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Effect of cohesion and fill amplification on seismic stability of municipal solid waste landfills using limit equilibrium method

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Title Effect of cohesion and fill amplification on seismic stability of municipal solid waste landfills using limit equilibrium method
 
Creator SAVOIKAR, P
CHOUDHURY, D
 
Subject retaining wall
failure
cohesion
limit equilibrium
msw landfills
seismic stability
pseudo-dynamic method
 
Description Municipal solid waste (MSW) landfills in seismic zones are subjected to the seismic forces both in the horizontal and vertical directions. The stability of landfills against these seismic forces was evaluated by computing the factor of safety of landfills with different modes of failure among which failures of landfills due to translation are very common. Conventionally, the seismic stability of landfill is evaluated by using pseudo-static limit equilibrium method. In the present study, seismic stability of landfills is evaluated by both the conventional pseudo-static and modern pseudo-dynamic method. The pseudo-dynamic method is superior as it takes into account the effect of duration and frequency of earthquake motion and corresponding body waves in addition to the variation of earthquake accelerations along depth and time. In the present study, the effects of cohesion and fill amplification on seismic stability of landfill are also taken into account. It was noticed that, neglecting cohesion of fill material as well as liner material, results in a lower factor of safety and, hence, a very conservative/uneconomic design. Also, fill amplification is found to reduce the factor of safety values computed only by using the pseudo-dynamic method, showing its advantage. Generalized expressions are developed for factor of safety and yield acceleration against translational failure, which can be used for evaluating the seismic stability of MSW landfills. Comparisons of results under static condition with existing, similar methodology show a very good agreement. However, the present study seems to provide unique results for the seismic case.
 
Publisher SAGE PUBLICATIONS LTD
 
Date 2011-08-29T01:27:30Z
2011-12-26T12:58:18Z
2011-12-27T05:47:59Z
2011-08-29T01:27:30Z
2011-12-26T12:58:18Z
2011-12-27T05:47:59Z
2010
 
Type Article
 
Identifier WASTE MANAGEMENT & RESEARCH, 28(12), 1096-1113
0734-242X
http://dx.doi.org/10.1177/0734242X09348531
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11905
http://hdl.handle.net/10054/11905
 
Language en