Novel self-filtration criteria for suffusion assessment

To, Huu Duc, and Scheuermann, Alexander (2014) Novel self-filtration criteria for suffusion assessment. In: Proceedings of the 10th ANZ Young Geotechnical Professional’s Conference (10-12 September 2014) pp. 205-211. From: 10th Young Geotechnical Professional’s Conference, 10-12 September 2014, Noosa, QLD, Australia.

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Suffusion is one major reason for the creation of sinkholes and dysfunctions of hydraulic structures. When suffusion occurs, fine soil grains are mobilized and dislodged by seepage flow. There are two types of suffusion assessment methods, developed based on the consideration of self-filtration processes: (1) quick and easy-to-use correlation methods, which correlate some specific and characteristic sizes of the grain size distribution (GSD) to ensure that coarse grains are capable of keeping fine grains in place regardless of the seepage flow; and (2) separation methods, which divide the GSD of soils into two separated fractions, primary fabric and loose grains, before specific filter criteria are used for the GSDs of the both fractions. This study presents two novel approaches in both of the above introduced groups. The first approach acknowledges the fact that suffusive soils are often characterized with a steep slope in the coarse fraction and a flat slope in the fine fraction of the GSD. This assessment approach assesses the suffusion potential of a soil via the farthest distance a GSD can go from its mean line, i.e. how hard it is kinked. The second approach suggests a new way to separate soil primary fabric from loose grains taking into account the fact that there is an overlapping zone between the both fractions. Both criteria show a good coherence with data from experimental studies.

Item ID: 46005
Item Type: Conference Item (Research - E1)
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Date Deposited: 02 Nov 2017 00:16
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering @ 100%
SEO Codes: 87 CONSTRUCTION > 8702 Construction Design > 870201 Civil Construction Design @ 100%
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