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http://dx.doi.org/10.14481/jkges.2020.21.9.15

The Study on the Stress Concentration Ratio of Low Slump Mortar Grouting Mixtures for Improving the Soft Ground  

Park, Eonsang (Department of Construction System Engineering, Soongsil Cyber University)
Kim, Byungil (Institute of Technology, Expert Group for Earth & Environment)
Park, Seungdo (HanYoung Construction and Technology)
Publication Information
Journal of the Korean GEO-environmental Society / v.21, no.9, 2020 , pp. 15-24 More about this Journal
Abstract
In this study, the stress concentration ratio for the improved material of the low slump mortar grouting was evaluated through the composite ground method, the ground arching theory, the plastic angle method, the 2D and 3D numerical analysis and the 3D model experiment. The stress concentration ratio calculated by the composite ground method was 89.3, 3.75~59.0 when the three-dimensional ground arching theory was applied, and 82.8 for the three-dimensional plastic angle method. As a result of the 2D numerical analysis, the stress concentration ratio was 63.0~77.0, which was found to increase as the improvement ratio increased. The results of 3D numerical analysis were predicted to be 50.0~56.0 smaller than the results of 2D analysis. In the case of a special model experiment using a large triaxial compression cell, the stress concentration ratio for each load step was 53.0~60.0, and the stress concentration ratio evaluated by the experiment was measured within 2D and 3D numerical analysis predictions. In this study, a predictive equation for the stress concentration ratio according to the improvement ratio is proposed based on the analysis and experimental values for the improved ratio of the low slump mortar grouting.
Keywords
Soft ground; Low slump mortar; Stress concentration ratio; Ground improvement;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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