Abstract
AbstractRapid industrialization and population explosion in recent times have led to the generation of large quantities of municipal solid waste (MSW), which has driven the MSW landfill sites to the brink of their design life. A viable option of extending the design life of these existing MSW landfills is through adoption of a suitable ground improvement methodology in a planned manner. The present study reports the effectiveness of dynamic compaction (DC) for MSW landfills by using finite element (FE)-based analysis in ABAQUS (ver. 6.14). The response of MSW is modelled by adopting the Drucker–Prager constitutive law and arbitrary Lagrangian–Eulerian (ALE) remeshing approach. The results indicate volumetric compression and densification of wastes under the impact of DC for various ranges of tamper energy, tamper radius and waste compressibility. An empirical equation is formulated based on optimized design parameters for obtaining DC-induced settlement of MSW landfills in the field. The predictive design equation is subsequently validated by comparing the settlement values obtained using the equation with selected field case histories. Additionally, the effectiveness of DC in vertical landfill expansion or piggyback construction is investigated in the study and found to be effective. The present research thus explores the possibility of enhancing waste disposal capacity of MSW landfills for further waste disposal, or for reclamation of MSW sites for future infrastructure projects.KeywordsDynamic compactionMunicipal solid wasteLandfillsFE modellingPiggyback landfills
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