한국지반공학회:학술대회논문집 (Proceedings of the Korean Geotechical Society Conference)
- 한국지반공학회 2008년도 추계 학술발표회
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- Pages.1712-1716
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- 2008
준설매립 초연약지반의 압밀침하 거동 및 계측 사례
Case history in prediction of consolidation settlement and monitoring
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Jeon, Je-Sung
(Korea Water Resources Corporation, KIWE) ;
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Lee, Jong-Wook
(Korea Water Resources Corporation, KIWE) ;
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Im, Eun-Sang
(Korea Water Resources Corporation, KIWE) ;
- Kim, Jae-Hong (Korea Water Resources Corporation, KIWE)
- 발행 : 2008.10.10
초록
Performance of ground improvement project using prefabricated vertical drains of condition, in which approximately 10m dredged fill overlies original soft foundation layer in the coastal area has been conducted. From field monitoring results, excessive ground settlement compared to predicted settlement in design stage developed during the following one year. In order to predict the final consolidation behavior, recalculation of consolidation settlements and back analysis using observed settlements were conducted. Field monitoring results of surface settlements were evaluated, and then corrected because large shear deformation was occurred by construction events in the early stages of consolidation. To predict the consolidation behavior, material functions and in-situ conditions from laboratory consolidation test were re-analyzed. Using these results, height of additional embankment is estimated to satisfy residual settlement limit and maintain an adequate ground elevation. The recalculated time-settlement curve has been compared to field monitoring results after additional surcharge was applied.