Browse > Article

Strain-rate-dependent Consolidation Characteristics of Busan Clay  

Kim Yun-Tae (Dept. of Ocean Engrg., Pukyong National Univ.,)
Jo Sang-Chan (Dept. of Ocean Engrg., Pukyong National Univ.,)
Jo Gi-Young (Busan Urban Dvelopment Corporation)
Publication Information
Journal of the Korean Geotechnical Society / v.21, no.6, 2005 , pp. 127-135 More about this Journal
Abstract
In order to analyze effects of strain rate on consolidation characteristics of Busan clay, a series of constant rate of strain (CRS) consolidation tests with different strain rate and incremental loading tests (ILT) were performed. From experimental test results on Busan clay, it was found that the preconsolidation pressure was dependent on the corresponding strain rate occurring during consolidation process. Also, consolidation curves normalized with respect to preconsolidation pressure gave a unique stress-strain curve. Coefficient of consolidation and permeability estimated from CRS test had a tendency to converge to a certain value at normally consolidated range regardless of strain rate. An increase in excess pore pressure was observed after the end of loading without change of total stress on the incremental loading test, which phenomenon is called Mandel-Cryer effect. It was also found that rapid generation of excess pore pressure took place due to collapse of soil structure as effective stress approached to preconsolidation pressure.
Keywords
Consolidation; CRS test; Incremental loading test; Prconsolidation pressure; Strain rate;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 김윤태, S. Leroueil (1999), '자연점토의 변형률속도 의존적인 압밀거동의 해석', 한국지반공학회 논문집, 제15권, 제6호
2 Taylor, D.W. (1942), Research on consolidation of clays, Series 82, MIT, Cambridge, Mass
3 Wissa, A.E.Z.,Christian, J.T.,Davis, E.H. and Heilberg, S. (1971), Consolidation at Constant Rate of Strain, Journal of Soil Mechanics and Foundation Division, ASCE, Vol.97, No.SM10, pp.1393-1413
4 Jun-Gao Zhu and Jian-Hua Yin (2001), 'Deformation and pore-water pressure of elastic viscoplastic soil', J. Engrg. Mech., Volume 127, Issue 9, pp.899-908   DOI   ScienceOn
5 Schiffinan, R. L., Chen, T.-F. A., and Jordan, J. C. (1969), 'An analysis of consolidation theory', J. Soil Mech. and Found. Div., ASCE, 95(1), 285309
6 Casagrande, A. (1936), 'The Determination of the Preconsolidation Load and Its Practical Significance', Proceedings of 1st ICSMFE, Cambridge, Vol.3, pp.60-64
7 Bjerrum, L. (1967), 'Engineering geology of normally consolidated marine clays as related to the settlements of buildings', Geotechnique, Vol.17, No.2, pp.83-119   DOI
8 Crawford, C. B.: State of the Art-Evaluation and Interpretation of Soil Consolidation Tests, Consolidation of Soil: Testing and Evaluation, ASTM STP 892, R.N. Yong and F.C. Townsend
9 이우진, 임형덕, 이원제 (1998), '일정변형률 및 표준압밀시험을 이용한 해성점토의 압밀특성 연구', 한국지반공학회, 제14권, 제4호
10 Yin, J.-H., Clark, J. I., Blasco, B. M., and Graham, J. (1993), 'Mechanismand modeling of abnormal excess orewater pressure in clays and applications in offshore engineering', Proc., 4th Can. Conf. Marine Geotech, Engrg., Vol.2, 401424
11 Leroueil, S., and Kabbaj, M., and 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
12 Kabbaj, M., Tavenas, F., and Leroueil, S. (1988), 'In situ and laboratory stress-strain relationships', Geotechnique 38, No.1, pp. 83-100   DOI   ScienceOn
13 Leroueil, S., M. Kabbaj, and F. Tavenas (1998), 'Study of the validity of ${\sigma} model in in situ conditions', Soils and Foundations, Vol.28, No.3, pp.13-25
14 Yoshikuni H., Nishiumi H., Ikegami S., and Seto K. (1994), 'The creep and effective stress-relaxation behavior on one-dimensional consolidation (in Japanese)', 29th Japan National Conf. on Soil Mechanics and Found. Engrg., Vol.29, pp.269-270
15 Yoshikuni H., Nishiumi H., Ikegami S., and Seto k. (1994), The creep and effective stress relaxation behavior on one-dimentional consolidation (in japanese), 29th Japan National Conf. on soil Mechanics and Found. Engrg., Vol.29, pp.269-270
16 Chang, Y.C.E. (1981), 'Long term consolidation beneath the test fill at Vasby, Sweden', Swedish Geotechnical Institute, Report 13, Linkoping, Sweden
17 Janbu, N. (1969), 'The resistance Concept Applied to Deformation of Soils', Proceedings of 6th lCSMFE, Mexico city, Vol.1, pp.191-196
18 Oikawa, H. (1987), 'Compression curve of soft soils', Soils and Foundations, Vol.27, No.3, pp.519-539
19 김영수, 이상웅, 김대만, 현영환 (2004), 'Aging Effect를 고려한 점성토의 압밀특성', 한국지반공학회 논문집, 제20권, 제6호, pp.109-118
20 이 송, 박중배, 채점식 (2001), '연속재하압밀시험방법에 따른 점성토 지반의 압밀특성', 대한토목학회 논문집, 제21권, 3-C호 pp.299-309
21 Becker, D.E., Jefferies, M.G., Shinde, S.B., and Crooke, J.H.A. (1985), 'Porewater pressures in clays below caisson islands', In Proceeding of Arctic '85: Civil Engineering in the Arctic Offshore, San Francisco. pp.75-83
22 Crawford, C.B. (1965), 'The resistance of soil structure to consolidation', Canadian Geotechnical Journal, VoI.2(2), pp.90-97   DOI
23 김윤태 (2003), '지반개량 및 미개량 연약지반의 해석', 한국지반공학회 연약지반 기술위원회 2003 학술세미나, Seoul, Korea, pp.73-95
24 ASTM Designation, D4186-82, Standard Test Method for One dimensional Consolidation Properties of Soils using Controlled Strain, Loading