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EXPERIMENTAL STUDY ON NONLINEAR SHEAR STRENGTH BEHAVIOR OF A TROPICAL GRANITIC RESIDUAL SOIL (GRADE VI) AT VARIOUS INITIAL MOISTURE CONTENTS
Pooya Saffari, Mohd Jamaludin Md Noor, Shervin Motamedi, Roslan Hashim, Zubaidah Ismail, Basharudin Abdul Hadi
The conventional theories of soil mechanics use linear envelope to d this however, leads to an overestimation of the factor of safety in the examination of slopes. Therefore, the incorporation of methods that acknowledge the existence of non-linear characteristics of shear strength is necessary in the analysis of slopes specifically. This is due to the substantial influence of non-linear shear strength behavior on the slope failure mechanism when they are at low stress levels. In this paper, the nonlinearity of shear strength for grade VI granitic residual soil is studied. “Non-Axis Translation Consolidated Drained Triaxial” tests were performed at various ranges of net stress and suction. Thereafter, to characterize shear strength behavior, shear strength parameters were derived. The soil-water characteristic curve was plotted after conducting “Pressure Plate Extractor” test at a series of suction. The result substantiated the non-linearity of shear strength for granitic residual soil based on net stress and suction.
Net stress, suction, unsaturated soil, shear strength, triaxial test
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References
Terzaghi, K. v. 1936. The Shearing Resistance Of Saturated Soils And The Angle Between The Planes Of Shear. Proceedings Of The 1st International Conference On Soil Mechanics And Foundation Engineering. Harvard University Press Cambridge, MA.
Fredlund, D. G., Vanapalli, S. K., Xing, A. and Pufahl, D. E. 1995. Predicting The Shear Strength Function For Unsaturated Soils Using The Soil-Water Characteristic Curve. First International Conference on Unsaturated Soils. Paris, France. 6-8.
Fredlund, D. G., Morgenstern, N. R. and Widger, R. A. 1978. The Shear Strength Of Unsaturated Soils. Canadian Geotechnical Journal. 15(3): 313-321. doi:10..
Charles, J. A. and Watts, K. S. 1980. The Influence Of Confining Pressure On The Shear Strength Of Compacted Rockfill. Geotechnique. 30(4): 353-367. doi: 10.1680/geot..353.
Bishop, A. W. 1966. The Strength Of Soils As Engineering Materials. Geotechnique. doi: 10.1680/geot..91.
Fukushima, S. and Tatsuoka, F. 1984. Strength And Deformation Characteristics Of Saturated Sand At Extremely Low Pressures. Soils And Foundations. 24(4): 30-48. http://doi.org/10.3208/sandf_30.
Indraratna, B., L. Wijewardena, and A. Balasubramaniam. 1993. Large-scale Triaxial Testing Of Greywacke Rockfill. Geotechnique. 43(1): 37-51. http://dx.doi.org/10.1680/geot..539.
Rahardjo, H., Lim, T. T., Chang, M. F. and Fredlund, D. G. 1995. Shear-Strength Characteristics Of A Residual Soil. Canadian Geotechnical Journal. 32(1): 60-77. http://dx.doi.org/10..
Md. Noor, M. J. and M. Hafez 2008. Effective Stress and Complex Soil Settlement Behavior. EJGE. 13.
Md. Noor, M. J. and W. Anderson. 2006. A Comprehensive Shear Strength Model For Saturated And Unsaturated Soils. In Unsaturated Soils 2006. ASCE.
Escario, V. and J. Saez. 1986. The Shear Strength Of Partly Saturated Soils. Geotechnique. 36(3). http://dx.doi.org/10.1680/geot..453.
Rassam, D. W. and D. J. Williams. 1999. A Relationship Describing The Shear Strength Of Unsaturated Soils. Canadian Geotechnical Journal. 36(2): 363-368. http://dx.doi.org/10..
Toll, D. G., Ong, B. H., Rahardjo, H. and Leong, E. C. 2000. Triaxial Testing Of Unsaturated Samples Of Undisturbed Residual Soil From Singapore. In Unsaturated Soils for Asia. Proceedings of the Asian Conference on Unsaturated Soils, UNSAT-Asia. Singapore, 18-19 May, 2000. AA Balkema. 581-586.
Md. Noor, M. J. and B. Hadi. 2010. The Role Of Curved-Surface Envelope Mohr-Coulomb Model In Governing Shallow Infiltration Induced Slope Failure. EJGE. 15.
Kim, J., Jeong, S., Park, S. and Sharma, J. 2004. Influence Of Rainfall-Induced Wetting On The Stability Of Slopes In Weathered Soils. Engineering Geology. 75(3): 251-262. http://dx.doi.org/10.1016/j.enggeo..
Jiang, J.-C., R. Baker, and T. Yamagami. 2003. The Effect Of Strength Envelope Nonlinearity On Slope Stability Computations. Canadian Geotechnical Journal. 40(2): 308-325. http://dx.doi.org/10..
Lee, I.-M., S.-G. Sung, and G.-C. Cho. 2005. Effect Of Stress State On The Unsaturated Shear Strength Of A Weathered Granite. Canadian Geotechnical Journal. 42(2): 624-631. http://dx.doi.org/10..
Rassam, D. W. and C. Freeman. 2002. Predicting The Shear Strength Envelope Of Unsaturated Soils. Geotechnical Testing Journal. 215-220. http://dx.doi.org/10.1520/gtj11365j.
Vanapalli, S. K., Fredlund, D. G., Pufahl, D. E. and Clifton, A. W. 1996. Model For The Prediction Of Shear Strength With Respect To Soil Suction. Canadian Geotechnical Journal. 33(3): 379-392. http://dx.doi.org/10..
Guan, G. S., H. Rahardjo, and L. E. Choon. 2009. Shear Strength Equations For Unsaturated Soil Under Drying And Wetting. Journal Of Geotechnical And Geoenvironmental Engineering. 136(4): 594-606. http://dx.doi.org/10.1061/(asce)gt.00261.
Gan, J. K. and D. Fredlund. 1996. Shear Strength Characteristics Of Two Saprolitic Soils. Canadian Geotechnical Journal. 33(4): 595-609. http://dx.doi.org/10.-307.
Kang, J. B., Shin, B. W., Bang, S. T. and Lee, J. D. 2002. Soil-Water Characteristics of Unsaturated Organic Silty Soils. The Twelfth International Offshore and Polar Engineering Conference. International Society of Offshore and Polar Engineers.
Fredlund, D. G. and A. Xing. 1994. Equations For The Soil-Water Characteristic Curve. Canadian Geotechnical Journal. 31(4): 521-532. http://dx.doi.org/10..The page is temporarily unavailable
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The influence of the grain-size distribution and soil structure on the unsaturated shear strength of loess sediments in Belgrade, Central Serbia
Keywords: ,,,,,
There is a negative pore water pressure or matric suction in the zone above the ground water level in silty loess soil, which can be as deep as 5-10 m in the Belgrade area. This primary characteristic of unsaturated soil, i.e., matric suction, should be included in laboratory testing and geotechnical analyses. Direct shear or triaxial testing of unsaturated soil are very expensive and time-consuming and require specially modified equipment. Instead, the prediction of unsaturated shear strength using the soil water characteristic curve, SWCC, and the effective shear strength parameters c' and φ' is a widely accepted practice. In this study, constitutive soil-water characteristic curves were obtained from the results of experimental testing by draining saturated soil samples under different pressures. This testing was performed for the first time in Serbia in a 15 bar pressure plate extractor according to ASTM standards. The laboratory testing included natural samples of loess sediments with the original macroporous structure and loess sediments with a destroyed soil structure. The influence of the grain-size distribution and natural soil structure on the unsaturated shear strength of Belgrade loess sediments above the ground water level was also evaluated. The obtained results are in accordance with the results from other investigations.
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