Abstract
The main goal of this paper is to present the first results of a study performed to provide insights into the relationship between the hydromechanical stress path experienced by a compacted soil and the modification of its pore space geometry. A new oedometer employing the axis translation technique was used to characterize the hydromechanical behaviour of the tested material. The fabric of the tested samples was determined using the mercury intrusion porosimetry technique under 4 stress levels and two different suctions. From this information, the macro and micropore volume variations were then determined. The results showed that mechanical loading produced a progressive reduction of the macropore volume and a significant increase of the micropore volume beyond a stress of 250 kPa. The obtained results tend to demonstrate that suction strengthens soil fabric, as the initial “double structure” of the tested material was not destroyed in the case of the unsaturated sample by the loading up to 1 000 kPa, whereas, the saturated sample exhibited a more homogenous fabric.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Al-Mukhtar, M., Belanteur, N., Tessier, D. and Vanapalli, S.K., 1996. The fabric of a clay soil under controlled mechanical and hydraulic stress states. Applied Clay Science, 11, pp. 99–115.
Alonso, E.E., Gens, A. and Josa, A., 1990. A constitutive model for partially saturated soils. Géotechnique, 40, pp. 405–430.
Brustaert, W., 1968., The permeability of a porous medium determined from certain probability laws for pore-size distribution. Water Resources Research, 4, pp. 425–434.
Collins, K. and Mcgown, A., 1974. The form and function of microfabric features in a variety of natural soils. Géotechnique, 24, pp. 223–254.
Cuisinier, O. 2002. Hydromechanical behaviour of compacted swelling soils (in french). PhD thesis, INPL, Nancy, France, 165 p.
Delage, P. And Lefebvre, G., 1984. Study of the structure of a sensitive Champlain clay and of its evolution during consolidation. Canadian Geotechnical Journal, 21, pp. 21–35.
Geiser, F. 1999. Mechanical behaviour of an unsaturated silt — Experimental study and constitutive modelling (in French). PhD thesis, Lausanne, Switzerland, 224 p.
Gens, A. And Alonso, E.E., 1992. A framework for the behaviour of unsaturated expansive clays. Canadian Geotechnical Journal, 29, pp. 1013–1032.
Griffiths, F.J. And Joshi, R.C., 1989. Change in pore size distribution due to consolidation of clays. Géotechnique, 39, pp. 159–167.
Juang, C.H. and Holtz, R.D., 1986, A probabilistic permeability model and the pore size density function, Int. Journal of Numerical and Analytical Methods in Geomechanics, 10, 543–553.
Lambe, T.W., 1958, The engineering behaviour of compacted clays, Journal of the Soil Mechanics and Foundation Division, ASCE, 84, pp. 1–35.
Lapierre, C., Leroueil, S. and Locat, J., 1990. Mercury Intrusion and Permeability of Louisville clay, Canadian Geotechnical Journal, 27, pp. 761–773.
Leroueil, S. and Vaughan, P.R., 1990. The general and congruent effects of structure in natural soils and weak rocks. Géotechnique, 40, pp. 467–488.
Penumadu, D. and Dean, J., 2000. Compressibility effect in evaluating the pore size distribution of kaolin clay using mercury intrusion porosimetry, Canadian Geotechnical Journal, 37, pp. 393–405.
Qi, Y., Al-Mukhtar, M., Alcover, J.F. and Bergaya, F., 1996. Coupling analysis of macroscopic and microscopic behaviour in highly consolidated Na-laponite clays. Applied Clay Science, 11, pp. 185–197.
Richard, G., Cousin, I., Sillon, J.F., Bruand, A., and Guérif, J., 2001. Effect of compaction on the porosity of a silty soil: influence on unsaturated hydraulic properties. European Journal of Soil Science, 52, pp. 49–58.
Simms, P.H. and Yanful, E.K., 2001. Measurement and estimation of pore shrinkage and pore distribution in a clayey till during soil-water characteristic curve tests, Canadian Geotechnical Journal, 38, pp. 741–754.
Sivakumar, V. and Wheeler, S.J., 2000. Influence of compaction procedure on the mechanical behaviour of an unsaturated compacted clay. Part 1: wetting and isotropic compression, Géotechnique, 50, pp. 359–368.
Yong, R.N. and Warkentin, B.P., 1975. Soil properties and behavior. Developments in Geotechnical Engineering, 5. 449 p.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2005 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Cuisinier, O., Laloui, L. (2005). Fabric Evolution of an Unsaturated Compacted Soil during Hydromechanical Loading. In: Schanz, T. (eds) Unsaturated Soils: Experimental Studies. Springer Proceedings in Physics, vol 93. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-26736-0_12
Download citation
DOI: https://doi.org/10.1007/3-540-26736-0_12
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-21121-1
Online ISBN: 978-3-540-26736-2
eBook Packages: EngineeringEngineering (R0)