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Characteristics of Bearing Capacity of Soft Ground Reinforced by Vertical Mat  

Shin, Eun-Chul (인천대학교 토목환경공학과)
Lee, Gil-Ho (케이에스엠(주))
Publication Information
Journal of the Korean GEO-environmental Society / v.13, no.6, 2012 , pp. 83-90 More about this Journal
Abstract
Generally, the effect of the cement deep mixing method on the improvement of clay ground is far greater than the effect of physical improvement. Although it leads to great improvement strength in the initial stage, there are not many constructional precedents in Korea and it is hard to manage quality according to the cement-clay mixing method. In order to figure out the strength characteristics according to the mixing ratio of cement, sand, and clay and the improvement characteristics of weak ground according to the forms of the specimens to be improved, marine clay was used in this study to conduct the uniaxial compression test and soil bin model test. The test piece specimens for the uniaxial compression test were mixed with sand in a fixed ratio with the criterion of the water cement ratio. The cement was mixed with clay in the ratios of 10%, 20%, 30%, and 40% to the clay weight. The moisture content of the soil ground was made in the ratios of 40%, 60%, and 80%. The test piece specimens went through curing by moistening for 7, 14, and 28 days and underwent the uniaxial compression test according to the curing period. For the bearing test, the soil bin models were made and the ground improved in the Mat type was formed. After that, the bearing strength was compared in this study according to the improvement ratio and analyzed the intervening effect between the walls of the improved specimens.
Keywords
Soft ground improvement; Laboratory model test; Uniaxial compression test; Mixing ratio; Improvement ratio;
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