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http://dx.doi.org/10.15683/kosdi.2018.09.30.305

LandAnalysis of Effective Depth of Dynamic Replacement Method  

Kim, Sung-Hwan (Dept. of Civil and Environmetal Eng., Incheon National Univ)
Publication Information
Journal of the Society of Disaster Information / v.14, no.3, 2018 , pp. 305-314 More about this Journal
Abstract
Purpose: Dynamic Replacement Method currently lacks of sufficient research, implementation cases, and case histories, compared with other comparable methods, such as Dynamic Compaction Method. Method: In this study, for Dynamic Replacement Method, the effective improvement depth and improved strength were analyzed for silty clayey soils. Results: Testbed test was performed to verify the effectiveness of Dynamic Replacement Method followed by the main dynamic replacement implementation on real construction site. Conclusion: A The effects of changes of soft ground depth, dynamic replacements' diameter, depth, spacing, and applied energy on dynamic replacement efficiency in silty clays were assessed and the followings were found: Empirical coefficient for soil $n_R$ of Dynamic Replacement Method was within the range of 0.14~0.32 and its ${\sqrt{WH}}$ is recommended to be 1.25~2.5 times of those from Dynamic Compaction Method.
Keywords
Dynamic Replacement Method; Ground Improvement; Drop Height; Applied Energy; Dynamic Compaction Method;
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