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Cyclic Simple Shear Testing of Degraded Municipal Solid Waste from California Under Constant Volume and Constant Load Conditions

  • Xunchang Fei
  • Dimitrios Zekkos
Conference paper
Part of the Environmental Science and Engineering book series (ESE)

Abstract

For municipal solid waste (MSW) landfills that are situated in seismically active regions, the response of MSW under dynamic loading is critical to landfill design. In this study, a large-size simple shear device is utilized to perform cyclic testing on MSW under constant load (CL) and constant volume (CV) conditions which are considered equivalent to drained and undrained conditions respectively. The MSW sample was excavated from a California landfill located in a seismically active zone and was fully degraded in the laboratory in controlled conditions. Degraded MSW specimens were compacted and consolidated, and then sheared cyclically using cyclic stress ratios (CSR) of 0.1, 0.2, 0.3 and 0.4 sequentially. For a given number of cycles, higher CSR and higher vertical stress result in higher vertical strain and shear strain under CL conditions, and higher excess pore pressure ratio and shear strain under CV conditions. When subjected to cyclic loading, MSW is found to experience significant vertical strain under CL conditions (i.e., compression), or generate potentially significant pore pressures under CV conditions.

Keywords

Municipal solid waste Simple shear Cyclic loading 

Notes

Acknowledgements

This research was supported by the National Science Foundation (NSF) Division of Computer and Communication Foundations under Grant no. 1442773. Any opinions, findings, conclusions and recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of the NSF.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.School of Civil and Environmental EngineeringNanyang Technological UniversitySingaporeSingapore
  2. 2.Department of Civil and Environmental EngineeringUniversity of MichiganAnn ArborUSA

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