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http://dx.doi.org/10.7843/kgs.2007.23.8.47

Improvement Scheme of Simplified Liquefaction Potential Evaluation for a Dredged and Reclaimed Ground  

Jung, Min-Hyung (Dept. of Civil Engrg., The Univ. of Seoul)
Kim, Ju-Hyun (R-geo E&C Co. Ltd)
Jeong, Sang-Guk (Dept. of Civil Engrg., Songwon College)
Lee, Song (Dept. of Civil Engrg., The Univ. of Seoul)
Publication Information
Journal of the Korean Geotechnical Society / v.23, no.8, 2007 , pp. 47-57 More about this Journal
Abstract
In this study, the analysis of density characteristics of some dredged and reclaimed ground sites, which is necessary for liquefaction evaluation of a dredged and reclaimed ground, was conducted. From analyzing a simplified liquefaction potential evaluation using SPT-N values which have been applied as domestic earthquake-resistant design criterion, improvement scheme is suggested. Based on the analysis result of density characteristics, it was found out that the relative density and the intial N-value ranged respectively $40{\sim}50%\;and\;5{\sim}8$. In the case of applying Liao & Whitman's equation to correct effective overburden pressure, liquefaction resistance of the upper ground that is relatively weaker than that of lower ground is overestimated. So, Skempton's equation is recommended. And the N value with depth which is applied for design process should be estimated by the exponential equation, $N=1.35{\sigma}.
Keywords
Correction effective overburden pressure; Initial N value; Liquefaction potential evaluation; Liquefaction resistance;
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