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Threshold Stress of the Soil Subgrade Evaluation for Highway Formations
Abstract:The objective of this study is to evaluate the threshold stress of the clay with sand subgrade soil. Threshold stress can be defined as the stress level above which cyclic loading leads to excessive deformation and eventual failure. The thickness determination of highways formations using the threshold stress approach is a more realistic assessment of the soil behaviour because it is subjected to repeated loadings from moving vehicles. Threshold stress can be evaluated by plastic strain criterion, which is based on the accumulated plastic strain behaviour during cyclic loadings . Several conditions of the all-round pressure the subgrade soil namely, zero confinement, low all-round pressure and high all-round pressure are investigated. The threshold stresses of various soil conditions are determined. Threshold stress of the soil are 60%, 31% and 38.6% for unconfined partially saturated sample, low effective stress saturated sample, high effective stress saturated sample respectively.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1070435Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2162
 Shahu, J. T., Yudhbir, and Kameswara Rao, N.S.V. 1999. "Effective stress behavior of quasi-saturated compacted cohesive soils." Journal of Geotechnical and Geoenvironmental Engineering, Vol 125 pp. 322-329.
 Huang H. Yang. 1993. Pavement Analysis and Design, Prentice Hall Englewood Cliff, New Jersey.
 Ishihara, K. 1993. Liquefaction and Flow Failure During Earthquakes, The 33rd Rankine Lecture. Geotechnique, Vol. 43, No. 3, pp. 351-415
 Wood, D M. 1982 Laboratory investigations of the behaviour of soils under cyclic loading: A Review. Soil Mechanics- transient and cyclic loads,"Pande, G.N. and Zienkiewicz, O.C (eds) John Wiley and Sons., pp. 513-582
 Brown, S. F. and Dawson, A. R. 1992. Two-stage approach to asphalt pavement design, Proceeding 7th International Conf. Asphalt Pavements, Nottingham.
 ORE. 1970. Question D71; Stresses in the Rails, the Ballast and in the Formations Resulting from Traffic Load, Report no.12; Repeated loading of Clay and Track Foundation Design, Report no. D71 / RP12, Office for Research and Experiments-International Union of Railways Utrecht, Netherlands.
 Cheung, L.W. 1994. Laboratory Assessment of Pavement Foundation Materials. Ph.D. Thesis, University of Nottingham, Nottingham, UK
 Barksdale, R. 1997. Laboratory Determination of Resilient Modulus for Flexible Pavement Design: Final Report, NCHRP Web Doc 14, National Cooperative Highway Research Program, Washington DC.
 Dobry, R., Ladd, R. S., Yokel, F. Y., Chung, R. M., and Powell, D. 1982. Prediction of pore-water pressure buildup and liquefaction of sands during earthquakes by the cyclic strain method. National Bureau of Standards Building Science Series No. 138.
 Matasovic, N. and Vucetic, M. 1995. Generalized Cyclic-Degradation- Pore Pressure Generation Model for Clays, Journal of Geotechnical Engineering, Vol. 121 No.1.
 Shahu, J. T., Yudhbir, and Kameswara Rao, N.S.V. 2000. A Rational Method for Design of Railroad Track Foundation, Soils and Foundations, Japanese Geotechnical Society, Soil and Foundation vol.40.
 Frost, M.W., Fleming, P.R and Rogers, C.D.F. 2004. Cyclic Triaxial Tests on Clay Subgrades for Analytical Pavement Design, Journal Transport Engineering, Volume 130, Issue 3, pp. 378-386 (May/June 2004)
 Attya, A., Indraratna, B., and Rujikiatkamjorn, C. 2007. Cyclic behaviour of PVD-soft soil subgrade for improvement of railway tracks. Proceedings of the 10th Australia New Zealand Conference on Geomechanics, Brisbane, Australia, 21-24 October 2007, 2, 36-41
 Brown, S. F., Lashine,A.K.F., and Hyde, A. F.L. 1975. Repeated load testing of a silty clay. Geotechnique, 25(1) 95-114.
 Yudhbir, Kameswara Rao, N. S. V, and Shahu, J. T. 1995. A Rational Approach to the Design of Railway Formation, Earthquake Geotechnical Engineering, Ishihara (ed.), Balkema
 Elliott, R. P., and Thompson, M. R. 1985. ILLI-PAVE Mechanistic Analysis of AASHO Road Test Flexible Pavements, TRR 1043, TRB, Washington D. C. 39-49.
 Hyde, A. F. L. and Brown, S. F. 1976. The Plastic Deformation of A Silty Clay Under Creep and Repeated Loading, Geotechnique, London, England, 26(1), 173-184.
 Shahu, J. T. 1993. Some Analytical and Experimental Investigations to Study the Behaviour of Soil under Railway Tracks, PhD Thesis of Indian Institute of Technology, at Kanpur India.
 Ansal, A., Iyisan, R, and Yildirim, H. 2001.The Cyclic Behaviour of Soils and Effects of Geotechnical Factors in Microzonation, Soil Dynamics and Earthquake Engineering
 Elliott, R. P., Dennis N. D., and Qiu, Yanjun. 1998. Permanent Deformation of Subgrade Soils, A test Protocol, Department of Civil Engineering University of Arkansas Fayetteville, AR 72701.
 Altun, S., and Goktepe, A. B. 2006. Cyclic Stress-Strain Behaviour of Partially Saturated Soils, ASCE Proceedings of the Fourth International Conference on Unsaturated Soils
 Craig, R.F. 1992. Soil Mechanics, Chapman and Hall, 5th edition, London, UK
 Towhata, Ikuo. 2008. Geotechnical Earthquake Engineering, publisher: , ISBN: 3540357823, 9783540357827
 Diaz-Rodriguez, J. A and L├│pez-Molina, J. A. 2008. Strain Thresholds in Soil Dynamics, the 14 World Conference on Earthquake Engineering, October 12-17, 2008, Beijing, China.
 Yudhbir, Kameswara Rao, N. S. V, and Shahu, J. T. 1998. A Rational View of Track Maintenance, Joint Seminar on Bilateral Co-operation for Railway Research, European Rail Research Institute and Indian Railways, Vigyan Bhawan, New Delhi.
 Larew, H. G., and Leonards, G. A. 1962. A Strength Criterion for Repeated Loads. Proceedings of the Highway Research Board, No. 41, 525-556