Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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A fundamental study on the field applicability of the improved shape steel fiber shotcrete

형상을 개선한 강섬유보강 숏크리트의 현장 적용성에 관한 기초적 연구

  • Kim, Sang-Hwan (Department of Civil Engineering, Hoseo University) ;
  • Heo, Chung (Department of Civil Engineering, Hoseo University)
  • 김상환 (호서대학교 토목공학과) ;
  • 허청 (호서대학교 토목공학과)
  • Received : 2012.01.15
  • Accepted : 2012.01.29
  • Published : 2013.01.31
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Abstract

This paper presents the fundamental study on the field applicability of new-type steel fiber improved the existing shape. In this study, the theoretical reviews and the laboratory test programs were carried out to evaluate the mechanical characteristic of the new-type of steel fiber. The steel fiber sticking coefficient of new-type steel fiber was estimated from the test results. The laboratory scaled shotcrete rebound tests were also performed to analysis the field applicability of New-type steel fiber shotcrete and the mechanical behaviour of New-type steel fiber shotcrete were compared with that of the existing steel fiber shotcrete. It was found that the strength characteristic of New-type steel fiber shotcrete was increased.

본 연구에서는 새로운 형태의 강섬유로 보강된 숏크리트의 현장 적용성을 평가하기 위한 기초연구로 형상을 개선한 강섬유의 이론적 검토 및 역학적 특성실험을 실시하였다. 강섬유보강 숏크리트 강도에 영향을 주는 강섬유 부착계수 식을 이용하여 형상을 개선한 강섬유의 부착계수를 구하고 후크형 강섬유와 형상을 개선한 강섬유를 비교하였다. 역학적 특성실험에 사용한 시료는 기존의 후크형 강섬유보강 숏크리트 및 형상을 개선한 강섬유보강 숏크리트이며, 이들 시료를 이용해서 역학적 특성을 분석하기 위해 리바운드 실험을 실시하였다. 실험결과를 통해 형상을 개선한 강섬유보강 숏크리트가 기존 강섬유보강 숏크리트에 비해 강도특성이 향상됨을 확인했다.

Keywords

References

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