Model for Large Strain Consolidation by Centrifuge
Publication: International Journal of Geomechanics
Volume 5, Issue 4
Abstract
A numerical model, called CC1, is presented for one-dimensional large strain consolidation in a geotechnical centrifuge. The model includes all the capabilities of a previous large strain consolidation code, CS2, written for surcharge loading under normal gravity conditions. In addition, CC1 accounts for variation of acceleration factor over the depth of a centrifuge test specimen. The development of CC1 is first presented, followed by a comparison of simulated time–settlement curves with experimental measurements for Singapore marine clay and a parametric study illustrating the effects of nonuniform distribution on centrifuge consolidation behavior. Simulations indicate that the effect of spatially varying is most strongly controlled by the ratio of specimen height to centrifuge arm length and that the error associated with the assumption of constant is relatively small if this ratio is 0.2 or less. Finally, CC1 is used to calculate the optimal location within a centrifuge specimen of Singapore marine clay at which to match the desired value and the error that results if is matched at the initial midheight of the specimen.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The experimental centrifuge consolidation data for Singapore marine clay was graciously provided by Dr. R. G. Robinson, Research Fellow in the Department of Civil Engineering at the National University of Singapore. The contribution of this high-quality data for our research is gratefully acknowledged. Financial support for this investigation was provided in part by the U.S. National Oceanic and Atmospheric Administration through the Ohio Sear Grant College Program. Financial support for graduate study of the third writer has been provided by Vijay K. Dhir, Dean of the Henry Samueli School of Engineering and Applied Science, and William W.-G. Yeh, Professor and Chair of the Department of Civil and Environmental Engineering, of the University of California–Los Angeles.
References
Al-Tabbaa, A., and Wood, D. M. (1987). “Some measurements of the permeability of kaolin.” Geotechnique, 37(4), 499–503.
Bear, J. (1972). Dynamics of fluids in porous media, Elsevier, New York.
Bloomquist, D. G., and Townsend, F. C. (1984). “Centrifugal modeling of phosphatic clay consolidation.” Proc., Symp. on Sedimentation/Consolidation Models: Prediction and Validation, R. N. Yong and F. C. Townsend, eds., ASCE, New York, 565–580.
Croce, P., Pane, V., Znidarcic, D., Ko, H.-Y., Olsen, H. W., and Schiffman, R. L. (1985). “Evaluation of consolidation theories by centrifuge modeling.” Application of centrifuge modeling to geotechnical design, W. H. Craig, ed., Balkema, Rotterdam, The Netherlands, 381–402.
Fox, P. J. (1999). “Solution charts for finite strain consolidation of normally consolidated clays.” J. Geotech. Geoenviron. Eng., 125(10), 847–867.
Fox, P. J., and Berles, J. D. (1997). “CS2: A piecewise-linear model for large strain consolidation.” Int. J. Numer. Analyt. Meth. Geomech., 21(7), 453–475.
Hubbert, M. K. (1940). “The theory of ground water motion.” J. Geol., 48, 785–944.
Ilyas, T., Leung, C. F., Chow, Y. K., and Budi, S. S. (2004). “Centrifuge model study of laterally loaded pile groups in clay.” J. Geotech. Geoenviron. Eng., 130(3), 274–283.
Lee, J., and Fox, P. J. (2005). “Efficiency of seepage consolidation for preparation of clay substrate for centrifugge testing.” Geotech. Test. J., 28(6), 577–585.
Kimura, T., Kusakabe, O., Takemura, J., and Saitoh, K. (1984). “Preparation of a normally consolidated clay stratum in a centrifuge.” Soils Found., 24(4), 71–83.
McVay, M., Townsend, F., and Bloomquist, D. (1986). “Quiescent consolidation of phosphatic waste clays.” J. Geotech. Eng., 112(11), 1033–1049.
Mikasa, M., and Takada, N. (1984). “Selfweight consolidation of very soft clay by centrifuge.” Proc., Symp. on Sedimentation/Consolidation Models: Prediction and Validation, R. N. Yong and F. C. Townsend, eds., ASCE, New York, 121–140.
Nagaraj, T. S., Pandian, N. S., and Narasimha, Raju P. S. R., (1994). “Stress-state-permeability relations for overconsolidated clays.” Geotechnique, 44(2), 349–352.
Robinson, R. G., Tan, T. S., and Lee, F. H. (2003). “A comparative study of suction-induced seepage consolidation versus centrifuge consolidation.” Geotech. Test. J., 26(1), 92–101.
Schiffman, R. L., Pane, V., and Sunara, V. (1985). “Sedimentation and consolidation.” Proc., Engineering Foundation Conf.: Flocculation, Sedimentation, and Consolidation, B. M. Moudgil and P. Somasundaran, eds., Sea Island, Ga., 57–121.
Schofield, A. N. (1980). “Cambridge geotechnical centrifuge operations,” Geotechnique, 30(3), 227–268.
Sharma, J. S., and Bolton, M. D. (2001). “Centrifugal and numerical modeling of reinforced embankments on soft clay installed with wick drains.” Geotext. Geomembr., 19(1), 23–44.
Taylor, R. N. (1995). “Centrifuges in modeling: Principles and scale effects.” Chap. 2, Geotechnical centrifuge technology, R. N. Taylor, ed., Blackie Academic & Professional, London, 19–33.
You, Z., and Znidarcic, D. (1994). “Initial stage of soft soil consolidation.” Proc., Centrifuge ’94, Balkema, Rotterdam, The Netherlands, 399–403.
Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 5 • Issue 4 • December 2005
Pages: 267 - 275
Copyright
© 2005 ASCE.
History
Received: Jul 9, 2004
Accepted: Dec 7, 2004
Published online: Dec 1, 2005
Published in print: Dec 2005
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.