Design of a Lined Landfill on Compressible Clays

by Gregory N. Richardson, Westinghouse, United States,
Richard T. Reynolds, Westinghouse, United States,

Document Type: Proceeding Paper

Part of: Serviceability and Durability of Construction Materials


In mid-August, 1989, a 500,000m3 landslide occurred at a commercially operated landfill in central Maine. The landslide material consisted of municipal solid waste (MSW) that rested on a thick deposit of weak marine clay-silt that provided a natural barrier to leachate seepage. During the slide, huge vertical crevices formed in the landfill. MSW dropped 6 to 9 meters into scarps formed in the underlying clay as the soil slid out from underneath the landfill. The total MSW area of movement exceeded 40,000m2 and resulted in the destruction of an adjacent 28,000m2 lined lateral expansion cell under construction. This paper summarizes the geotechnical evaluation performed to define stability and settlement considerations required in the design of a new lined landfill at this site.

Subject Headings: Soil compression | Municipal wastes | Landfills | Soil settlement | Clays | Soil stabilization | Landslides | Maine | United States

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