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2014 Vol.13, Issue 3 Preview Page
A Mechanical Properties According to the Compaction Degree on Weathered Granite Soil Using Lightweight Dynamic Cone Penetrometer

경량 동적콘관입시험기를 이용한 화강풍화토의 다짐도에 따른 역학특성

Yeon-Il Kim1
,
Jin-Young Kim1
,
Jae-Rok Shim1
,
Jin Choi1
,
Kwon-Soo Kang2
,
Won-Jin Baek3
,
Kang-Il Lee4*
김 연일1
,
김 진영1
,
심 재록1
,
최 진1
,
강 권수2
,
백 원진3
,
이 강일4*
1Graduate students, Department of Rural & Boisystems Eingineering, Chonnam National University
2Professor, Department of Civil Engineering, Seonam University,
3Associate Professor, Department of Rural & Boisystems Eingineering, Chonnam National University
4Professor, Department of Civil Engineering, Dae-Jin University
*교신저자. *Corresponding Author. 
30 September 2014. pp. 21-30
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Abstract

In this study, the applicability of the lightweight dynamic cone penetrometer in the domestic slope site was investigated using the weathered granite soil sampled form the Namwon slope site. And then, the lightweight dynamic cone penetration tests according to the change in the degree of compaction and water content were performed and it was analyzed with the correlations between the degree of compaction, the void ratio, the degree of saturation and the value of cone resistance. From the laboratory test results, the cone penetration resistance was rapidly increased in the dry side of the optimum moisture content, and it was largely decreased in the wet side of the optimum moisture content. Moreover, when the degree of compaction and the degree of saturation are large, the cone resistance is increased linearly. And a high correlativity was shown between water content, void ratio, the degree of saturation and the cone resistance. From these results, it is judged that the lightweight dynamic cone penetrometer can be applied to the investigation on the site slope.

Keywords
Weathered granite soil
Field investigation
Compaction degree
Light weight dynamic cone
Strength parameter

본 연구에서는 남원 사면현장에서 채취된 화강풍화토를 이용하여 경량 동적콘관입시험기의 국내 사면현장에서 적용성을 조사하였다. 그리고 다짐도와 함수비 변화에 따른 경량 동적콘관입시험을 수행하고, 다짐도, 간극비, 포화도와 콘관입 저항치와의 상관성을 분석하였다. 그 결과로 최적함수비의 건조측에서 함수비 증가와 더불어 관입저항치가 급격히 증가하고 습윤측에서 크게 감소하는 경향을 나타내었다. 또한 물리적 특성과의 상관관계에서 다짐도 및 포화도가 클수록 콘 저항치가 선형적으로 증가하는 것을 확인하였다. 이로 인해 역학특성 변화에 따른 함수비, 간극비, 포화도와 콘관입저항치 사이에 높은 상관성을 보여 사면조사시 경량 동적콘관입시험기의 현장적용이 가능할 것으로 판단된다.

References
1
1.Park, B. K., (1973), A study on the physical properties of weathered granite soils in Kwangju District, Journal of Korean Society of Civil Engineers, Vol.21, No.4, pp.37-50.
2
2.Park, B. K., (1974), A study on compaction and permeability characteristics of weathered granite soils in Kwangju District, Journal of Korean Society of Civil Engineers, Vol.22, No.2, pp.83-96.
3
3.Athapaththu, A.M.R.G., Tsuchida, T., Suga, K. and Kano, S., (2007), A light weight dynamic cone penetrometer for evaluation of natural masado slopes, Journal of Japanese Society of Civil Engineers, Vol.63, No.2, pp.403-416.
4
4.Cassan, M., (1988), Les Essais in Situ en Mechanique des Sols. Realisation et Interpretation, Vol 1, pp.146-151.
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6.Kim, J. H., (2000), A study of shear parameters and weathering degree of decomposed of granite soils on cutting plane using small dynamic penetration tests, Graduate school of Chonnam national university.
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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 :3
  • Pages :21-30
  • Received Date : 2014-07-31
  • Revised Date : 2014-08-26
  • Accepted Date : 2014-08-28
  • DOI :https://doi.org/10.12814/jkgss.2014.13.3.021
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