Abstract
Utilization of pond ash in large earthworks for geotechnical applications like construction of highway embankments, raising of ash dykes and filling low lying areas (construction fills), solves the waste disposal problem besides conserving the natural soils. However, design and construction of such geotechnical structures particularly in earthquake prone areas, requires thorough understanding of dynamic response of these structures under different seismic loading conditions. Here in this article, dynamic stability of embankments raised around the perimeter of ash ponds by the upstream and down stream methods of construction with coarse (ash from inflow point) and fine (ash from outflow point) pond ash materials, has been computed for different site specific earthquake scenarios appropriate for Delhi region. The performance of the embankments is analyzed using Quake/w and Slope/w software packages for steady-state seepage condition. The required dynamic properties of the materials are obtained form the various field and laboratory tests. The geotechnical structures constructed with ash exhibited similar type of response as that of with the natural soils. The performance of the structures is influenced by number factors such as type of construction (e.g. upstream or downstream), insitu conditions (e.g. stresses, density, phreatic line), and magnitude of dynamic loads, besides on the static and dynamic characteristics of the materials. The structures with the fine ash exhibit higher vulnerability to liquefaction related failures, which emphasizes need for carrying site-specific studies and adoption of proper construction measures to ensure design parameters.
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Authors are grateful to the both anonymous reviewers for their thorough scrutiny and valuable suggestions, which improved the article significantly.
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Jakka, R.S., Ramana, G.V. & Datta, M. Seismic Slope Stability of Embankments Constructed with Pond Ash. Geotech Geol Eng 29, 821–835 (2011). https://doi.org/10.1007/s10706-011-9419-8
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DOI: https://doi.org/10.1007/s10706-011-9419-8