Accumulated Permanent Axial Strain of a Subgrade Fill under Cyclic High-Speed Railway Loading
Publication: International Journal of Geomechanics
Volume 18, Issue 5
Abstract
The ballastless track system (BTS) is widely adopted in the construction of high-speed railways (HSRs), in which the vehicle-induced cyclic stresses are evenly transferred to subgrade at a smaller amplitude compared with the conventional ballast track system. In this study, both static and cyclic triaxial tests were performed on a subgrade fill procured from a HSR construction site in Mainland China. The subgrade fill contained high fine content (d < 0.075 mm). The stress-strain-strength relationship from static tests provided a reference for the cyclic tests. The permanent axial strain and resilient modulus under cyclic HSR loading were studied based on the stress levels in the field. Based on the test data, a new empirical equation is proposed to predict the accumulated permanent axial strain with cycle number and low cyclic deviator stress. A new method for determining all parameters in this equation is proposed and verified by fitting test data. The results show that the predictions from the newly proposed relationship are in good agreement with the experimental results. The resilient behavior of the fill under cyclic loading is also investigated. It is found that under low-stress levels the resilient modulus slightly decreases with the increase of stresses, which is not well described by existing models.
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Acknowledgments
The work in this paper is supported by a Key Project Grant (Grant U1234204) from the National Natural Science Foundation of China via the PolyU Shenzhen Research Institute, and The Hong Kong Polytechnic University, China.
References
AASHTO. (2007). Standard method of test for determining the resilient modulus of soils and aggregate material, Washington, DC.
Baldi, G., and Nova, R. (1984). “Membrane penetration effects in triaxial testing.” J. Geotech. Engrg., 403–420.
Barksdale, R. D., and Itani, S. Y. (1989). “Influence of aggregate shape on base behaviour.” Transp. Res. Rec., 1227, 173–182.
Borana, L., Yin, J. H., Singh, D. N., and Shukla, S. K. (2015). “A modified suction-controlled direct shear device for testing unsaturated soil and steel plate interface.” Mar. Georesour. Geotec., 33(4), 289–298.
BSI (British Standards Institute). (1990). “Methods of test for soils for civil engineering purposes.” BS 1377, London.
Chen, R. P., Zhou, W. H., and Chen, Y. M. (2009). “Influences of soil consolidation and pile load on the development of negative skin friction of a pile.” Comput. Geotech., 36(8), 1265–1271.
Guo, J. H. (2012). “Study on dynamic response of granular type A and type B fillings of high speed railway.” Soil Eng. Found., 26(10), 116–120 (in Chinese).
Hicks, R. G., and Monismith, C. L. (1971). “Factors influencing the resilient properties of granular materials.” High. Res. Rec., 345, 15–31.
Indraratna, B., Lackenby, J., and Christie, D. (2005). “Effect of confining pressure on the degradation of ballast under cyclic loading.” Géotechnique, 55(4), 325–328.
Jiang, Y., Han, J., and Zheng, G. (2014). “Numerical analysis of a pile-slab-supported railway embankment.” Acta Geotech., 9(3), 499–511.
Lackenby, J., Indraratna, B., McDowell, G., and Christie, D. (2007). “Effect of confining pressure on ballast degradation and deformation under cyclic triaxial loading.” Géotechnique, 57(6), 527–536.
Lekarp, F., and Dawson, A. (1998). “Modelling permanent deformation behaviour of unbound granular materials.” Constr. Build. Mater., 12(1), 9–18.
Ministry of Railway. (2009). “Code for design of high speed railway.” TB 10020, Beijing.
Monismith, C. L., Seed, H. B., Mitry, F. G., and Chan, C. K. (1967). “Prediction of pavement deflections from laboratory tests.” Proc., 2nd Int. Conf. on the Structural Design of Asphalt Pavements, Univ. of Michigan Ann Arbor, MI, 109–140.
Qu, C. Z., Wang, Y. H., Wei, L. M., and Guo, Z. G. (2012). “In-situ test and analysis of vibration of subgrade for Wuhan-Guangzhou high-speed railway.” Rock Soil Mech., 33(5), 1451–1461 (in Chinese).
Raymond, G., and Williams, D. (1978). “Repeated load triaxial tests on a dolomite ballast.” J. Geotech. Engrg. Div., 104(7), 1013–1029.
Thakur, P. K., Vinod, J. S., and Indraratna, B. (2013). “Effect of confining pressure and frequency on the deformation of ballast.” Géotechnique, 63(9), 786–790.
Thom, N. H. (1988). “Design of road foundation.” Ph.D. thesis, Univ. of Nottingham, Nottingham, U.K.
Uzan, J. (1985). “Characterization of granular material.” Transp. Res. Rec., 1022, 52–59.
Vallerga, B. A., Seed, H. B., Monismith, C. L., and Cooper, R. S. (1956). “Effect of shape, size and surface roughness of aggregate particles on the strength of granular materials.” Proc., Symp. on Road and Paving Materials, 212, American Society for Testing and Materials, Philadelphia, 63–76.
Yau, A., and Von Quintus, H. L. (2002). “Study of LTPP laboratory resilient modulus test data and response characteristic.” Final Rep. FHWA-RD-02-051, Federal Highway Administration, U.S. Dept. of Transportation, Washington, DC.
Ye, Y. S. (2004). “Discussion on the classification of railway subgrade fills.” China Railway Sci., 25(2), 35–40 (in Chinese).
Yideti, T. F., Birgisson, B., Jelagin, D., and Guarin, A. (2013). “Packing theory-based framework to evaluate permanent deformation of unbound granular materials.” Int. J. Pavement Eng., 14(3), 309–320.
Yin, J. H. (1999). “Non-linear creep of soils in oedometer tests.” Géotechnique, 49(5), 699–707.
Zhan, Y. X., and Jiang, G. L. (2010). “Study of dynamic characteristics of soil subgrade bed for ballastless track.” Rock Soil Mech., 31(2), 392–396 (in Chinese).
Zhao, L. S., Zhou, W. H., Fatahi, B., Li, X. B., and Yuen, K.-V. (2016). “A dual beam model for geosynthetic-reinforced granular fill on an elastic foundation.” Appl. Math. Modell., 40(21–22), 9254–9268.
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Published In
International Journal of Geomechanics
Volume 18 • Issue 5 • May 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Mar 30, 2017
Accepted: Oct 26, 2017
Published online: Feb 22, 2018
Published in print: May 1, 2018
Discussion open until: Jul 22, 2018
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