한국지반환경공학회 논문집 (Journal of the Korean GEO-environmental Society)

  • 제15권8호
  • /
  • Pages.23-30
  • /
  • 2014
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  • 1598-0820(pISSN)
  • /
  • 2714-1233(eISSN)
한국지반환경공학회 (Korean Geo-Environmental Society)
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동적콘관입시험값과 표준관입시험값의 상관성 분석

Correlation Analysis between DCPT Value and SPT Value

  • Lee, Bongjik (Department of Civil Engineering, Korea National University of Transportation) ;
  • Lee, Jongkyu (Technical Firm DAWON Co., LTD.)
  • 투고 : 2014.04.23
  • 심사 : 2014.06.13
  • 발행 : 2014.08.01
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초록

현장 관입시험은 각종 해석과 설계를 위하여 지반공학 분야에서 널리 사용되어 오고 있다. 이중 표준관입시험과 동적콘관입시험이 동적 사운딩에 가장 대표적인 시험들이다. 동적콘관입시험은 원래 노상토의 특성 평가를 위하여 개발되었다. 동적콘관입시험의 가장 큰 장점은 간편하고 경제적이며, 상부에 견고한 층이 분포하는 연약층과 같은 비선형적인 지역의 지반조건을 빠르게 평가할 수 있는 데 있다. 그러나 시험의 표준화가 되지 않음에 따라 광범위한 사용이 제한되고 있는 실정이다. 이에 본 연구에서는 대형콘관입시험장비를 이용하여 동적콘관입시험과 표준관입시험값과의 상관성을 평가하였다. 동적콘관입시험과 표준관입시험간의 회귀분석과 신뢰성 해석을 실시하였으며 그 결과 변환계수는 토질특성에 따라 1.12~1.31 사이에 분포하는 것으로 나타났다.

In-situ penetration tests have been widely used in geotechnical engineering for site investigation in support of analysis and design. Standard Penetration Test (SPT) and Dynamic Cone Penetration Test (DCPT) are typical dynamic sounding. DCPT was originally developed as an alternative for evaluating the properties of subgrade soils. The main advantages of DCPT are that it is fast, inexpensive, and it is particularly useful in delineating areas of weak soils overlying stronger strata and in quickly assessing the variability of the soil conditions. But lack of standardization is main reason that this test method has not been advanced more in recent years. In this study, it is clarified the correlation with the SPT blow count, N from DCPT data using big DCP eqipment. Regression analysis and correlationship analysis were conducted with the data from relationship between SPT and DCPT. The analysis results showed that the convert fact are in the range of 1.12~1.31 with variation with soil property.

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참고문헌

  1. An, J. H., Yang, S. L., Park, H. M. and Kwon, S. A. (2004), Application of the dynamic cone penetrometer for strength estimation of pavement foundation, International Journal Highway Engineering, Vol. 8, No. 4, pp. 75-85 (in Korean).
  2. Bowles, J. E. (1997), Foundation analysis and design (5th edition), McGraw-Hill N.Y., pp. 155-198.
  3. Daniel, C. R. and Howie, J. A. (2003), A method for correlation large penetration test (LPT) to standard penetration test (SPT) blow counts, Canadian Geotechnical Journal, Vol. 40, No. 1, pp. 66-77. https://doi.org/10.1139/t02-094
  4. Khan, I. H. (2005), Textbook of geotechnical engineering, Prentice-Hall of India, pp. 194-195.
  5. Langton, D. D. (1999), The panda lightweight penetrometer for soil investigation and monitoring material compaction, Ground Engineering, Vol. 32, Issue 9, pp. 33-37.
  6. Oh, H. J. (2009), Reliability analysis and resistance characteristics of dynamic cone penetration test according to ground characteristics, Master's thesis, Chungju National University, pp. 1-15 (in Korean).
  7. Som, N. N. and Das, S. C. (2004), Theory and practice of foundation design, Prentice-Hall of India, pp. 41-50.
  8. TxDOT (2012), Geotechnical manual, Manual Notice 2012-1, Texas Department of Transportation, Texas, pp. 3-1-3-5.
  9. Webster, S. L., Grau, R. H. and Williams, R. P. (1992), Description and application of dual mass dynamic cone penetrometer, Instruction Report, No. GL-92-3, U.S Army Engineer Waterways Experiment Station, pp. 42-50.