STUDY ON PARAMETER SENSITIVITY OF THE COMBINATION FAILURE OF LANDFILL WITH A DAM

摘要

Combination failure of a solid waste landfill is one of main failure mechanisms. Based on the force limit equivalence theory, one formulae to calculate the factor of safety of the combination failure of landfill with a dam was derived in this article, and then the sensitivities of parameters to influence landfill stability were analyzed. The parameters with the greatest influence on combination failure are the landfill angle α, θ and β, followed by the internal friction angle of solid waste Φsw, then the interface friction angle of landfill liner system δ, and H2, H1, δD, B and γ are the last. From the point of stability and economy of landfills, the front angle a of landfill is most important. The compaction of solid waste could improve the internal friction angle and choosing of liner with high internal friction are conductive to the stability of landfills.