Figure 1.
Figure 2.
Figure 3.
Figure 4.
Percentage utilization for the limit state Λ and factor of safety (F) depending on slope geometry and calculation method for compacted clay as a mineral sealing layer_
| Geometrical parameters | Percentage utilization Λ (%) / factor of safety F (−) determined by the method: | ||||||
|---|---|---|---|---|---|---|---|
| Bishop | Fellenius/Petterson | Spencer | Janbu | Morgenstern-Price | |||
| α=20° | B=10 m | H=5 m | 94.1/1.33 | ||||
| H=10 m | |||||||
| H=30 m | |||||||
| H=50 m | 72.3/1.73 | 73.0/1.71 | 71.6/1.75 | 71.4/1.75 | 71.3/1.75 | ||
| B=50 m | H=5 m | 94.1/1.33 | |||||
| H=10 m | |||||||
| H=30 m | |||||||
| H=50 m | 70.8/1.77 | 72.3/1.73 | 70.8/1.76 | 70.8/1.76 | 70.8/1.76 | ||
| α=25° | B=10 m | H=5 m | 94.1/1.33 | ||||
| H=10 m | |||||||
| H=30 m | |||||||
| H=50 m | 87.7/1.42 | 89.1/1.40 | 87.3/1.43 | 87.2/1.43 | 87.2/1.43 | ||
| B=50 m | H=5 m | 94.1/1.33 | |||||
| H=10 m | |||||||
| H=30 m | |||||||
| H=50 m | 88.8/1.41 | 90.9/1.38 | 88.9/1.41 | 88.9/1.41 | 88.9/1.41 | ||
| α=30° | B=10 m | H=5 m | 94.1/1.33 | ||||
| H=10 m | |||||||
| H=30 m | 97.0/1.29 | 97.9/1.28 | 98.7/1.27 | 98.1/1.27 | 98.4/1.27 | ||
| H=50 m | – | – | – | – | – | ||
| B=50 m | H=5 m | 94.1/1.33 | |||||
| H=10 m | |||||||
| H=30 m | 102.0/1.22 | 105.4/1.19 | 102.1/1.22 | 102.1/1.22 | 102.1/1.22 | ||
| H=50 m | 107.5/1.16 | 110.3/1.13 | 107.6/1.16 | 107.6/1.16 | 107.6/1.16 | ||
| α=45° | B=10 m | H=5 m | 99.5/1.26 | 106.2/1.18 | 99.8/1.25 | 99.8/1.25 | 99.2/1.26 |
| H=10 m | 133.6/0.94 | 137.7/0.91 | 133.1/0.94 | 132.7/0.94 | 132.8/0.94 | ||
| H=30 m | – | – | – | – | – | ||
| H=50 m | – | ||||||
| B=50 m | H=5 m | 105.3/1.19 | 110.4/1.13 | 105.7/1.18 | 105.7/1.18 | 105.2/1.19 | |
| H=10 m | 126.5/0.99 | 132.7/0.94 | 127.0/0.98 | 126.9/0.98 | 127.0/0.98 | ||
| H=30 m | 158.8/0.79 | 165.4/0.76 | 159.2/0.79 | 159.3/0.78 | 159.2/0.79 | ||
| H=50 m | 171.5/0.73 | 178.4/0.70 | 171.9/0.72 | 171.8/0.73 | 171.8/0.73 | ||
Parameters of materials used for calculations of waste landfill stability
| Layer number | Material | γ (kN/m3) | ϕ/δ (°) | c/ca (kPa) |
|---|---|---|---|---|
| I | Municipal waste | 10.20 | 30.0 | 3.0 |
| II | Medium sand ID=0.60 | 16.68 | 33.6 | – |
| III | Medium sand + Non-woven geotextile | 9.02 | 27.0 | 14.0 |
| IV | Non-woven geotextile + Textured geomembrane HDPE | 5.29 | 24.0 | 0.0 |
| V | Textured geomembrane HDPE + Compacted clay | 14.91 | 19.0 | 9.3 |
| VI | Compacted clay IL=0.24 | 20.60 | 17.5 | 30.1 |
Parameters of materials used for alternative calculations of waste landfill stability
| Layer number | Material | γ (kN/m3) | ϕ/δ (°) | c/ca (kPa) |
|---|---|---|---|---|
| V | Textured geomembrane HDPE + Compacted fly ash | 11.77 | 12.0 | 10.0 |
| VI | Compacted fly ash R=0.97 | 14.32 | 40.0 | 42.0 |
Percentage utilization for the limit state (Λ) and factor of safety (F) depending on slope geometry and calculation method for compacted fly ash as a mineral sealing layer
| Geometrical parameters | Percentage utilization Λ (%) / factor of safety F (−) determined by the method: | ||||||
|---|---|---|---|---|---|---|---|
| Bishop | Fellenius/Petterson | Spencer | Janbu | Morgenstern-Price | |||
| α=30° | B=10 m | H=5 m | 94.1/1.33 | ||||
| H=10 m | |||||||
| H=30 m | 97.3/1.28 | 99.7/1.25 | 99.6/1.25 | 99.1/1.26 | 98.4/1.27 | ||
| H=50 m | – | – | – | – | – | ||
| B=50 m | H=5 m | 94.1/1.33 | |||||
| H=10 m | |||||||
| H=30 m | 102.0/1.22 | 105.4/1.19 | 102.1/1.22 | 102.1/1.22 | 102.1/1.22 | ||
| H=50 m | 107.5/1.16 | 110.3/1.13 | 107.6/1.16 | 107.6/1.16 | 107.6/1.16 | ||
| α=45° | B=10 m | H=5 m | 99.5/1.26 | 106.2/1.18 | 99.8/1.25 | 99.8/1.25 | 99.2/1.26 |
| H=10 m | 133.6/0.94 | 137.7/0.91 | 133.1/0.94 | 132.6/0.94 | 132.8/0.94 | ||
| H=30 m | – | – | – | – | – | ||
| H=50 m | – | – | – | – | – | ||
| B=50 m | H=5 m | 105.3/1.19 | 110.4/1.13 | 105.7/1.18 | 105.1/1.19 | 105.2/1.19 | |
| H=10 m | 126.5/0.99 | 132.7/0.94 | 127.0/0.98 | 126.9/0.98 | 127.0/0.98 | ||
| H=30 m | 158.8/0.79 | 165.4/0.76 | 159.2/0.79 | 159.3/0.78 | 159.2/0.79 | ||
| H=50 m | 171.5/0.73 | 178.4/0.70 | 172.4/0.72 | 171.8/0.73 | 171.8/0.73 | ||