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A platform for research: civil engineering, architecture and urbanism
Centrifuge Modeling of Landfill Composite cover Systems
Geomembranes are one of the commonly used geosynthetic in landfill cover systems. Even though, geomembranes are widely used as a part of composite barriers in landfill cover systems, studies pertaining to its behavior at the onset of differential settlements are very limited. Considering the advantage of centrifuge modelling technique to achieve identical stress-strain behavior in model and prototype, centrifuge modelling technique was adopted in the present study to examine the deformation behavior of geomembrane at the onset of differential settlements. Two types of geomembranes with different thicknesses and tensile stiffness were modelled. The stiffness of geomembranes was found to have significant influence in the deformation behavior of composite barriers. The upward or downward thrust exerted by the geomembrane on the clay barrier was more for stiffer and thicker geomembrane. The mobilization of downward thrust exerted by the deformed geomembrane layer in a composite barriers acts like a fictitious overburden pressure and helps in maintaining sealing efficiency of clay-based composite covers. The downward thrust exerted by geomembrane on barriers suppresses the formation of cracks due to differential settlements.
Centrifuge Modeling of Landfill Composite cover Systems
Geomembranes are one of the commonly used geosynthetic in landfill cover systems. Even though, geomembranes are widely used as a part of composite barriers in landfill cover systems, studies pertaining to its behavior at the onset of differential settlements are very limited. Considering the advantage of centrifuge modelling technique to achieve identical stress-strain behavior in model and prototype, centrifuge modelling technique was adopted in the present study to examine the deformation behavior of geomembrane at the onset of differential settlements. Two types of geomembranes with different thicknesses and tensile stiffness were modelled. The stiffness of geomembranes was found to have significant influence in the deformation behavior of composite barriers. The upward or downward thrust exerted by the geomembrane on the clay barrier was more for stiffer and thicker geomembrane. The mobilization of downward thrust exerted by the deformed geomembrane layer in a composite barriers acts like a fictitious overburden pressure and helps in maintaining sealing efficiency of clay-based composite covers. The downward thrust exerted by geomembrane on barriers suppresses the formation of cracks due to differential settlements.
Centrifuge Modeling of Landfill Composite cover Systems
Divya, P.V. (author) / Viswanadham, B.V.S. (author) / Gourc, J.P. (author)
2013
9 Seiten, Bilder, Quellen
Conference paper
Storage medium
German
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