Water Science and Engineering 2008, 1(1) 44-62  DOI:   10.3882/j.issn.1674-2370.2008.01.006   ISSN: 1674-2370 CN: 32-1785/TV

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Keywords
landfills
failure
wedge
leachate level
seepage
shear strength
cohesion
Authors
Qian Xuede
PubMed
Article by

Limit equilibrium analysis of translational failure of landfills under different leachate buildup conditions

Qian Xuede

Michigan Department of Environmental Quality, Waste and Hazardous Materials Division, Lansing, Michigan 48913, U.S.A.

Abstract

Excessive leachate levels in landfills can be a major triggering mechanism for translational failure. The scope of this paper is to present the development of the calculation methods for limit equilibrium analysis of translational failure of landfills and the effects of parametric variation on the factor of safety (FS) of landfills under different leachate buildup conditions. During the development of the calculation methods, 4 leachate buildup conditions are considered. The FS for an interface with high friction angle and low apparent cohesion generally drops much more quickly when leachate levels are increased than that for an interface under inverse conditions. The critical interface of a multilayer liner system with the lowest FS for the entire waste mass can shift from one to another with changes in the leachate levels. The different interfaces of a multilayer liner will have different FS-values under different leachate buildup conditions.

Keywords landfills   failure   wedge   leachate level   seepage   shear strength   cohesion  
Received 2008-01-14 Revised 2008-03-02 Online:  
DOI: 10.3882/j.issn.1674-2370.2008.01.006
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Corresponding Authors: Qian Xuede
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