Elastoplastic Model for Cemented Soils
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 127, Issue 8
Abstract
This paper presents a model for bonded or cemented soils within the framework of hardening plasticity. The model is based on the concepts that (1) the strength of a cemented soil can be considered to be made up of two components, the usual strength of the soil skeleton and the strength of cementation bonds; and (2) the deformation of the soil is associated with the component of stresses on the soil skeleton (excluding the bonds), as in a reconstituted soil, whereas the cement bonds offer additional resistance at any given strain level. The overall response of the soil under loading can be visualized as two stiffnesses acting in parallel for the given unit strain. Separate stress-strain relations are defined for the two components and they are then combined to give the overall response. The stress-strain relationship for the soil skeleton component is described here using the modified Cam-clay model. A simple model within the elastoplastic framework is proposed for the “cemented” component. The cemented component incorporates strain softening. The input parameters required are minimal, well defined, and easily determined. The model predictions are compared with test data of several soils under drained and undrained triaxial conditions.
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References
1.
Adachi, T., et al. ( 1991). “Triaxial and torsional hollow cylinder tests on sensitive natural clay and an elasto-viscoplastic constitutive model.” Proc., 10th Eur. Conf. on Soil Mech. and Found. Engrg., Vol. 1, 3–6.
2.
Adachi, T., and Oka, F. ( 1995). “An elasto-plastic constitutive model for soft rock with strain softening.” Int. J. Numer. and Analytical Methods in Geomech., 19(4), 233–247.
3.
Anagnostopoulos, A. G., Kalteziotis, N., Tsiambaos, G. K., and Kavvadas, M. ( 1991). “Geotechnical properties of Corinth canal marls.” Geotech. Geological Engrg., London, 9(1), 1–26.
4.
Bozozuk, M. ( 1984). “Study on Gloucester test fill.” Rep., Div. of Build. Res., National Research Council, Ottawa.
5.
Chazallon, C., and Hicher, P. Y. ( 1995). “An elasto-plastic model with damage for bonded geomaterials.” Numerical Models in Geomechanics NUMOG-5 Conf., G. N. Pande and S. Pietruszezak, eds., Balkema, Rotterdam, The Netherlands, 21–26.
6.
Coop, M. R., and Atkinson, J. H. ( 1993). “The mechanics of cemented corbonate sand.” Géotechnique, London, 43(1), 53–67.
7.
Delage, P., and Lefebvre, G. ( 1984). “Study of the structure of a sensitive Champlain clay and its evolution with consolidation.” Can. Geotech. J., Ottawa, 21(1), 21–25.
8.
Gens, A., and Nova, R. ( 1993). “Conceptual bases for a constitutive model for bonded soils and weak rocks.” Proc., Int. Conf. on Hard Soils-Soft Rocks, 485–494.
9.
Kavvadas, M., and Amorosi, A. ( 1998). “A plasticity approach for the mechanical behavior of structured soils.” Proc., 2nd Int. Symp. on Hard Soils-Soft Rocks, 591–602.
10.
Lagioia, R., and Nova, R. ( 1993). “A constitutive model for soft rocks.” Proc., Int. Conf. Hard Soils-Soft Rocks, 625–632.
11.
Lagioia, R., and Nova, R. ( 1995). “An experimental and theoretical study of the behavior of Calcarenite in triaxial compression.” Géotechnique, London, 45(4), 633–648.
12.
Lapierre, C., Leroueil, S., and Locat, J. ( 1989). “Mercury intrusion and permeability of Louiseville clay.” Proc., Can. Geotech. Conf., 23–35.
13.
Leroueil, S., and Vaughan, P. R. ( 1990). “The congruent effects of structure on the behavior of natural soils.” Géotechnique, London, 40(3), 467–488.
14.
Lo, K. Y. ( 1972). “The influence of mechanical disturbance on consolidation of clays.” Proc., South East Asian Regional Conf. on SM&FE, Vol. 1, 223–232.
15.
Nagaraj, T. S., Srinivasa Murthy, B. R., and Vatsala, A. ( 1991). “Prediction of soil behavior—Part 3—Cemented saturated soils.” Indian Geotech. J., New Delhi, 21(2), 169–186.
16.
Nagendra Prasad, K. N. ( 1996). “Constitutive modeling of soft cemented soils.” PhD thesis, Indian Institute of Science, Bangalore, India.
17.
Oka, F., and Adachi, T. ( 1985). “An elasto-plastic constitutive equation of geologic material with memory.” Proc., 5th Int. Conf. on Numer. Methods in Geomechanics, 293–300.
18.
Quigley, R. M., and Thomson, C. D. ( 1966). “The fabric of anisotropically consolidated sensitive marine clay.” Can. Geotech. J., Ottawa, 3(1), 61–73.
19.
Raymond, G. P., Gaskin, P. N., and Addo-Abedi, F. Y. ( 1979). “Repeated compressive loading on Leda clay.” Can. Geotech. J., Ottawa, 16(1), 1–10.
20.
Vatsala, A. ( 1989). “Development of Cam-clay models for overconsolidated and sensitive soils.” Doctoral thesis, Indian Institute of Science, Bangalore, India.
21.
Vatsala, A., Nagaraj, T. S., and Srinivasa Murthy, B. R. ( 1995). “Discussion on `An approximate method for estimating the consolidation behavior of soft sensitive clays.”' Geotech. Testing J., 18(3), 384–388.
22.
Vaughan, P. R. ( 1988). “Keynote paper: Characterizing the mechanical properties of in-situ residual soil.” Proc., 2nd Int. Conf. on Geomechanics in Tropical Soils, Vol. 2, 469–485.
23.
Yong, R. N., and Nagaraj, T. S. ( 1977). “Investigation of fabric and compressibility of a sensitive clay.” Proc., Int. Symp. on Soft Clay, Asian Institute of Technology, Bangkok, Thailand, 327–333.
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Received: Oct 24, 1997
Published online: Aug 1, 2001
Published in print: Aug 2001
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