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dc.contributor.authorDickinson, Simon
dc.contributor.otherQueen's University (Kingston, Ont.). Theses (Queen's University (Kingston, Ont.))en
dc.date2008-09-05 10:47:21.783en
dc.date.accessioned2008-09-05T19:10:38Z
dc.date.available2008-09-05T19:10:38Z
dc.date.issued2008-09-05T19:10:38Z
dc.identifier.urihttp://hdl.handle.net/1974/1409
dc.descriptionThesis (Ph.D, Civil Engineering) -- Queen's University, 2008-09-05 10:47:21.783en
dc.description.abstractThe physical response of composite landfill liners consisting of a geomembrane on top of a geosynthetic clay liner (GCL) are examined under simulated landfill conditions. The deformation and strains of a 1.5-mm-thick high-density polyethylene geomembrane and thickness and hydraulic performance of a nominally 7-mm-thick GCL are quantified when the composite liner was buried beneath 50 mm coarse gravel, at applied pressures up to 1000 kPa, with a firm sand foundation layer, and with and without a wrinkle in the geomembrane. At an applied pressure of 250 kPa, with either no protection or conventional thick nonwoven needle-punched geotextile protection layers, the tensile strains in the geomembrane exceeded a 3% allowable limit and the GCL was reduced in thickness to as little as 2.2 mm from extrusion of bentonite beneath a gravel particle. Whereas a 150-mm-thick sand protection layer limited strains in the geomembrane to 0.1% and prevented extrusion in the GCL so that deformation was from bentonite consolidation and not from extrusion. A GCL with a thickness of less than 3 mm from extrusion was shown to be susceptible to failure from internal erosion of bentonite in the GCL at hydraulic head differences across the GCL between 1-10 m. Conversely with the sand protection layer, the GCL could withstand a head difference of greater than 100 m without any evidence of internal erosion. Further, the permittivity of an extruded 3.5-mm-thick GCL was found to be 4.5 times larger than a 7-mm-thick GCL that did not experience extrusion.en
dc.format.extent15376830 bytes
dc.format.mimetypeapplication/pdf
dc.languageenen
dc.language.isoenen
dc.relation.ispartofseriesCanadian thesesen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectLandfillen
dc.subjectGeosynthetic Clay Lineren
dc.subjectGeomembraneen
dc.subjectProtectionen
dc.titlePhysical response of composite geomembrane / geosynthetic clay liners under simulated landfill conditionsen
dc.typethesisen
dc.description.degreePh.Den
dc.contributor.supervisorBrachman, Richard W. I.en
dc.contributor.departmentCivil Engineeringen


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