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Investigation and Liquefaction Mitigation of Landfill Perimeter Levee
Vertical expansion of the Newby Island Sanitary Landfill (NISL) on the margins of the San Francisco Bay in an environmentally-sensitive estuarine setting is contemplated by the owner. A geotechnical investigation for the proposed expansion concluded that perimeter levee stability could be compromised by liquefaction of silty sand lenses within underlying clayey foundation soils during the moment magnitude 7.1 design earthquake. This extensive investigation included over 470 cone penetration tests, rotary borings, geophysics, laboratory testing, seismic hazard assessments, site-specific site response analyses, liquefaction triggering analyses, and slope stability and seismic deformation analyses. Since these analyses estimated unacceptably large levels of potential deformation for a synthetically lined landfill, design of in-situ cement stabilization by deep soil mixing proceeded with the benchmark being a reduction of potential deformations to less than 15 cm (6 in). The first phase of perimeter levee stabilization is currently underway to mitigate this stability concern, with completion scheduled for September 2012.
Investigation and Liquefaction Mitigation of Landfill Perimeter Levee
Vertical expansion of the Newby Island Sanitary Landfill (NISL) on the margins of the San Francisco Bay in an environmentally-sensitive estuarine setting is contemplated by the owner. A geotechnical investigation for the proposed expansion concluded that perimeter levee stability could be compromised by liquefaction of silty sand lenses within underlying clayey foundation soils during the moment magnitude 7.1 design earthquake. This extensive investigation included over 470 cone penetration tests, rotary borings, geophysics, laboratory testing, seismic hazard assessments, site-specific site response analyses, liquefaction triggering analyses, and slope stability and seismic deformation analyses. Since these analyses estimated unacceptably large levels of potential deformation for a synthetically lined landfill, design of in-situ cement stabilization by deep soil mixing proceeded with the benchmark being a reduction of potential deformations to less than 15 cm (6 in). The first phase of perimeter levee stabilization is currently underway to mitigate this stability concern, with completion scheduled for September 2012.
Investigation and Liquefaction Mitigation of Landfill Perimeter Levee
Warner, Robbie M. (Autor:in) / Lass, Gary L. (Autor:in) / Pelletier, Anthony M. (Autor:in) / Turk, Frank J. (Autor:in)
Geo-Congress 2013 ; 2013 ; San Diego, California, United States
Geo-Congress 2013 ; 2126-2142
25.02.2013
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Investigation and Liquefaction Mitigation of Landfill Perimeter Levee
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