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Publication Details Singh, M., Indraratna, B., Rujikiatkamjorn, C. & Kelly, R. (2020). Cyclic response of railway subgrade prone to mud pumping. Australian Geomechanics Journal, 55 (1), 43-54. Abstract © 2020 Australian Geomechanics Society. All rights reserved. Given the fast pace of growth in today s world, the need for a cost-effective and sustainable mode of transportation is indispensable. Railways provide a mode of mass transportation which facilitates travel between two places. Rails are often laid on subgrade soils with difficult conditions such as low bearing capacity, and high groundwater tables, etc., so when trains pass over these challenging ground conditions, the subgrade softens into a slurry and starts pumping the fines into the upper ballast layers. In Australia, this phenomenon is commonly known as mud pumping or mud holes. This paper investigates the cyclic response of subgrade prone to mud pumping. It is observed that the cyclic stress ratio (CSR) has a thresh

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