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Design Considerations for GCLs Used in Alaska Landfills
This paper describes design considerations associated with the use of a geosynthetic clay liner (GCL) in both the base lining system of a planned new cell and in the final cover of an existing unlined cell at the Central Landfill in Palmer, Alaska. The Cell 2B base lining system will include a composite geosynthetic liner consisting of an 80 mil (2 mm) textured HDPE liner overlying a GCL on both the sideslopes and base of the cell. A similar base lining system has been used successfully at the nearby Anchorage Regional Landfill. The use of this lining system in a Seismic Zone 4 area on relatively steep side slopes requires careful evaluation of both internal shear strength of the GCL and interface friction between the GCL and textured HDPE. Summarized results of shear strength testing performed on several types of GCL at both high and low normal stresses are presented here. Design considerations for use of a GCL in the final cover over unlined Cell 2A at the Central Landfill are also discussed. Requirements for GCL conformance testing and construction quality assurance are briefly described. Examples of GCL use in other Alaska landfills are also referenced.
Design Considerations for GCLs Used in Alaska Landfills
This paper describes design considerations associated with the use of a geosynthetic clay liner (GCL) in both the base lining system of a planned new cell and in the final cover of an existing unlined cell at the Central Landfill in Palmer, Alaska. The Cell 2B base lining system will include a composite geosynthetic liner consisting of an 80 mil (2 mm) textured HDPE liner overlying a GCL on both the sideslopes and base of the cell. A similar base lining system has been used successfully at the nearby Anchorage Regional Landfill. The use of this lining system in a Seismic Zone 4 area on relatively steep side slopes requires careful evaluation of both internal shear strength of the GCL and interface friction between the GCL and textured HDPE. Summarized results of shear strength testing performed on several types of GCL at both high and low normal stresses are presented here. Design considerations for use of a GCL in the final cover over unlined Cell 2A at the Central Landfill are also discussed. Requirements for GCL conformance testing and construction quality assurance are briefly described. Examples of GCL use in other Alaska landfills are also referenced.
Design Considerations for GCLs Used in Alaska Landfills
Merrill, Kelly (author) / Friedman, Henry (author) / Goodale, Greg (author)
11th International Conference on Cold Regions Engineering ; 2002 ; Anchorage, Alaska, United States
Cold Regions Engineering ; 922-937
2002-05-08
Conference paper
Electronic Resource
English
Design Considerations for Geosynthetic Clay Liners (GCLs) Used in Alaska Landfills
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