Triaxial Tests on Weakly Bonded Soil with Changes in Stress Path
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 127, Issue 3
Abstract
The results are presented of drained triaxial tests on a weakly bonded artificial soil in which the stress path direction has been changed partway through the shearing process. The effects of the previous shearing path history on the yield and failure surfaces are examined. Yield of the bonds occurs under each stress path direction followed, even when yield has previously occurred along another path. This demonstrates that bond breakdown is an anisotropic process. The position of yield was found to be independent of the previous shearing path history of the soil and occurred at points that corresponded to a yield surface defined for the current shearing path direction. However, the previous shearing path history of the soil did significantly affect the failure envelope. It is suggested that the bond yield surface is kinematic, in the sense that it is an expandable/shrinkable surface, but that it is not a moveable surface. It is postulated that the yield surface expands when volumetric strains are compressive and shrinks when the volumetric strains are dilatent.
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References
1.
Atkinson, J. H., Richardson, D., and Stallebrasse, S. E. ( 1990). “Effect of recent stress history on the stiffness of overconsolidated soil.” Géotechnique, London, 40(4), 531–540.
2.
Bishop, A. W., and Wesley, L. D. ( 1975). “A hydraulic triaxial apparatus for controlled stress path testing.” Géotechnique, London, 35(4), 657–670.
3.
Bressani, L. A. ( 1990). “Experimental properties of bonded soils.” PhD thesis, University of London, London.
4.
Jardine, R. J. ( 1992). “Some observations on the kinematic nature of soil stiffness.” Soils and Found., Tokyo, 32(2), 111–124.
5.
Jardine, R. J. ( 1994). “One perspective of the pre-failure deformation characteristics of some geomaterials.” Proc., Int. Symp. on Pre-Failure Deformation Characteristics of Geomaterials, Keynote Lecture 5, S. Shibuya, T. Mitachi, and S. Miura, eds., Preprint Volume, 151–182.
6.
Jardine, R. J., St. John, H. D., Hight, D. W., and Potts, D. M. ( 1991). “Some practical applications of a non-linear ground model.” Proc., 10th Eur. Conf. on Soil Mech., Vol. 1, 223–228.
7.
Leroueil, S., and Vaughan, P. R. ( 1990). “The general and congruent effects of structure in natural soils and weak rocks.” Géotechnique, London, 40(3), 467–488.
8.
Maccarini, M. ( 1987). “Laboratory studies of a weakly bonded artificial soil.” PhD thesis, University of London, London.
9.
Malandraki, V. ( 1994). “The engineering behaviour of a weakly bonded artificial soil.” PhD thesis, University of Durham, Durham, U.K.
10.
Malandraki, V., and Toll, D. G. ( 1994). “Yielding of a weakly bonded artificial soil.” Proc., Int. Symp. on Pre-Failure Deformation Characteristics of Geomaterials, S. Shibuya, T. Mitachi, and S. Miura, eds., Vol. 1, Balkema, Rotterdam, The Netherlands, 315–320.
11.
Malandraki, V., and Toll, D. G. ( 1996). “The defininition of yield for bonded materials.” Geotech. Geological Engrg., Dordrecht, The Netherlands, 14(1), 67–82.
12.
Malandraki, V., and Toll, D. G. ( 2000). “Drained probing triaxial tests on a weakly bonded artificial soil.” Géotechnique, London, 50(2), 141–151.
13.
Toll, D. G. ( 1993). “A computer control system for stress path triaxial testing.” Developments in civil and construction engineering computing, B. H. V. Topping, ed., Civil-Comp Press, Edinburgh, 107–113.
14.
Toll, D. G., and Malandraki, V. ( 1993). “Triaxial testing of a weakly bonded soil.” Proc., Int. Symp. on Geotech. Engrg. of Hard Soils-Soft Rocks, A. Anagnostopoulos, F. Schlosser, N. Kalteziotis, and R. Frank, ed., Vol. 1, Balkema, Rotterdam, The Netherlands, 817–824.
15.
Toll, D. G., and Malandraki, V. ( 2000). “The engineering behaviour of structured soils.” Proc., 1st Central Asian Geotech. Symp., Vol. 2, 629–634.
16.
Vaughan, P. R. ( 1985). “Mechanical and hydraulic properties of in situ residual soils—General Report.” Proc., 1st Int. Conf. on Geomechanics in Tropical Lateritic and Saprolitic Soils, Brasilia, Vol. 3, Brasilian Society for Soil Mechanics, 231–263.
17.
Vaughan, P. R. ( 1988). “Characterising the mechanical properties of the in-situ residual soil.” Proc., 2nd Int. Conf. on Geomechanics in Tropical Soils, Vol. 2, Balkema, Rotterdam, The Netherlands, 469–487.
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Received: Oct 14, 1998
Published online: Mar 1, 2001
Published in print: Mar 2001
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