Kalore, S and Sivakumar Babu, GL (2023) Recent developments in design criteria for granular and geotextile filters. In: 4th African Regional Conference on Geosynthetics - Geosynthetics in Sustainable Infrastructures and Mega Projects, GeoAfrica 2023, 20-23 February 2023, Cairo.
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Abstract
Granular and geotextile filters are commonly provided in several hydrological infrastructures to limit soil erosion and allow unimpeded water seepage. The success of a filter depends on forming a bridging structure, which is governed by the grain size distribution of soil and the constriction size distribution of filter. Currently, the retention requirement is satisfied considering representative grain and opening size, whereas the hydraulic conductivity requirement is satisfied considering empirical factors for avoiding excessive clogging. In this paper, the design criteria for granular and geotextile filters are reviewed, and improved design criteria are presented. A probabilistic retention criterion is developed, considering the grain size and constriction size as random variables. The influence of filter thickness is incorporated into the criterion by considering the number of constrictions in a filtration path. A hydraulic conductivity criterion is developed theoretically based on governing flow equations and the expected partial clogging of geotextiles. The limit states for the developed criteria are evaluated based on the wide range of experimental data. The developed design criteria are applicable to granular and nonwoven geotextiles, which offers an improvement in design compared to the existing criteria in practice. © 2023 EDP Sciences. All rights reserved.
| Item Type: | Conference Paper |
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| Publication: | E3S Web of Conferences |
| Publisher: | EDP Sciences |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Department/Centre: | Division of Mechanical Sciences > Civil Engineering |
| Date Deposited: | 30 Mar 2023 06:04 |
| Last Modified: | 30 Mar 2023 06:04 |
| URI: | https://eprints.iisc.ac.in/id/eprint/81167 |
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