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Consolidation Settlement of Capped Sediment (II): Advective Transport of Pore Water and Analytical Prediction of Settlement  

Kim, Tae-Hyung (Chung-Ang Univ., Dept. of Civil and Environ. Engrg.)
Hong, Won-Pyo (Chung-Ang Univ., Dept. of Civil and Environ. Engrg.)
Moo-Young, Horace-K (Lehigh Univ., Dept. of Civil and Environ. Engrg.)
Publication Information
Journal of the Korean Geotechnical Society / v.19, no.3, 2003 , pp. 39-44 More about this Journal
Abstract
Centrifuge test was conducted to simulate the effects of consolidation settlement of capped contaminated marine sediment. A fluorescent dye was used to monitor the movement of pore water through the cap layer. Dye tracer study clearly showed the consolidation induced advective transport of contaminants. Thus, the capping layer must be appropriately designed to reduce the effects of consolidation induced advective transport. The results from the centrifuge test were compared to predictions made by the Primary consolidation, Secondary compression, and Desiccation of Dredged Fill (PSDDF) computer program, which can qualitatively estimate the consolidation settlement of capped marine sediment. Although PSDDF approximated closely the secondary compression in the centrifuge test (i.e., compare data points from 18 to 25 prototype years), the maximum deviation between centrifuge test result and PSDDF prediction was 20 % about prototype time 6 years. Thus, designers should utilize PSDDF consolidation settlement results with caution.
Keywords
Advection; Capping; Consolidation; PSDDF; Sediment; Settlement;
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