ...
Future changes
Erosion
Climate
Human activity
(landscaping, construction ...
Göran Sällfors

14. How to handle Erosion How much can we accept Monitoring
How much can we accept
Monitoring
Erosion protection
Göran Sällfors

15. How to handle Erosion Climate u(200 years) 2019-04-27
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16. How to handle Erosion Climate Human activity most difficult filling
piling
excavation
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17. When F is too small, then P(f) is too larg, and then some
Action is required so that P(f) is decreased and becomes satisfactory.
Göran Sällfors

18. Improving the stability - Methods
Improving the stability
- Methods
Göran Sällfors

19. Improving the stability - Methods
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20. Improving the stability - Methods
Göran Sällfors

21. Improving the stability - Methods
Göran Sällfors

22. Improving the stability - Methods
Göran Sällfors

23. Improving the stability - Methods
Göran Sällfors

24. Improving the stability - Methods
Göran Sällfors

25. Improving the stability - Methods
Göran Sällfors

26. Improving the stability - Methods
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27. Improving the stability - Extent of Remedial Work
Conservative
F(min) = a given value irrespective of existing F
Reasonable?
The lower F, the larger the percentage increase is required
Göran Sällfors

28. Improving the stability - Extent of Remedial Work
Conservative
F(min) = a given value irrespective of existing F
Reasonable?
The lower F, the larger the percentage increase is required
The smaller Coefficient of variation for F,
the smaller percentagewise improvement of F
Göran Sällfors

29.
2:96 fig
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30. Coupled to consequence ... .. .
Coupled to consequence
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31. Engineeringn judgement - earlier sliding activity
Engineeringn judgement
- earlier sliding activity
Göran Sällfors

32. Engineeringn judgement - earlier sliding activity - risk for erosion
Engineeringn judgement
- earlier sliding activity
- risk for erosion
Göran Sällfors

33. Engineeringn judgement - earlier sliding activity - risk for erosion
Engineeringn judgement
- earlier sliding activity
- risk for erosion
- climate change
Göran Sällfors

34. Engineeringn judgement - earlier sliding activity - risk for erosion
Engineeringn judgement
- earlier sliding activity
- risk for erosion
- climate change
- future land use
Göran Sällfors

35. Engineeringn judgement - earlier sliding activity - risk for erosion
Engineeringn judgement
- earlier sliding activity
- risk for erosion
- climate change
- future land use
Göran Sällfors

36.
Thank you !
- Comments?
Göran Sällfors