Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)

Korean Geotechnical Society (한국지반공학회)
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Performance of KICT-type Large Penetration Test (LPT)

한국형 대형관입시험 장비의 개발 및 현장 적용성 평가

  • Kim, Young-Seok (Dept. of Geotechnical Engineering, Korea Institute of Construction Technology) ;
  • Kim, Young-Chin (Dept. of Geotechnical Engineering, Korea Institute of Construction Technology) ;
  • Hong, Sung-Wan (Dept. of Geotechnical Engineering, Korea Institute of Construction Technology) ;
  • Kang, Jae-Mo (Dept. of Geotechnical Engineering, Korea Institute of Construction Technology) ;
  • Ji, Wan-Goo (Research Inst. of Technology, Samsung Corporation Engineering & Construction)
  • 김영석 (한국건설기술연구원 지반연구부) ;
  • 김영진 (한국건설기술연구원 지반연구부) ;
  • 홍성완 (한국건설기술연구원 지반연구부) ;
  • 강재모 (한국건설기술연구원 지반연구부) ;
  • 지완구 (삼성물산(주) 건설부문 기술연구소)
  • Published : 2007.09.14
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Abstract

It is well known that the standard penetration test (SPT) has been used in all over the world to get geotechnical properties of the ground. However, it is difficult to apply the SPT to the dense sand, gravel, weathered rock, etc. For the application of the SPT in these grounds, it is necessary to change in the diameter and the impact energy of the SPT. For the improvement of site investigation technology, Large Penetration Testing device (KICT-type LPT) was developed and applied to the in situ condition. The drop height and weight of the hammer in developed system were decided as 760 mm and 150 kg, respectively. Semi-auto hammer drop system identical with KS F2307 and JI A1259S was adopted. And the developed sampler has the inner diameter of 63 mm and the length of 500 mm with the adjustment of energy ratio to the SPT of 1.5. The hammer energy level was measured during the performance of the KICT-type LPT using SPI system (quality control system from driven piles).

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