Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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A Study on the Effectiveness of Injection in Environmentally-Friendly Bio-grouting with Soil Conditions

지반조건에 따른 친환경 바이오그라우팅 주입 효과에 관한 연구

  • Kim, Daehyeon (Department of Civil Engineering, Chosun University) ;
  • Park, Kyung-Ho (Department of Civil Engineering, Chosun University) ;
  • Kim, Min-Seok (Department of Civil Engineering, Chosun University) ;
  • Kim, Sun-Hak (Department of Civil Engineering, Chosun University)
  • Received : 2015.03.23
  • Accepted : 2015.06.11
  • Published : 2015.06.30
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Abstract

The purpose of this research is to identify the effectiveness of injection with soil conditions by injecting CaCO3(created by microorganism reaction), which was recreated with equipment in similar situ condition. To analyze our research, we made 2 cases of single-layer (SP, SW) in D 150mm ${\times}$ H 300mm. Layers were made by RC 70, 80, 85, 90, 95% of soil condition. We measured uniaxial compression strength with cone penetrometer and watched injection range by checking a bulb formation around the injection nozzle. As a result, the relative compaction(RC) in more 85% were not injected in SW, we could identify the effect of bio-grouting technology on ground in relative compaction(RC) of injection ratio and cementation range.

본 연구에서는 미생물 반응으로 생성된 탄산칼슘을 현장에서 활용되고 있는 주입장비와 유사하게 제작하여 모래지반에 주입함으로 지반조건에 따른 주입범위 및 주입효과를 확인하고자 하였다. 본 연구를 위해 2종류의 단층토(SP, SW)를 D 150mm ${\times}$ H 300mm의 모형토조에 상대다짐도 80, 85, 90, 95%로 제작하여 주입실험을 수행하였다. 주입 후 강도개선효과를 확인하기 위해 일축압축강도를 측정하였고, 주입노즐 주변의 구근형성을 통해 주입범위를 살펴보았다. 그 결과, SW시료는 상대다짐도 85% 이상에서 주입률이 10% 이하로 나타났으며, 지반의 상대다짐도에 따라 Bio-grouting의 주입률 및 고결범위에 영향이 있음을 확인 할 수 있었다.

Keywords

References

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