Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Estimation of Void Ratio of Sandy Soil Using X-ray CT Scan

X-ray CT 스캔을 이용한 사질토 간극비 측정

  • 김광염 (한국건설기술연구원 지반연구실) ;
  • 신휴성 (한국건설기술연구원 지반연구실) ;
  • 허성준 (홍익대학교 토목공학과) ;
  • 임성빈 (한국건설기술연구원 지반연구실) ;
  • 권영철 (한국사이버대학교 소방방재학과) ;
  • 김홍택 (홍익대학교 토목공학과)
  • Received : 2010.11.19
  • Accepted : 2010.12.20
  • Published : 2011.01.31
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Abstract

In this study, a new methodology by using the X-ray CT scan is proposed for estimating void ratio of sandy soil. The general problems in high resolution X-ray CT scan such as beam hardening and ring artifact had been successfully settled up using thin metal plate filter and some calibration process. In order to calculate the void ratio of sand from its CT image, the procedures and algorithm for CT image processing are developed. CT scan tests for Joomunjin sand are carried out to verify its applicability to void ratio testing.

본 연구에서는 산업 전분야에 걸쳐 다양하게 활용되고 있는 X-ray CT의 지반분야 적용을 위해 X-ray CT를 이용한 사질토의 간극비 측정에 관한 연구를 수행하였다. 이를 위해 고분해능 X-ray CT 시스템의 적용에 문제가 되는 빔하드닝(Beam hardening) 및 동심원상 화상결함(Ring artifact) 등에 대한 문제점 지적 및 해결방안을 제시하였다. 또한 X-ray CT를 이용한 간극비 산정을 위한 알고리즘 및 프로그램을 개발하였으며, 이를 이용하여 주문진 표준사의 간극비를 측정하여 신뢰성을 검토하였다.

Keywords

References

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