Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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Effect of Anti-washout Admixture Implementation on Backfill Aggregates on Underwater Structures

수중 구조물 골재 속채움 시 수중 불분리성 혼화제의 적용 효과

  • Kim, Ukgie (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and building Technology) ;
  • Choi, Changho (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and building Technology) ;
  • Park, Bonggeun (Backyoung G&C Co., Ltd.) ;
  • Li, Zhuang (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and building Technology) ;
  • Cho, Samdeok (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and building Technology)
  • Received : 2014.06.16
  • Accepted : 2014.08.05
  • Published : 2014.09.01
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Abstract

With increasing underwater structure construction, there is high interest in offshore foundation and underwater grout and various study has been done in this area. For grout materials constructed underwater, it may be washed away by water or easily disturbed and material separation phenomenon during curing period always happens. As a result, it is difficult to ensure construction quality and this has a significant influence on the design strength of structure. In this study, to understand application effects of anti-washout admixture for the preplaced construction method, where grout is injected in monopile after filled with aggregates, laboratory tests on bleeding and compressive strength of anti-washout admixture were performed under various test conditions varying size of aggregate, water and cement ratio and admixture, and test results were compared and evaluated.

수중 구조물의 건설공사 수요 증가에 따라 구조물을 지반에 고정시키고 지지하기 위한 해양 기초 및 수중 그라우트재에 대한 관심이 높아지고 있고, 이에 대한 다양한 연구가 진행되고 있다. 수중에 시공되는 그라우트재는 물의 흐름에 의해 유실 교란되기 쉽고 양생 중에 재료분리 현상 등으로 인해 시공품질을 확보하기 어려워 설계 강도에 큰 영향을 미친다. 본 연구에서는 해상 모노파일 속채움과 같이 골재를 채운 후 그라우트재를 주입하는 프리플레이스트 공법에 대한 수중 불분리성 혼화제의 적용 효과를 파악하기 위해 골재 크기, 그라우트재의 종류, 물 시멘트비 및 혼화재 등 다양한 시험조건을 상정하여 블리딩 및 압축강도 등의 실내시험을 수행하였으며, 이에 따른 특성을 비교 평가하였다.

Keywords

References

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