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http://dx.doi.org/10.12814/jkgss.2017.16.3.063

The Behavior on Stress and Settlement of GCP Composite Ground with Different Shear Strength of Soil  

Na, Seung-Ju (Dept. of civil Engineering, College of Engineering, Chosun University)
Kim, Daehyeon (Dept. of civil Engineering, College of Engineering, Chosun University)
Kim, Gyeong-Eop (Dept. of civil Engineering, College of Engineering, Chosun University)
Publication Information
Journal of the Korean Geosynthetics Society / v.16, no.3, 2017 , pp. 63-74 More about this Journal
Abstract
Although the Granular Compaction Pile (GCP) has been used for many decades, several failures still occur such as bulging, shear failure and other phenomena, indicating that more refined study is needed. The main objective of the study is to evaluate the stress concentration ratio for both area replacement ratio and shear strength of soil through literature review and numerical analysis. Numerical analysis using the finite element program ABAQUS has been performed for the composite ground with GCP. The behavior stress and settlement of composite ground have been analyzed for both the area replacement ratio (10~40%) and shear strength of soil (25~75 kPa). As a result of numerical analysis, as the soil strength and area replacement ratio increased, the average stree related coefficient and stress concentration ratio for depth tended to decrease, and stress related coefficient of upper layer tend to decrease equally, but the stress concentration ratio decreased. Therefore, tendency that the value in th upper layer differs from the value in other depths was displayed. Care should be taken because it is possible to make mistakes in designing the entire composite ground with the values measured in the upper layer. Also, the settlement reduction factor was compared with the existing equation and numerical analysis. And the value obatined from the existing equation and numerical analysis are similar.
Keywords
GCP method; Vertical effective stress; Area replacement ratio; Shear strength of soil; Settlement reduction factor;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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