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Effect of apparent cohesion on translational failure analyses of landfills
Journal article   Peer reviewed

Effect of apparent cohesion on translational failure analyses of landfills

Xuede Qian and Robert M. Koerner
Journal of geotechnical and geoenvironmental engineering, v 130(1), pp 71-80
Jan 2004

Abstract

case studies disposal barriers Engineering geology equations equilibrium failures friction gravity sliding landfills mathematical methods models movement prediction safety shear strength simulation slope stability waste disposal
The scope of this paper is to develop a new analysis method introducing the effect of apparent cohesion of the waste and/or liner materials on the translational failure of landfills. The apparent cohesion of the liner materials seriously affects the factor of safety (FS), especially for a liner interface with a low friction angle and high apparent cohesion. Obtaining accurate and reliable apparent cohesion for various liner materials becomes an important approach for translational failure analysis. The relationship between B and FS (sub ave) for c>0 is different with that for c = 0. Using an equivalent friction angle to represent the apparent cohesion of the liner materials may lead to an unsafe result. Also, a waste filling sequence, to keep the FS above a stipulated value during the landfilling process, can be generated. The values of FS (sub V) /FS (sub ave) varies between 1.9 and 2.1 and are concentrated around 2.0 when FS (sub ave) > or =0.95. The approximate solutions of FS with adequate accuracy can be obtained by assuming FS (sub V) = 2.0.FS when FS> or =0.95.

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57 citations in Scopus

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Web of Science research areas
Engineering, Geological
Geosciences, Multidisciplinary
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