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Analytical solutions for protective filters based on soil-retention and permeability criteria with respect to the phenomenon of soil boiling

Srivastava, Amit and Babu, Sivakumar GL (2011) Analytical solutions for protective filters based on soil-retention and permeability criteria with respect to the phenomenon of soil boiling. In: Canadian Geotechnical Journal / Revue Canadienne de Géotechnique, 48 (6). pp. 956-969.

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Official URL: http://www.nrcresearchpress.com/doi/abs/10.1139/t1...

Abstract

For the successful performance of a granular filter medium, existing design guidelines, which are based on the particle size distribution (PSD) characteristics of the base soil and filter medium, require two contradictory conditions to be satisfied, viz., soil retention and permeability. In spite of the wider applicability of these guidelines, it is well recognized that (i) they are applicable to a particular range of soils tested in the laboratory, (ii) the design procedures do not include performance-based selection criteria, and (iii) there are no means to establish the sensitivity of the important variables influencing performance. In the present work, analytical solutions are developed to obtain a factor of safety with respect to soil-retention and permeability criteria for a base soil - filter medium system subjected to a soil boiling condition. The proposed analytical solutions take into consideration relevant geotechnical properties such as void ratio, permeability, dry unit weight, effective friction angle, shape and size of soil particles, seepage discharge, and existing hydraulic gradient. The solution is validated through example applications and experimental results, and it is established that it can be used successfully in the selection as well as design of granular filters and can be applied to all types of base soils.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to NRC Research Press.
Keywords: analytical;soil retention;permeability;granular filter; safety factor;hydraulic gradient;seepage
Department/Centre: Others
Date Deposited: 15 Sep 2011 11:09
Last Modified: 15 Sep 2011 11:09
URI: http://eprints.iisc.ernet.in/id/eprint/40465

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