Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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An Experimental Study on the Shear Wave Velocity Improvement of Ground by Ground Improvement

지반개량을 통한 원지반의 전단파속도 향상에 대한 실험적 연구

  • 정찬유 (이엑스티 주식회사, 기술연구소) ;
  • 문재성 (이엑스티 주식회사, 기술연구소) ;
  • 조명수 (이엑스티 주식회사, 기술연구소) ;
  • 강호덕 (롯데건설, 기술연구원) ;
  • 양희정 (롯데건설, 기술연구원)
  • Received : 2019.10.02
  • Accepted : 2019.11.19
  • Published : 2019.12.01
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Abstract

In this study, an experimental study was carried out with variables of the shape of the ground soil-binder in order to find out whether the shear wave velocity and the ground grade were improved by the ground improvement. In this study, the shear wave velocity was measured using the crosshole method with variables of the shape of the ground soil-binder. In addition, the prediction formula of the shear wave velocity for suitability of N-Values for the domestic soil conditions are proposed using the result value of this study and the existing results of shear wave velocity. As a result, the shear wave velocity of the ground has increased. In addition, the prediction formula proposed in this study reasonably issued the existing experimental results regardless of the stratum conditions.

이 연구에서는 지반의 개량에 따른 전단파속도 및 지반등급 향상 여부를 알아보기 위하여 지반개량체의 형상을 변수로 실험적 연구를 수행하였다. 실험은 지반개량체의 형상을 변수로 크로스홀(Cross hole) 기법을 이용하여 전단파속도를 측정하였다. 또한, 이 연구에서 측정된 결과와 기존 전단파속도 측정결과를 이용하여 국내 지반조건에 맞는 N-Value에 대한 전단파속도 예측식을 제안하였다. 실험결과, 지반개량을 수행하는 경우 원지반의 전단파속도는 소폭 상승하였다. 또한, 이 연구에서 제안한 예측식은 지층조건에 관계없이 기존실험결과를 합리적으로 예측하였다.

Keywords

References

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