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http://dx.doi.org/10.12814/jkgss.2018.17.1.127

Analysis of Behavior on GCP Composite Ground Considering Loading and Foundation Conditions  

Kim, Gyeong-Eop (Department of Civil Engineering, Chosun Univ.)
Park, Kyung-Ho (Head of Research Center, SOIL-ROCK E&C Co., Ltd.)
Kim, Dae-Hyeon (Department of Civil Engineering, Chosun Univ.)
Publication Information
Journal of the Korean Geosynthetics Society / v.17, no.1, 2018 , pp. 127-137 More about this Journal
Abstract
Gravel Compaction Pile (hereinafter referred to as GCP) is a ground improvement technique by packing crushed stones on fragile clay ground, pressing it, and forming stakes on the foundation. Although many researchers have analyzed stress behavior of GCP composite ground on domestic GCP technique using laboratory experiment and field experiment, analyses of stress behavior according to the difference of stiffness of mat foundation loaded on the upper foundation of GCP composite ground have not been done actively. Therefore, this study aimed to identify the stress concentration ratio in accordance with the difference of basis stiffness by interpreting figures. To perform this, replacement ratio was changed and modelled using ABAQUS, software for finite element analysis and analyzed the stress concentration ratio, amounts of settlement, and maximum amounts of horizontal displacement of composite ground in accordance with the difference of stiffness. An analysis showed that the stress concentration ratio of rigid foundation was highly assessed than unloading of flexible foundation in case of unloading, while amounts of settlement under flexible unloading condition were slightly higher than under rigid condition. This indicates that the characteristic of stress behavior on the different stiffness of upper foundation needs to be clarified. In addition, the maximum horizontal displacement was generated in a constant level regardless of the difference of stiffness.
Keywords
GCP; Area replacement ratio; Loading condition; Stress concentration ratio; Lateral displacement; Settlement;
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