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Effects of Ground Improvement Depending on the Type of Soil by Compaction Grouting System  

Chun, Byung-Sik (한양대학교 토목공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.6, no.3, 2002 , pp. 211-220 More about this Journal
Abstract
CGS(Compaction Grouting System) is widely used in reinforcement of structural foundation and ground improvement in soft ground. But the effects of ground improvement depending on the type of soil must be studied in order to adopt in various soils (granular soil and cohesive soil). In this study, characteristics of ground improvement (the increase of N value, increase in unit weight, vertical displacement on the ground surface) by CGS method was compared through two cases that were performed in granular and cohesive soil. The results show that the closer to the grout hole, the more increase in N value and this trend appear distinctly in granular soil. Unit weight of ground increase largely near by the grout hole and decrease in far from it independently of the soil type. The vertical displacement on the ground surface appeared in smaller area in case of granular soil than cohesive soil.
Keywords
CGS; Low Slump Mortar Grout; Ground Improvement;
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