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Case Study of Stress Concentration Ratio of Composite Ground Improved by Deep Cement Mixing Method

심층혼합처리공법으로 개량된 복합지반의 응력분담비에 대한 사례 연구

  • Yoo, Wan-Kyu (Department of Civil and Environmental Engineering, Myongji University) ;
  • Kim, Byoung-Il (Department of Civil and Environmental Engineering, Myongji University) ;
  • Kim, Young-Uk (Department of Civil and Environmental Engineering, Myongji University)
  • 유완규 (명지대학교 토목환경공학과) ;
  • 김병일 (명지대학교 토목환경공학과) ;
  • 김영욱 (명지대학교 토목환경공학과)
  • Received : 2012.04.05
  • Accepted : 2012.07.12
  • Published : 2012.07.31

Abstract

Deep cement mixing method (DCM) is one of the most effective improving methods for deep soft ground. The strength of soft soil can be increased in a short period of time with less noise and vibration. However, it is necessary to determine the stress transferring and concentration ratio of the composite soft ground for estimating the settlement behaviors. In this study, a model test was undertaken to investigate the stress distribution of the improved soil. Results of the model test shows that stresses were concentrated mainly on the improved areas by DCM and the concentration ratios (35.4, 28.6, 27.02) were obtained using several different techniques. These were well in accordance with other previous research results (26.52, 32.5).

Keywords

Soft ground;deep cement mixing(DCM);Stress concentration ratio;Loading test;Composite ground

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