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Development of Advanced Dynamic Cone Penetration Test Apparatus and Its Application Performance Evaluation

개량식 동적 콘 관입시험기의 개발 및 적용성 평가

Uk-Gie Kim1
,
Li Zhuang2
,
Kwang-Wu Lee3*
김 욱기1
,
Zhuang Li2
,
이 광우3*
1Post Doctoral Researcher, Geotechnical Engineering Research Division, Korea Institute of Civil engineering and building Technology
2Research Specialist, Geotechnical Engineering Research Division, Korea Institute of Civil engineering and building Technology
3Senior Researcher, Geotechnical Engineering Research Division, Korea Institute of Civil engineering and building Technology
*교신저자. *Corresponding Author. 
30 December 2014. pp. 119-131
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Abstract

For quick and accurate ground investigation in wide construction site being not easy to access, advanced dynamic cone penetration test equipment was developed based on widely used equipment abroad. Advantages of existing equipment of portability and simple testing method were reflected in the new developed equipment. Meanwhile, by extending connection of lower rod, penetration depth is raised to 6m from 1 m of the existing equipment. Moreover, by assembly of hammer (2+3+3kg) and cone (3 types) etc., it is possible to perform test under the same conditions with those by German and Japan dynamic cone penetration test equipment (Tsukuba, PWRI and SH types). Auxiliary equipment was applied to make sure of perpendicularity as penetration depth increases. Applicability of the new developed equipment was evaluated through tests on various fields and its reliability was verified.

Keywords
Site investigation
In situ test
Dynamic cone penetration test
SPT N value
Cone Resistance

본 연구에서는 광역 부지나 현장 접근성이 용이하지 않은 현장의 지반조사를 신속·정확하게 수행하기 위한 목적으로 해외에서 널리 사용되고 있는 동적 콘 관입시험기를 개선한 개량형 동적 콘 관입시험기를 개발하였다. 기존의 동적 콘 관입시험기의 장점인 휴대성, 간단한 시험방법 등은 그대로 반영하는 한편, 하부 로트의 결합 연장을 통하여 기존 시험기의 지반 관입심도 1m에서 6m까지 관입되도록 고안하였다. 또한, 해머(2+3+3kg), 콘(3type) 등의 조합으로 독일식/일본식 간이 동적 콘 관입시험기(Tsukuba, PWRI, SH type)와 동일한 제원으로 시험이 가능하며, 심도가 깊어짐에 따라 시험 결과에 영향을 미치는 수직도를 확보할 수 있도록 보조 장치를 적용시켰다. 이렇게 개발·제작한 개량형 동적 콘 관입시험기의 적용성을 평가하기 위하여 국내/외 현장의 다양한 지반에 대하여 시험을 수행하여 그 신뢰성을 확보하였다.

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 13
  • No :4
  • Pages :119-131
  • Received Date : 2014-11-03
  • Revised Date : 2014-12-19
  • Accepted Date : 2014-12-23
  • DOI :https://doi.org/10.12814/jkgss.2014.13.4.119
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