DOI QR코드

DOI QR Code

A Study on Cone Factors for Northeastern Part of Shiwha Area II:Reliability and Soil Properties

시화지구 북동지역에서의 콘 계수 연구 II:신뢰도 및 토질정수

  • Kim, Dae-Kyu (Dept. of Civil Engineering, Sangmyung University)
  • 김대규 (상명대학교 건설시스템공학과)
  • Received : 2011.10.26
  • Accepted : 2011.12.13
  • Published : 2011.12.31

Abstract

In this study, the values of the four kinds of cone factors($N_{kt}$, $N_{ke}$, $N_{{\Delta}u}$, and recently proposed $N_e$) and the soil properties, for the northeastern part of Shiwha area, were investigated. The measured and calculated undrained strengths, which have been obtained from the various experimental data, were compared with each other, and their relationship with the plastic index was also studied. The strength from the $N_{{\Delta}u}$ method was unexpectedly not reasonable and the higher values of cone factors were observed with the larger plastic index.

본 연구에서는, 시화지구 북동지역 지반에 대하여 네 가지 종류의 콘계수 값들($N_{kt}$, $N_{ke}$, $N_{{\Delta}u}$, 최근 제안된 $N_e$)과 지반의 특성치들과의 관계를 고찰하였다. 다양한 실험결과를 활용하여 계산한 비배수강도와 실제 측정된 비배수강도를 비교하였으며, 이들 값들과 소성지수와의 관계를 분석하였다. $N_{{\Delta}u}$를 활용하여 구한 비배수강도는 의외로 좋은 결과를 보여주지 못했으며, 소성지수 값이 커질수록 콘계수 값이 커지는 현상이 고찰되었다.

Keywords

References

  1. R. G. Campanella, P. K. Robertson, D. G. Gillespie, J. Greig, "Recent Developements in insitu Testing of Soils," Pro. 11th Int. Conf. on Soil Mechanics and Foundation Engineering, Sanfrancisco, pp. 849-854, Vol. 2, 1985.
  2. S. F. Su, H. J. Liao, "Influence of Strength Anisotropy on Piezocone Resistance in Clay," J. of Geotechnical and Geoenvironmental Engineering, pp. 166-173, Vol. 128, No. 2, Feb., 2002. https://doi.org/10.1061/(ASCE)1090-0241(2002)128:2(166)
  3. C. Kim, S. Kim, J. Lee,, "Estimation of Undrained Shear Strength for Clays using Effective Cone Factor," J. of Korean Society of Geotechnical Engineers, pp. 133-141, Vol. 24, No. 11, 2008.
  4. D. Kim, "Interpretation of Empirical Cone Factors for Determining Undrained Strength," J. of Korea Academia-Industrial Cooperation Society, pp. 3296-3301, Vol. 10, No. 11, November, 2009. https://doi.org/10.5762/KAIS.2009.10.11.3296
  5. D. Kim, "A Study on Cone Factors for Northeastern Part of Shiwaha Area I: Evaluation and Pore Pressure Parameter," J. of Korea Academia-Industrial Cooperation Society, in press.
  6. T. Lunne, H. P. Chrisoffersen, T. I. Tjelta, "Engineering Use of Piezocone Data in North Sea Clays," Pro. 11th Int. Conf. on Soil Mechanics and Foundation Engineering, Sanfrancisco, pp. 907-912, Vol. 2, 1985.
  7. T. Lunne, P. K. Robertson, J. J. M. Powell, Cone Penetration Testing, Blackie Academic and Professional, 1997.