Design and installation of an exposed geomembrane landfill final cover in Louisiana
Design and installation of an exposed geomembrane landfill final cover in Louisiana
The Tangipahoa Regional Solid Waste Facility (TRSWF) is a municipal solid waste (MSW) landfill located in Independence, Louisiana, U.S.A. which recently installed a relatively new type of geosynthetic final cover consisting of a high-density polyethylene (HDPE) exposed geomembrane anchored with percussive driven earth anchors (PDEAs). This new system was used to close an approximate 10- hectare disposal cell of the TRSWF. In 2014, two other cells were closed also using a synthetic final cover system, however, an artificial turf system was installed at that time. Geosynthetic final covers have been the preferred method for landfill cell closure at the facility due to the steep slopes, highly erodible clays, and low pH topsoil. The authors designed the exposed final cover to account for the several forces acting on the geomembrane such as self-weight, wind suction, anchor pull-out resistance, and landfill gas pressure. One of the main environmental advantages of exposed geomembranes systems is that by not having soils as components, surface runoff is expected to have better quality than the runoff of other cover systems. Performance of both final cover systems installed at the facility (the artificial turf system and the exposed geomembrane system) are currently being monitored. In this study, the authors wanted to demonstrate that exposed geomembrane final cover systems can be designed and installed even under very adverse conditions, such as in the case study presented herein.
D. Romero; R. De Abreu; J. Deamer
9th International Congress on Environmental Geotechnics (ICEG2023)
Geosynthetics for the Geoenvironment
Landfill Engineering
https://doi.org/10.53243/ICEG2023-209
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