Abstract
Seismic loads may damage municipal solid waste (MSW) landfills through the relative movements within the landfill system. These movements can disrupt performance of drainage and gas collection systems, thereby resulting in environmental pollution. The smooth synthetic materials might be placed beneath the structures to provide seismic protection by absorbing the imparted energy of earthquakes through the sliding mechanism. It has been found that a high strength geomembrane placed over the other smooth and lubricated geomembrane sheets constitutes an efficient seismic liner. In the present study, experimental investigations were conducted to evaluate role of in-soil base isolation on seismic response of the Tehran MSW landfill. Results of geophysical and geotechnical investigations in the landfill site are presented in detail. Shaking table tests were conducted on the MSW embankment isolated by semi-elliptic shaped liners and subjected to harmonic sinusoidal base excitations. The results for the isolated and non-isolated cases are compared in terms of permanent displacement and seismic response. It has been observed that at all elevations the spectral accelerations within the waste decreased by base isolation, especially for the more intense excitations. Results of the present study demonstrate a suitable application of geosynthetic liners for seismic retrofitting of landfills.
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Abbreviations
- EPA:
-
Environmental protection agency
- HDPE:
-
High-density polyethylene
- LCS:
-
Leachate collection systems
- MHA:
-
Maximum horizontal acceleration
- MSW:
-
Municipal solid waste
- MSWLF:
-
Municipal solid waste landfill
- OII:
-
Operating Industries, Inc
- Sa/(a max)max :
-
Maximum spectral amplification
- T m :
-
Mean period
- T s :
-
Fundamental period of system
- UHMWPE:
-
Ultrahigh molecular weight polyethylene
- λ :
-
Scaling factor
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Acknowledgements
The present research was funded by a grant from the Tehran Urban Planning and Research Center of Tehran’s municipality. In this way, the present paper was conducted with the cooperation of the management and technicians of the burial division in Kahrizak landfill facility, and Laboratory of Physical Modeling of Geotechnical Engineering Research Center (School of Civil Engineering, Tehran University). The authors also wish to thank IBA Group in provision of used geosynthetics. The authors of the present paper sincerely acknowledge kind cooperation of all these people.
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Mirhaji, V., Jafarian, Y., Baziar, M.H. et al. Seismic in-Soil Isolation of Solid Waste Landfill Using Geosynthetic Liners: Shaking Table Modeling of Tehran Landfill. Int J Civ Eng 17, 205–217 (2019). https://doi.org/10.1007/s40999-017-0232-5
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DOI: https://doi.org/10.1007/s40999-017-0232-5