Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Permeability Characteristics of Pusan Clay from Laboratory Tests

실내실험에 의한 부산점토의 투수특성

  • 정성교 (동아대학교 토목공학부) ;
  • 장우영 (동아대학교 건설기술연구소) ;
  • ;
  • 김성렬 (동아대학교 토목공학부)
  • Published : 2006.11.30
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Abstract

Pusan clay, which is distributed in the Nakdong River estuary, is unusually soft and thick compared with other clays in the world. Because the consolidation settlement of the clay was significantly underestimated in several recent reclamation projects, it has been emphasized particularly on the need of studying the permeability characteristics. This study carries out vertical and horizontal permeability tests on undisturbed and consolidated samples from two sites of the area. The results of the study show the peculiar permeability anisotropy and the relationships with other indexes on Pusan clay and also comparison with those of other world clays.

낙동강 하구지역에는 세계적으로 드물게 연약한 부산점토가 두껍게 분포하고 있다. 최근의 지반개량공사에서 압밀침하에 대한 과소평가 문제가 발생하여 이 점토의 투수특성에 대한 연구가 절실히 요구되고 있다. 따라서 본 연구에서는 그 점토의 투수특성을 규명하기 위한 목적으로 낙동강 하구의 두 지역을 연구대상현장으로 선정하여 불교란 시료채취를 실시하고 이 시료에 대하여 자연점토는 물론 연직 및 수평배수 압밀실험 중에 실내 변수두 투수실험에 의하여 연직 및 수평 투수계수를 측정하였다. 이 결과로부터 자연상태 및 압밀상태 하에서의 투수계수, 투수 이방성 및 그들의 상관관계 규명은 물론 해외의 다른 점토들에 대한 투수특성과의 비교를 수행하였다.

Keywords

References

  1. 정성교, 장우영, E. Ninjgarav, 류춘길(2006), '낙동강 하구지역의 부산점토의 퇴적환경에 따른 압축특성', 한국지반공학회 논문집, (제22권 12호 게재예정)
  2. 윤찬영, 장인성, 정충기(2002), '일정변형률 압밀시험을 이용한 방사배수 조건하에서의 압밀해석', 한국지반공학회 논문집, 제18권, 4호, pp.147-157
  3. Abelev, M. Y. (1973), 'Construction D'ouvrages Sur les Soils Argileux Mous Satures', Translated from Russian by J. P. Magnan, Technique et Documentation, Paris, 372p
  4. Amar, S. and Dupuy, H. (1973), 'Etude de la Permeabilite des Sols Fins Mesuree en Laboratoire', Research Report No.23, Laboratoire Central des pants et Chaussees, Paris, p.34
  5. Carman, P. C. (1956), Flow of Gases through Porous Media, Butterworths, London
  6. Casagrande, L. and Polous, L. (1969), 'On the Effectiveness of Sand Drains', Canadian Geotechnical Journal, Vol.6, No.3, pp.287-326 https://doi.org/10.1139/t69-030
  7. Chan, H. T., and Kenney, T. C. (1973), 'Laboratory Investigation of Permeability Ratio of New Liskeard varved soil', Canadian Geotechnical Journal, Vol.10, No.3, pp.453-472 https://doi.org/10.1139/t73-038
  8. Chung, S.G. (1999), 'Engineering Properties and Consolidation Characteristics of Kimhae Estuarine Clayey Soil', Thick Deltaic Deposits, ATC-7 Workshop, Special Publication at the 11th ARC on SMGE, Seoul, pp.93-108
  9. Chung, S.G. (2005), 'Sampling Techniques and Their Effects in Characterizing of Pusan Clay', Keynote Lecture: Current Geotechnical Issues of Thick Clay Deposits ATC-7 and KGS, Busan Korea, Sept, pp.3-36
  10. Giampaolo, C. and Paolo, S. (2001), 'Permeability Evaluation and its Implications for Consolidation Analysis of an Italian Soft Clay Deposit', Canadian Geotechnical Journal, Vol.38, No.6, pp.1166-1176 https://doi.org/10.1139/cgj-38-6-1166
  11. Goodall, D.C. and Quigley, R.M. (1977), 'Pollutant Migration from two sanitary landfill sites near Samia, Ontario', Canadian Geotechnical Journal, Vol.14, No.2, pp.223-236 https://doi.org/10.1139/t77-023
  12. Jacobson, B. (1955), 'Isotropy of Clay', Geotechinque, Vol.5, No.1, pp.23-28 https://doi.org/10.1680/geot.1955.5.1.23
  13. Kozeny, J. S. (1927), Uber Kapillare Leitung des Wassers im Boden, Sitzungsberichte der Akadamie der Wissenschaflen in Wien, Abteilung Iia, p.136
  14. Leroueil, S., Magnan, J. P. and Tavenas, F. (1990), 'Embankment of Soft Clays', Ellis Horwood
  15. Leroueil, S. and Hight, D. W. (2003), Behaviour and Properties of Natural Soils and Soft Rocks, Charaterisation and Engineering Properties of Natural Soils, 2003 Swets & Zeitlinger, Lisse
  16. Mesri, G. and Oslon, R. E. (1971), 'Mechanisms Controlling the Permeability of Clays', Clays and Clay Minerals, Vol.19, pp.151-158 https://doi.org/10.1346/CCMN.1971.0190303
  17. Mesri, G. and Rokhsar, A. (1974), 'Theory of Consolidation for Clays', ASCE Journal of the Geotechincal Engineering Division, Vol.100, GT8, pp.889-904
  18. Mesri, G. and Tavenas, F. (1983), 'Discussion on Permeability and Consolidation of Normally consolidated Soils by Samarasinghe et al.', ASCE Journal of the Geotechincal Engineering Division, Vol.109, GT6, pp.873-878 https://doi.org/10.1061/(ASCE)0733-9410(1983)109:6(873)
  19. Raymond, G. P. and Azzouz, M. M. (1969), 'Permeability Determination for Predicting Rates of Consolidation', Proceedings, Conference on In Situ Investigations of Soils and Rocks, British Geotechnical Society, London, pp.195-203
  20. Tanaka, H., Dinesh, R., and Tanaka. M. (2003), 'Pore Size Distribution of Clayey Soils Measured by Mercury Intrusion Porosimetry and its Relation to Hydraulic Conductivity', Soils and Foundations Vol.43, No.6, pp.63-73
  21. Tavenas, F., Jean, P., Leblond, P. and Leroueil, S. (1983), 'The Permeability of Natural Soft Clays, Part II: Permeability Characteristics', Canadian Geotechnical Journal, Vol.20, No.4, pp.645-660 https://doi.org/10.1139/t83-073