Journal
COMPUTERS AND GEOTECHNICS
Volume 109, Issue -, Pages 204-219Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2019.01.012
Keywords
Municipal solid waste; Landfill; Leachate-gas flow; Consolidation; Finite volume method
Categories
Funding
- Fundamental Research Funds for Central Universities [0200219152]
- National Natural Science Foundation of China [41572265, 41661130153, 41725012]
- Shuguang Scheme [16SG19]
- Newton Advanced Fellowship of the Royal Society [NA150466]
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A bio-hydro-mechanical model is developed to describe interactions between leachate flow, landfill gas flow and waste deformation. The model is developed based on three-phase consolidation theory; and the governing equations are solved by finite volume method. The proposed model is effectively validated by two well-designed laboratory tests. The simulation results for a typical conceptual landfill demonstrate that ignoring the waste consolidation yields a little bit smaller leachate and gas pressures, as well as smaller waste deformation, neglecting landfill gas generation and flow will distinctly underestimate the leachate pressure and then overestimate the effective stress, which may eventually cause slope failure.
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