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Laboratory test results in successive years (mean values from three boreholes)_
| Properties | Depth [m] | Years | ||||||
|---|---|---|---|---|---|---|---|---|
| 2004 | 2007 | 2009 | 2011 | 2013 | 2015 | 2017 | ||
| Water content, w [%] | 0.5 | 38.13 | 33.81 | 30.74 | 29.64 | 29.01 | 30.17 | 28.13 |
| 2.0 | 34.14 | 31.41 | 30.78 | 30.06 | 29.42 | 30.20 | 28.46 | |
| Plastic limit, wP [%] | 0.5 | 24.74 | 24.05 | 24.17 | 24.06 | 24.63 | 24.24 | 24.24 |
| 2.0 | 24.87 | 24.15 | 24.12 | 23.98 | 23.98 | 25.04 | 24.26 | |
| Liquid limit, wL [%] | 0.5 | 51.15 | 51.02 | 50.44 | 50.57 | 49.65 | 51.07 | 51.11 |
| 2.0 | 50.60 | 50.84 | 50.65 | 51.21 | 49.85 | 48.96 | 50.05 |
Parameters of the geotechnical layers used in the stability calculations [26, 27]_
| Geotechnical layer | Volumetric weight, γ [kN/m3] | Cohesion, cu [kPa] | Angle of internal friction, ϕu [°] |
|---|---|---|---|
| II (sasiCl/Cl, IL = 0.15) | 20.8 | 45.0 | 9.9 |
| III (Co and sasiCl/Cl, IL = 0.05) | 20.6 | 46.8 | 10.8 |
| IV (Carpathian flysch) | 22.0 | 63.0 | 36.0 |
| V (municipal waste) | 11.0 | 10.8 | 19.8 |
| VI (organic soil) | 16.0 | 13.0 | 3.2 |
Retaining embankment soil parameters by liquidity index IL used in the stability calculations_
| Properties | Years | ||||||
|---|---|---|---|---|---|---|---|
| 2004 | 2007 | 2009 | 2011 | 2013 | 2015 | 2017 | |
| Liquidity index, IL | 0.36, C | 0.27, C | 0.25, C | 0.22, C | 0.21, C/B | 0.22, C/B | 0.16, C/B |
| Unit weight, γ [kN/m3] | 20.0 | 20.0 | 20.0 | 21.0 | 21.0 | 21.0 | 21.0 |
| Cohesion, cu [kPa] | 12.0 | 14.0 | 15.0 | 17.0 | 24.0 | 23.0 | 26.0 |
| Angle of internal friction, ϕu [°] | 12.0 | 13.5 | 14.0 | 14.5 | 16.5 | 16.3 | 17.5 |