Model for degradation-induced settlements as part of a coupled landfill model

Abstract

Summary This paper deals with a model for time‐dependent compaction of soil‐like porous materials. Although the model is originally developed for degradation‐induced settlements in municipal solid waste landfills, it may be applied to any settlements caused by solid mass loss as well. The presented model is part of a coupled THMC model, that is, a model that considers coupled thermal, hydraulical, mechanical and chemical effects. The Theory of Porous Media is used as continuum mechanical framework. For kinematic description, large strain continuum mechanics are applied. The paper provides a brief insight into the coupled model, but concentrates on the description of the compaction model and its application within coupled analyses of a laboratory experiment and a landfill structure. Copyright © 2017 John Wiley & Sons, Ltd.

Coupled mechanical creep and bio-compression and residual settlement in a multi-stage municipal solid waste landfill, Korea

“…This is because it is difficult to obtain data measured for decades at landfill sites for several reasons, e.g., the malfunctioning of settlement plates due to physical and chemical corrosion. It also remains unknown for how long MSW landfills have to be monitored as existing landfill sites are still in aftercare period 10 .…”

Analytical Modelling of MSW Landfill Surface Displacement Based on GNSS Monitoring

“…Displacement of MSW is a complex process that depends on mechanical factors due to waste overburden and on physical, biological, and chemical processes occurring on such structures [ 6 , 7 , 8 , 9 ]. The factors affecting displacement process the most are morphological composition, thickness of waste layers, stress history depending on waste compaction method, the initial density of waste material due to compaction, waste particles’ size distribution, degradable components content, leachate level, drainage characteristics, atmospheric conditions (moisture content, temperature), and time that the waste has been disposed on the landfill [ 10 , 11 , 12 ]. Top et al [ 13 ] indicated that the settlement of MSW can be enhanced by the aeration and leachate recirculation.…”

Development of a Coupled Thermal-Mechanical-Biological Model to Simulate Temperatures and Settlement at a Landfill in Ste Sophie, Quebec

“…These processes may be split up into four major parts -mechanical processes i.e. the stress-strain behavior, hydraulic processes, which are governed by transport of pore fluids, biochemical processes like biological degradation, and thermal processes which impact the temperatures of the waste (Bente et al 2017). This chapter provides an overview on modelling studies related to the processes mentioned above -starting with a description of the approaches taken to simulate each of the biological, mechanical, hydraulic and thermal processes and followed by a description of the coupled approaches adopted by various researchers for the prediction of the constitutive behavior of MSW.…”

“…So far, there has been only two fully coupled models developed, one by Bente et al (2017) and another by Hubert et al (2016), which include thermal, hydraulic, mechanical and biochemical (THMB) processes for degradation induced settlements in MSW landfills.…”