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http://dx.doi.org/10.12814/jkgss.2018.17.3.001

Numerical Analysis on the Behavior of Revetment Reinforced by Sand Compaction Pile According to Area Replacement Ratio  

Kim, Byoung-Il (Dept of Civil and Environmental Engineering, Myongji University)
Bong, Tae-Ho (Institute of Construction and Environmental Engineering, Seoul Univ.)
Han, Jin-Tae (Center of Seismic Safety Research, Korea Institute of Civil Engineering & Building Technology)
Jang, Young-Eun (UEE Research Institute, UNIST)
Publication Information
Journal of the Korean Geosynthetics Society / v.17, no.3, 2018 , pp. 1-8 More about this Journal
Abstract
Sand compaction pile (SCP) is a ground improvement method which is used to secure the stability of the soft ground by using a type of replacement pile filled with coarse grained material. The behavior characteristics of the SCP, which is frequently used for improving both the onshore and offshore ground, is governed by the ground condition, the installation method, and replacement ratio. Therefore, the stability of the SCP in terms of the bearing capacity and displacement needs to be evaluated considering both the design values and in-situ conditions of construction site. In this study, numerical analysis is carried out based on the conditions of 00 revetment construction site in South Korea where unexpected displacement occurred during construction of SCP. Based on the analysis results, the displacement of the revetment structure according to the replacement ratio of the SCP was compared to the result calculated from design formulas. The results showed that the lateral displacement can be exceeded the reference value from proposed criteria regardless of increased replacement ratio of SPC. It is also confirmed that the behavior of the structure according to the replacement ratio of SPC in not reflected in the existing calculation methods. Therefore, the stability of the SCP composite ground should be examined through the site inspection after the SCP construction.
Keywords
Sand compaction pile; SCP method; Area replacement ratio; Revetment structure; SCP composite ground;
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