Stress-Strain-Time Function of Clay
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 124, Issue 4
Abstract
Undrained creep of clay may cause significant displacement near an excavation site. To investigate the potential undrained creep, two series of constant-stress undrained creep tests were conducted on specimens from tube samples taken near an excavation site. Results from these creep tests performed by both lateral extension and axial compression are presented in this paper. Test results indicate that the characteristics and the amount of creep strain induced by lateral extension are similar to that induced by axial compression. However, pore pressure response of the lateral extension-induced creep is distinctly different from the pore pressure response of the axial compression-induced creep. Based on an extensive review of reported stress-strain-time functions, an alternative creep function that explicitly considers the effects of overconsolidation is developed. Predicted results are in good agreement with the experimental results and results reported in the literature. This study also shows that the creep function developed herein can be adopted to give reasonable predictions of the stress-strain relationship of constant-rate-of-strain tests. However, the present model does not account for strain softening.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Chin, C. T., Cheng, T. Y., and Liu, C. J.(1989). “Relationship between undrained shear strength and overconsolidation ratio of Taipei silt.”J. Chinese Inst. of Civ. and Hydr. Engrg., Taipei, Taiwan, 1(3), 245–250.
2.
Clough, G. W., and Reed, M. W.(1984). “Measured behavior of braced wall in very soft clay.”J. Geotech. Engrg., ASCE, 110(1), 1–19.
3.
Finno, R. J., Atmatzidis, D. K., and Perkins, S. B.(1989). “Observed performance of a deep excavation in clay.”J. Geotech. Engrg., ASCE, 115(8), 1045–1065.
4.
Ladd, C. C., and Foott, R.(1974). “New design procedure for stability of soft clays.”J. Geotech. Engrg. Div., ASCE, 100(7), 763–786.
5.
Lin, H. D., and Wang, C. C. (1995). “Creep effects on deformation of deep excavation.”Proc., 10th Asian Regional Conf. Soil Mech. Found. Engrg., Vol. 1, International Academic Publishers, Beijing, China, 321–324.
6.
Liu, C. J.(1991). “On the undrained strength and pore pressure coefficient of Taipei basin cohesive soils.”J. Chinese Inst. of Civ. and Hydr. Engrg., 3(3), 267–270.
7.
Mathematical modeling of creep and shrinkage of concrete. (1988). Z. P. Bazant, ed., John Wiley & Sons, Inc., New York, N.Y.
8.
Mayne, P. W., and Kulhawy, F. H.(1982). “Ko-OCR relationships in soil.”J. Geotech. Engrg. Div., ASCE, 108(6), 851–872.
9.
Mesri, G., Febres-Cordero, E., Shields, D. R., and Castro, A.(1981). “Shear stress-strain-time behaviour of clays.”Géotechnique, London, U.K., 31(4), 537–552.
10.
Semple, R. M. (1973). “The effect of time-dependent properties of altered rock on the tunnel support requirements,” PhD thesis, University of Illinois, Urbana, Ill.
11.
Sheahan, T. C.(1995). “Interpretation of undrained creep tests in terms of effective stresses.”Can. Geotech. J., Ottawa, Canada, 32, 373–379.
12.
Singh, A., and Mitchell, J. K.(1968). “General stress-strain-time function for soils.”J. Soil Mech. and Found. Div., ASCE, 99(1), 21–46.
13.
Vaid, Y. P., and Campanella, R. G.(1977). “Time-dependent behavior of undisturbed clay.”J. Geotech. Engrg. Div., ASCE, 103(7), 693–709.
14.
Wu, T. H., EI Refai, A. N. A. A., and Hsu, J. R.(1978). “Creep deformation of clays.”J. Geotech. Engrg. Div., ASCE, 104(1), 61–76.
Information & Authors
Information
Published In
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Apr 1, 1998
Published in print: Apr 1998
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.