Abstract
This paper reports a study of vacuum dewatering using horizontal geosynthetic drainage blankets as a more economical and effective method of reclamation using layers of dredged material. Laboratory tests were carried out on samples from two different sites in eastern China, Qingdao City and Lianyungang City. The study showed that the method is feasible and results in a significant time saving as the construction of the dyke, dredging of the fill and consolidation can be done in a successive process. Using geosynthetics as the drainage material allows vacuum dewatering in areas where sand is lacking. The strength and stability of the muck is also enhanced by the placement of horizontal geosynthetic drainage blankets.
Résumé
La présente dissertation est consacrée à l’étude sur la déshydratation sous vide en mettant œuvre les couvertures horizontales de drainage en géosynthétique. Cette méthode de restauration des sols est considérée comme plus économique et plus efficace en utilisant des couches de résidu de dragage. Les tests laboratoires ont été effectués sur des échantillons provenant de deux sites différents dans l’est de la Chine, soit la ville de Qingdao et la ville de Lianyungang. L’étude a montré que la méthode est faisable et que les résultats requis dans les meilleurs délais tels que la construction de digue, la drague de remplissage et la consolidation peuvent être réalisés dans un processus successif. L’utilisation des géosynthétiques comme matériels de drainage permet d’appliquer la déshydratation sous vide dans des zones où le sable fait défaut. La force et la stabilité des déblais seront également renforcées par la mise en œuvre des couvertures horizontales de drainage en géosynthétique.
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Acknowledgements
The author would like to thank the researchers in the soil testing laboratory at the Nanjing Hydraulic Research Institute who helped with the undertaking of the laboratory tests. This work has been funded by CNNSF through grant No. 40572156 and No. 40372122. This work also has been supported by China Postdoctoral Science Foundation No. 20060390519.
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Li, L.H., Wang, Q., Wang, N.X. et al. Vacuum dewatering and horizontal drainage blankets: a method for layered soil reclamation. Bull Eng Geol Environ 68, 277–285 (2009). https://doi.org/10.1007/s10064-009-0200-7
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DOI: https://doi.org/10.1007/s10064-009-0200-7