Toland Road Landfill
Innovative Design and Construction of Landfill Side-Slope Liners in High
Seismic Risk Areas - A Case Study
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Abstract Design and construction of a side-slope composite liner system for the expansion of the Toland Road Landfill in Ventura County, California, required the innovative use of enhanced geosynthetic materials to achieve desired slope stability performance objectives. Extensive laboratory testing of numerous geosynthetic materials led to the development of a preferential slip plane above the geomembrane liner using materials which fell within a narrow shear strength envelope determined from the minimum friction angle required for slope stability and the lowest friction angle beneath the geomembrane. Discussions with two major geosynthetic clay liner (GCL) manufacturers and with the selected geomembrane manufacturer led to the development of custom GCL products with increased internal strength and geomembrane products with more aggressive texturing. In order to demonstrate their ability to comply with construction specifications, project bidders were required to perform material performance testing prior to contract execution. |
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