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

Korean Geo-Environmental Society (한국지반환경공학회)
권호 표지
DOI QR코드

DOI QR Code

An Experimental Research About Settling and Consolidation Characteristic of Dredged Soil in West Coast

서해안 준설토의 침강압밀특성에 관한 실험적 연구

  • 이승호 (상지대학교 건설시스템공학과) ;
  • 이정학 ((주) 건창이앤텍)
  • Received : 2011.01.14
  • Accepted : 2011.04.07
  • Published : 2011.05.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, settling experiment was performed about cohesive and sandy soils among representative sample expected to dredge and dump for analysis of settling and consolidation characteristic. The analysis showed the definite difference between cohesive soils and sandy soils of relationships with settling and consolidation coefficient, a water content, interfacial heights. But directly after a dredged reclamation, prediction results about a initial volume change showed that cohesive soil of a water content change was decreased rapidly as time goes by, but sandy soils made no difference in a water content change. Results were compared and analyzed with the settling and consolidation coefficient and a initial settling velocity by real soil amounts for a feasibility check about test conditions applied to these experiment: we judge that test conditions are appropriate, each material by such these analyses suggests the scope of settling and consolidation coefficient, average and the representative relational formula.

본 연구에서는 침강압밀특성을 분석하기 위하여 준설투기가 예상되는 대표시료 중 점성토와 사질토를 대상으로 침강시험을 실시하였다. 분석결과 침강압밀계수($C_s$), 함수비와 계면고의 관계에서 점성토와 사질토는 뚜렷한 차이를 보이고 있다. 그러나 준설매립 직후 초기 체적변화 예측결과 점성토에서는 시간에 따른 함수비변화가 급감하였으나 사질토층에서 함수비변화에 따른 차이를 보이지 않았다. 또한 본 실험에서 적용한 실험조건에 대한 타당성 검토를 위해 실질토량고에 따른 침강압밀계수와 초기침강 속도를 분석한 결과 실험조건은 적정한 것으로 판단되며, 이와 같은 분석으로 재료 각각에 대하여 압밀침강특성치의 범위와 평균 및 대표적인 관계식을 제안하였다.

Keywords

References

  1. 박진호(2003), 동남임해지역 준설매립토의 침강.자중압밀 특성에 관한 연구, 석사학위논문, 부산대학교, pp. 34-63.
  2. 이송, 이규환, 심민보(1999), 준설점토의 체적비 산정에 관한 실험적 연구, 대한토목학회 논문집, Vol. 19, No. 3-5, pp. 985- 994.
  3. 오택섭, 최현철(2003), 사회과학데이터분석, (주)나남출판, pp. 17-20.
  4. 전상현, 유남재(2009), 국내 해성점토의 침강압밀특성에 관한 실험적 연구, 한국지반환경공학회 논문집, Vol. 10, No. 6, pp. 89-98.
  5. 전제성(2000), 연약지반의 압밀거동 예측을 위한 비선형 압밀 해석, 박사학위논문, 서울시립대학교, pp. 57-97.
  6. 최성운(2003), 준설토의 2차원 퇴적특성에 관한 연구, 석사학위논문, 군산대학교, pp. 24-39.
  7. 하영조(2001), 준설토의 자중압밀특성에 관한 연구, 석사학위논문, 동아대학교, pp. 31-69.
  8. 矢野弘一郞(1985), 浚渫粘土による軟弱埋立地盤の性狀とその 豫測, 日本土木學會論文集, Vol. 364, No. III-4, pp. 1-15.
  9. Been, K. and Sills, G. C.(1981), Self-weight Consolidation of Soft Soils : An Experimental and Theoretical tical Study, Geotechnique, Vol. 31, No. 4, pp. 519-535. https://doi.org/10.1680/geot.1981.31.4.519
  10. Bloomquist, D. G. and Townsend, F. C.(1984), Centrifugal Modeling of Phosphatic Clay Consolidation, Proceedings of Symposium on Sedimentation/Consolidation Models, Prediction and Validation, R. N. Young and F. C. Townsends, Eds, San Francisco, ASCE, pp. 565-580.
  11. Gibson, R, E., England, G. L. and Hussury, M. J. L.(1967), The Theory og One-dimensional Consolidation og Saturated Clay I : Finite Non-linear Consolidation of Thin Homogeneous Layers, Geotechnique, Vol. 17, No. 3, pp. 261-273. https://doi.org/10.1680/geot.1967.17.3.261
  12. Imai, G.(1981), Experimental Studies on Sedimentation Mechanism and Sediment Formation of Clay Materials, Soil and Foundations, Vol. 21, No. 1, pp. 7-20. https://doi.org/10.3208/sandf1972.21.7
  13. Kynch, G. J.(1952), A Theory of Sedimentation, Trans. Faraday Soc, No. 48, pp. 166-177.
  14. Mikasa, M.(1963), The Consolidation of Soft Clay-A New Consolidation Theory and its Application, Kajima Institution Publishing Co., Ltd., Tokyo, Japan, pp. 126-140.
  15. Monte J. L. and Krizek R. J.(1976), One-dimensional Mathematical Model for Large Strain Consolidation, Geotechnique, Vol. 26, No. 3, pp. 495-510. https://doi.org/10.1680/geot.1976.26.3.495
  16. Pane, V.(1984), Non-linear Finite Strain Consolidation of Marine Sediments. Seabed Mechanics, B. Denness (ed.), Graham & Trotman Co., Ltd., London, Vol. 17, pp. 52-68.
  17. Pane, V. and Schiffman, R. L.(1985), A Note on Sedimentation and Consolidation, Geotechnique, Vol. 35, No. 1, pp. 69-72. https://doi.org/10.1680/geot.1985.35.1.69
  18. Tan, T. S., Young, K. Y., Leong, E, C. and Lee, S. L.(1990), Sedimentation of Clayer Slurry, Geotechnical Engineering, Vol. 116, No. 6, pp. 885-898. https://doi.org/10.1061/(ASCE)0733-9410(1990)116:6(885)
  19. Yano, K.(1985), Properties of Very Soft Ground Reclaimed by Dredged Marine Clay and Their Prediction. Trans. Japan Society of Civil Engineering. Vol. 364. pp. 1-14.