DOI QR코드

DOI QR Code

Correlation Between Physical and Compaction Characteristics of Various Soils

다양한 지반의 물리적 특성과 다짐특성 상관성

  • Park, Choonsik (School of Civil, Environmental and Chemical Engineering, Changwon University) ;
  • Kim, Jonghwan (School of Civil, Environmental and Chemical Engineering, Changwon University)
  • Received : 2016.10.14
  • Accepted : 2016.12.25
  • Published : 2017.01.01

Abstract

This study, to provide quantitative data related to compaction characteristics, identifies the compaction characteristics of various types of soil samplers, in relation to their particle-size distribution and plasticity degree, and the compaction characteristics of artificially created granular materials, in relation to their A & D compaction. The results of the experiments show as follows. $r_{dmax}$ of clay is less than those of both sand and gravel approximately by 10%. O.M.C of clay has turned out to be greater than sand and gravel approximately by 20% and 30%, respectively. Changes in the compaction characteristics can be observed clearly around 30~60% of sand and 30~50% of passing No.200 sieve. It has also been shown that the compaction characteristics related to LL and PL are similar to each other in changes, and that the compaction characteristics become less clear with higher percent of fine grained soil. The compaction characteristics of the artificially created granular materials and field materials have appeared almost similar to each other. $r_{dmax}$ is less approximately by 30% and O.M.C greater approximately by 20% in A compaction than in D compaction. As $r_{dmax}$ and O.M.C become greater, its rate increases.

본 연구는 다짐특성과 관련된 정량적인 자료를 제공하고자, 현장에서 채취된 여러 종류의 흙에 대한 입도분포 및 소성도에 따른 다짐특성을 파악하고, 인위적으로 조성한 입상체 흙에 대하여 A, D다짐에 따른 다짐특성 관계를 파악하였다. 실험 결과 최대 건조단위중량은 점토질 흙이 모래질 흙과 자갈질 흙에 비해 약 10% 작게 나타났다. 또한 점토질 흙의 최적함수비는 모래질 흙에 비해 약 20%, 자갈질 흙에 비해 약 30% 크게 나타나는 경향을 보였다. 또한 #200체 통과량은 30~50%, 모래 함유량은 30~60% 정도에서 다짐특성의 뚜렷한 변화를 확인할 수 있었다. 액성한계와 소성한계에 따른 다짐특성은 유사한 변화특성을 나타내었고, 세립토의 함유량이 많을수록 다짐특성이 뚜렷하지 않은 결과를 얻을 수 있었다. 인위적으로 조성된 입상체 재료와 현장재료의 다짐 특성은 거의 유사한 변화특성을 보였다. 한편 D다짐에 비해 A다짐이 최대건조단위중량은 약 10% 작게, 최적함수비는 약 20% 크게 나타났으며, 최대건조단위중량과 최적함수비가 커질수록 그 비는 증가하는 것으로 나타났다.

Keywords

References

  1. Chinkulkijniwat, A., Man-Koksung, E., Uchaipichat, A. and Horpibulsuk, S. (2010), Compaction characteristics of non-gravel and gravelly soils using a small compaction apparatus, Journal of ASTM International, Vol. 7, No. 7, pp. 1-15.
  2. Gurtug, Y. and Sridharan, A. (2004), Compaction behaviour and prediction of its characteristics of fine grained soils with particular reference to compaction energy, Soil and Foundation, Vol. 44, No. 5, pp. 27-36. https://doi.org/10.3208/sandf.44.5_27
  3. Johnson, A. W. and Sallberg, J. R. (1960), Factors that influence field compaction of soils, Highway Research Board Bulletin, No. 272, pp. 206.
  4. KS F 2312 (2001), Standard test method for soil compaction using a rammer, https://standard.go.kr/KSCI/standardIntro/getStandardSearchView.do
  5. Lee, J. H., Hwang, B. S., Chae, D. H. and Cho, W. J. (2015), Evaluations on the compaction energy effects on the soil compaction at sub-zero temperature, Journal of the Korean Geo-Environmental Society, Vol. 16. No. 8, pp. 13-18 (in Korean).
  6. Lee, K. W. and Suedkamp, R. J. (1972), Characteristics of irregularly shape compaction curvers of soils, Highway Research Record, No. 381, National Academy of Sciences, Washington, D.C., pp. 1-9.
  7. Lim, J. H. (2007), Application of Ohio compaction curve in Korea using compaction test results of subgrade, Master's thesis, Yonsei University, pp. 6-44 (in Korean).
  8. Pandian, N. S., Nagaraj, T. S. and Manoj, M. (1997), Reexamination of compaction characteristics of fine grained soils, Geotechnique, Vol. 47, No. 2, pp. 363-366. https://doi.org/10.1680/geot.1997.47.2.363
  9. Park, J. H. (2010), A study on evaluation of compaction ratio using 10% air voids line, Master's thesis, Keimyung University, pp. 36-51 (in Korean).
  10. Ring III, G. W., Sallberg, J. R. and Collins, W. H. (1962), Correlation of compaction and classification test data, Highway Research Board Bulletin, No. 325, pp. 577-587.
  11. Seo, J. W., Choi, J. S., Kim, J. M., Roh, H. S. and Kim, S. I. (2003), Fundamental study for compaction methods by mechanical tests, International Journal of Highway Engineering, Vol. 5, No. 4, pp. 23-35 (in Korean).
  12. Sridaran, A. and Nagaraj, H. B. (2005), Plastic limit and compaction characteristics of fine-grained soils, Ground Improvement, Vol. 9, No. 1, pp. 17-22. https://doi.org/10.1680/grim.2005.9.1.17
  13. Sridharan A., Rao, S. M. and Joshi, S. (1990), Classification of expansive soils by sediment volume method, Geotechnical Testing Journal, Vol. 3, No. 4, pp. 375-380.

Cited by

  1. 해상처분장 연직차수공을 위한 DHLT 이음부의 개발 vol.34, pp.3, 2017, https://doi.org/10.7843/kgs.2018.34.3.43
  2. 칼슘 벤토나이트-모래 혼합차수재의 투수 및 구조 특성에 관한 연구 vol.18, pp.2, 2017, https://doi.org/10.12814/jkgss.2019.18.2.001