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Stability of Stored Municipal Waste for Different Sealing Systems

Katarzyna Zabielska-Adamska
Katarzyna Zabielska-Adamska
 oraz 
Justyna Markowska
Justyna Markowska
   | 31 gru 2023
Architecture, Civil Engineering, Environment's Cover Image
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Data publikacji: 31 gru 2023
Zakres stron: 125 - 133
Otrzymano: 28 kwi 2023
Przyjęty: 04 cze 2023
DOI: https://doi.org/10.2478/acee-2023-0056
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© 2023 Katarzyna Zabielska-Adamska et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Scheme of municipal waste storage at the landfill
Scheme of municipal waste storage at the landfill

Figure 2.

Cross-section through a single-sealing layer of slope and base of the landfill made of compacted clay or compacted fly ash
Cross-section through a single-sealing layer of slope and base of the landfill made of compacted clay or compacted fly ash

Figure 3.

Examples of slip surfaces generated with the GEO5 program for classic clay mineral sealing layer: a), b), c) the stability of the structure is preserved, d) the stability of the structure was not preserved
Examples of slip surfaces generated with the GEO5 program for classic clay mineral sealing layer: a), b), c) the stability of the structure is preserved, d) the stability of the structure was not preserved

Figure 4.

Examples of slip surfaces generated with the GEO5 program for fly ash as a mineral sealing layer: a) the stability of the structure is preserved, b) the stability of the structure was not preserved
Examples of slip surfaces generated with the GEO5 program for fly ash as a mineral sealing layer: a) the stability of the structure is preserved, b) the stability of the structure was not preserved

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
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Język:
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