Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
권호 표지

Consolidation Characteristics of Dredged Mixed Soil with Inserted Materials

혼입재료에 따른 준설 매립 혼합토의 압밀 특성

  • Yoon Hyun-Suk (Geotechnical Engrg. Research Dept., Korea Institute of Construction Technology) ;
  • Lee Ki-Ho (School of Civil, Urban & Geosystem Engrg., Seoul National Univ.) ;
  • Park Jun-Boum (School of Civil, Urban & Geosystem Engrg., Seoul National Univ.) ;
  • Kim Jae-Young (Sambo Engrg. Co., LTD.)
  • Published : 2005.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, consolidation test and numerical analysis were performed with the aim of investigating the characteristics of consolidation behavior of mixed soil with the amount and particle shape of inserted materials. Mixed soil was made up of matrix (dredged clay) and inserted material (crashed oyster shell and/or sand). The concept of stress share ratio was introduced to evaluate the consolidation characteristics of mixed soils. And the finite differential numerical analysis was carried out by applying the Mikasa's consolidation theory. From the results of experiments and numerical analysis, it was verified that mixed soil consolidation behavior is affected by changes in inserted material. When a similar amount of granular material was inserted, the compressibility of the clay matrix of oyster shell mixed soil was smaller than that of sand mixed soil.

본 연구에서는 혼입재료의 혼합비와 입자 형태에 따른 혼합토의 압밀 거동 특성을 평가하고자 압밀 시험과 수치해석을 실시하였다. 실험 대상인 혼합토는 매질인 준설점토와 혼입재료인 파쇄된 굴패각(혹은 모래)으로 구성하였다. 응력분담률이라는 개념을 이용하여 혼합토의 압밀특성을 파악하고 Mikasa압밀이론을 이용한 유한차분 수치해석을 실시하였다. 그 결과, 혼입재료에 따라 혼합토의 압밀 거동에 차이가 있음을 증명하였다. 같은 양의 조립재가 혼합되어 있는 경우 굴패각 혼합토의 점토 매질의 압축성이 모래혼합토의 경우보다 작게 나타났다.

Keywords

References

  1. 이기호, 한종옥 (2001a), '굴패각 혼합토의 압밀 및 투수특성', 대한토목학회논문집, 제21권, 제4-C호, pp.375-384
  2. 이기호, 박준범 (2001b), '굴패각을 포함한 혼합토의 전단.변형특성 평가를 위한 균질화법의 적용' 한국지반공학회논문집, 제17권, 제4호, pp.183-190
  3. Hashidate, Y.T. (1993a), 'Engineering characteristics of sand mixed with crushed oyster-shell', 29th Proceeding of Japan Geotechnical Society, pp.869–872
  4. Hashidate, Y.T. (1993b), 'Application to sand compaction pile and characteristics of sand mixed with crushed oyster-shell', 29th Proceeding of Japan Geotechnical Society, pp.717–720
  5. Hsieh, C. W. and Ho, Y-H (2002), 'Engineering properties of tire chip/cohesive soil mixtures', TRB, No.02-3001, Washington, D.C
  6. Humphrey, D., Sanford, T., Cribbs, M. and Manion, W. (1993), 'Shear strength and compressibility of tire chips for use as retaining wall backfill', TRR, No. 1422, TRB, Washington, D.C., pp.29-35
  7. Kaniraj, S. R. and Havanagi, V. G. (2001), 'Behavior of cementstabilized fiber-reinforced fly ash-soil mixtures', Journal of geotechnical and geoenvironmental engineering, ASCE, Vol.127, No.7, pp.574-584 https://doi.org/10.1061/(ASCE)1090-0241(2001)127:7(574)
  8. Kumar K.V and Wood D.M. (1999), 'Fall cone and compression tests on clay-gravel mixtures', Geotechnical Journal, Vol.49, No.6, pp.727-739
  9. Lee, K.H. (2000), The study of evaluation of characteristics of waste mixed soils, Ph.D. dissertation thesis, Tohoku University (in Japanese)
  10. Masad, E., Taha, R., Ho C. and Papagiannakis, T. (1996), 'Engineering Properties of Tire/Soil Mixtures as a Lightweight Fill Material', Geotechnical Tesing Journal, Vol.19, No.3, pp. 297-304 https://doi.org/10.1520/GTJ10355J
  11. Mikasa, M. (1963), 'Consolidation of soft clay – New consolidation theory and its application', Kajima Shuppan-kai (in Japanese)
  12. Miyaji Y. and Okamura, T. (2000), 'Geo-material properties of wasted oyster-shell-sand mixture and its application as material for sand compaction pile', Proceeding of Coastal Geotechnical Engineering in Practice. Balkema, Rotterdam, pp.675-680
  13. Omine, K. Ochiai, H. and Yoshida, N. (1998), 'Estimation of in-situ strength of cement-treated soils based on a two-phase mixture model', Soils and Foundations, Vol.38, No.4, pp.17-29