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Axisymmetric Nonlinear Consolidation Analysis for Drainage-installed Deposit Considering Secondary Compression  

Kim Yun-Tae (Dept. of Engrg., Pukyung National Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.21, no.3, 2005 , pp. 133-140 More about this Journal
Abstract
In order to accelerate the rate of consolidation settlement and gain a required shear strength for a given soft clay deposit, vertical drain method combined with a preloading technique has been widely applied. In this paper, a theory of axisymmetric nonlinear consolidation fer drainage-installed deposit, which considers secondary compression (or creep) during primary consolidation, as well as the variations of compressibility and permeability during the consolidation process, has been developed. A computer program named AXICON based on Hypothesis B fur the analysis of axisymmetric nonlinear consolidation was developed by adopting finite difference method. The results of AS(ICON were compared with Hansbo's solution based on Hypothesis A, as well as in-situ settlements and pore pressures measured in test embankment of Ska-Edeby. The results indicated that Hypothesis A usually underestimated the in-situ settlement and Hypothesis B was considered to be logically correct. It was also shown that one may able to appropriately predict the real in-situ behaviors using the proposed program.
Keywords
Consolidation; Hypothesis A and B; Secondary consolidation; Vertical drain;
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1 김윤태, Leroueil, S. (1999), 자연점토의 변형률속도 의존적인 압밀거동의 해석, 지반공학회 논문집, 제15권 제6호, 1999년 12월, pp.17-28
2 Ladd, C. C., Foott, R., Ishihara, K., Schlosser, F. & Poulos, H. J. (1977), 'Stress-deformation and strength characteristics', Proc. 9th ICSMFE, Tokyo, pp.421-494
3 Mesri, G. and Rokhsar, A. (1974), 'Theory of consolidation of soils', J. Soil Mech. Found. Eng., ASCE, Vol.100, GT8, pp.889-904
4 Mesri, G. and Choi, Y. K. (1985b), 'The uniqueness of end of primary (EOP) void ratio effective stress relationship', Proc. 11th ICSMFE, San Francisco, pp.587-590
5 Mesri, G. and Choi, Y. K. (1985a), 'Settlement Analysis of Embankments on Soft Clay', J. Geotech. Engrg., ASCE, 111(4), pp.441-464   DOI
6 Jamiolkowski, M., Ladd, C. C., Germaine, J. T., and Lancelotta, R. (1985), 'New developments in field and laboratory testing of soils', General report, Proc. 11th ICSMFE, San Francisco, Vol.1, pp.57-153
7 정성교 (1999), 낙동강 하구 점토의 압밀특성, 연약점토지반에 관한 국제 심포지움,동아대학교
8 Mesri, G., Lo, D. O. K. and Feng, T. W. (1994), 'Settlement of Embankments on Soft Clays', Geotechnical Special Publication, No.40, pp.8-56
9 Leroueil, S. and Kabbaj, M., Tavenas, F., and Bouchard, R. (1985), 'Stress-strain-strain rate relation for the compressibility of natural sensitive clays', Geotechnique, 35(2), 159-180   DOI   ScienceOn
10 Lo, D. O. K (1991), 'Soil Improvement by vertical drains', Ph.D. thesis, Univ. of Illinois, pp.1-279
11 Kim, S. K. (1999), 'Large consolidation settlement occurred during reclamation works in the Nakdong river mouth', Proceeding of '99 Dredging and Geoenvironmental Conference, Seoul, Korea, pp.35-48
12 Leroueil, S. and Marques M. E. S. (1996), 'Importance of Strain Rate and Temperature effects in Geotechnical Engineering: State of the Art', ASCE Convention, Washington, D.C
13 Hansbo, S. (1960), 'Consolidation of Clay with Special Reference to Influence of Vertical Sand Drains', Proc. Swedish Geotechnical Institute, No.18, 160pp
14 Yin, J. H. (2003), 'A simplified method for calculation of settlements of soils with creep based on Hypothesis B', 12th Asian Regional Conf. on Soil Mechanics & Geotechnical Engineering, Vol.1, pp.681-684