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Quelques aspects de la déshydratation naturelle des sédiments

Abstract : Dredging operations generate large amounts of sediments considered as waste. The civil engineering field offers a number of applications for their re-use. For the most of the applications at the beginning of the process, it is necessary to reduce the water content. The natural drying consists to reduce the water content in the dredging sediment by drainage and evaporation. It is the most economic and acceptable option for the environment. It appears important to optimize drying technique by the use of dewatering ability criteria. A brief recap of some tests are presented. Tests in laboratory and measurements have been be performed with fall-cone vane shear test operated in dry and drainage cells filled with marine and dam sediments (Cherbourg and Honfleur ports, Isère, Durance and Rhin rivers). Dewatering and natural drying are governed with time but also by properties of sediment and by the relation of water content and undrained shear strength (C u-w).
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Beatriz Boullosa Allariz, Daniel Levacher. Quelques aspects de la déshydratation naturelle des sédiments. Journées Nationales Génie Côtier - Génie Civil, Jun 2016, Toulon, France. pp.553-560, ⟨10.5150/jngcgc.2016.061⟩. ⟨hal-01929473⟩

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