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Conference Papers Year : 2014

Systematic methodology for characterization of suffusion sensibility

Abstract

The complex phenomenon of suffusion corresponds to the process of detachment and then transport of the finest particles within the soil porous network. Suffusion may cause changes in porosity and can also lead to important modifications in the hydraulic and mechanical characteristics of the soil.With the aim to evaluate the likelihood of suffusion initiation, several criteria based on the study of grain size distribution have been proposed in the literature. The most successful criteria are identified for each type of grain size distribution in order to estimate the susceptibility of suffusion. For the characterization of soil suffusion sensibility, two specific devices were designed and tests were performed on cohesionless granular matter and on clayey sand with different fine particle contents.We propose to characterize the hydraulic loading from the energy dissipated by the seepage flow and to characterize the soil response by the cumulative eroded dry mass. We define the erosion resistance index as the ratio of eroded dry mass to energy dissipated by the seepage flow. For the tested soils, this erosion resistance index leads to a similar erodibility classification for different hydraulic loading histories. These results demonstrate that this approach is efficient to characterize suffusion development for cohesionless granular matter and clayey sand.
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Dates and versions

hal-04470991 , version 1 (21-02-2024)

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Didier Marot, Abdoul Rohim, Nguyen Hong Nguyen, Fateh Bendahmane, Luc Sibille. Systematic methodology for characterization of suffusion sensibility. International Conference on Scour and Erosion (ICSE), Dec 2014, Perth, Australia. pp.213-223, ⟨10.1201/b17703-2⟩. ⟨hal-04470991⟩
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