Strength Correlation Factor for Residual Soils
Publication: Journal of Geotechnical Engineering
Volume 118, Issue 4
Abstract
Complete weathering of parent rock has resulted in the formation of residual soils that cover most of the land area of Sri Lanka. The physiography of the island demands that new engineering structures be located on sloping ground, thus posing many problems. The residual soils are heterogeneous due to variable weathering of the jointed rock mass. The heterogeneity of residual soils is due to the influence of relict joints, presence of boulders, and variability of the soil matrix. The repercussion of this heterogeneity is that properties of small samples of residual soils are unrepresentative of the mass, thus rendering conventional methods of field testing, laboratory testing, and analysis procedures for slope stability unsuitable. Heretofore, there have been no testing and analytical models available to represent residual soils. This paper describes an alternative method to predict shear strength parameters of residual soils by a correlation factor obtained from a multistage triaxial test and conventional slope stability analysis. Three landslides were investigated and analyzed to obtain the field shear strength parameters using the back analysis technique. On comparison with laboratory strength parameters, obtained from multistage triaxial tests, a correlation factor was ascertained. This correlation factor can be used to modify laboratory shear‐strength parameters to obtain field shear‐strength values of residual soils for design purposes.
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References
1.
Brand, E. W., and Phillipson, H. P. (1985). “Review of international practice for the sampling and testing of residual soils.” Conf. on Sampling and Testing of Residual Soils: A Review of International Practice, Scorpion Press, Hong Kong, 7–21.
2.
Bromhead, E. N. (1986). Stability of slopes. Chapman and Hall, New York, N.Y.
3.
Chandler, R. J. (1977). “Back analysis technique for slope stabilization work: A case record.” Geotechnique, London, England, 27(4), 479–495.
4.
Gidigasu, M. D. (1970). Laterite soil engineering: Pedogenesis and engineering principles. Oxford University Press, New York, N.Y.
5.
Hutchinson, J. N. (1961). “A landslide on a thin layer of quick clay at Furre, central Norway.” Geotechnique, London, England, XI(2), 69–92.
6.
Lovell, C. W., Sharma, S. S., and Capenter, J. R. (1984). “Slope stability analysis with STABL4.” Joint Hwy. Res. Report No. JHRP‐84‐19, Purdue University, West Lafayette, Ind.
7.
“Methods of testing soil for Civil engineering purposes.” (1975). BS 1377. British Standards Inst. London, England.
8.
Sangrey, D. A., and Paul, M. J. (1971). “A regional study of landsliding near Ottawa.” Canadian Geotech. J., 8(2), 315–335.
9.
Singh, B., and Ramasamy, G. (1979). “Back analysis of natural slopes for evaluation of strength parameters.” Proc. Int. Conf. on Computer Applications in Civ. Engrg., University of Roorkee, Roorkee, India, Vol. 1, VII‐57.
10.
Sridharan, A. M., and Narasimha Rao, S. (1972). “New approach to multi‐stage triaxial test.” J. Soil Mech. and Found. Engrg. Div., 98(11), 1279–1286.
11.
Thurairajah, A., and Wijeyakulasuriya, V. (1985). “Sampling and testing of residual soils in Sri Lanka.” Conf. on Sampling and Testing of Residual Soils: A review of International Practice, Scorpion Press, Hong Kong, 169–173.
12.
Thurairajah, A. (1988). “Slope movements and stability analysis.” Proc. UNDP/UNCHS Training Program for the Members of the District Landslide Monitoring Unit. National Building Research Organization (NBRO), Colombo, Sri Lanka.
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Copyright © 1992 ASCE.
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Published online: Apr 1, 1992
Published in print: Apr 1992
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