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Modeling deformation behaviour of clay liners in a small centrifuge

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Title Modeling deformation behaviour of clay liners in a small centrifuge
 
Creator VISWANADHAM, BVS
MAHESH, KV
 
Subject landfills
municipal solid waste
clay liners
centrifuge modeling
nonuniform settlements
model tests
 
Description In modern solid waste landfills, liner systems are essential structural elements that ensure that waste materials are safely separated from the environment. Many liner systems have been developed and used over the past decade. Among impermeable layers, clay liners are regarded as one of the very significant components of liner system and are being used worldwide as a waste containment system in landfills. One of the failures associated with clay liners is the occurrence of nonuniform settlements, resulting from the sudden collapse of waste, or the decomposition of waste materials, and (or) the subgrade over which the liner is laid. This paper deals with the use of a small centrifuge to model the deformation behaviour of clay liners. Model tests were performed in a small geotechnical centrifuge to investigate the behaviour of clay liners in landfills subjected to nonuniform settlements at sharp curvatures. A parametric study was conducted to analyze the influence of parameters like thickness, consistency, and overburden on the behaviour of clay liners. The clay liner without any overburden is observed to experience severe cracking in the form of deep and wide cracks at the maximum curvature zone. The depth and width of the cracks are found to decrease with an increase in clay liner thickness. The cracking failure pattern is suppressed by shearing for a clay liner with an increase in overburden pressure. Based on model test results, the clay liner with an adequate overburden is found to be free from cracking failure even when subjected to sharp curvatures. The effective usage of a small geotechnical centrifuge to model the deformation behaviour of clay liners is demonstrated adequately.
 
Publisher NATL RESEARCH COUNCIL CANADA
 
Date 2011-08-19T09:05:34Z
2011-12-26T12:56:10Z
2011-12-27T05:44:25Z
2011-08-19T09:05:34Z
2011-12-26T12:56:10Z
2011-12-27T05:44:25Z
2002
 
Type Article
 
Identifier CANADIAN GEOTECHNICAL JOURNAL, 39(6), 1406-1418
0008-3674
http://dx.doi.org/10.1139/t02-075
http://dspace.library.iitb.ac.in/xmlui/handle/10054/10299
http://hdl.handle.net/10054/10299
 
Language en