System Reliability Framework for Design of MSE Walls for Vertical Expansion of MSW Landfills

Mahapatra, Shilpi and Basha, B. Munwar and Manna, Bappaditya (2021) System Reliability Framework for Design of MSE Walls for Vertical Expansion of MSW Landfills. Journal of Hazardous, Toxic, and Radioactive Waste, 25 (1). 04020060. ISSN 2153-5493

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In the past few decades, waste generation has increased significantly in India, as well as across the globe. Therefore, to avoid the acquisition of new landfill sites, vertical expansion of existing municipal solid waste (MSW) landfills is a requirement of the present scenario. Owing to the heterogeneous nature of waste and varying degrees of decomposition in MSW, the conventional practices to calculate safety margins may not be suitable to handle the variability of the design parameters. Therefore, a system reliability framework is proposed for the optimum design of mechanically stabilized earth (MSE) retaining walls against external failure modes. The properties associated with MSW landfills, their foundation soil, and MSE walls are considered as random variables. The overturning, sliding, and bearing capacity failure modes are considered using a three-part wedge mechanism. The design charts are provided to obtain the adequate length of the reinforcement and the dimensions of the MSE wall. For satisfactory performance of the MSE wall, the minimum ratio of the length of the reinforcement to the height of the MSE wall should be 0.55 to 0.6 when an additional waste mass is placed on the existing height of the landfill.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Article
Uncontrolled Keywords: bearing capacity; decomposition analysis; design; expansion; landfill; municipal solid waste; reliability analysis; retaining wall; safety;Design parameters; Foundation soils; Mechanically stabilized earth; Municipal solid waste landfills; Optimum designs; System reliability; Waste generation; Wedge mechanisms
Subjects: Civil Engineering
Divisions: Department of Civil Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 31 Jul 2021 06:44
Last Modified: 04 Mar 2022 10:26
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