Deformation of Coal Fouled Ballast Stabilized with Geogrid under Cyclic Load
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VIEW THE REPLYPublication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 139, Issue 8
Abstract
This paper presents the results of laboratory investigations into the deformation of coal fouled ballast stabilized with geogrid at various degrees of fouling. A novel track process simulation apparatus was used to simulate realistic rail track conditions subjected to cyclic loading, and the void contamination index (VCI) was used to evaluate the level of ballast fouling. The experimental results show that coal fines act as a lubricant, causing grains of ballast to displace and rotate, and as a result, accelerate its deformation. However, coal fines also reduce ballast breakage because of a cushioning effect, that is, by reducing interparticle attrition. The inclusion of geogrid at the interface between the layer of ballast and subballast provides additional internal confinement and particle interlocking via geogrid apertures, which reduces deformation. A threshold value of is proposed to assist practitioners for conducting track maintenance. If the level of fouling exceeds this threshold, the geogrid reinforcement significantly decreases its effectiveness and the fouled ballast exhibits a premature dilation. Based on the experimental results, an equation incorporating the VCI was proposed to predict the deformation of fresh and fouled ballast. This equation improves track design and assists in favorable decision support for track maintenance. Additionally, the discrete element method (DEM) was also used to capture the deformation of fouled ballast subjected to cyclic loading, whereas the DEM results were compared with experimental observations.
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Acknowledgments
The authors are grateful for the financial support provided by the Cooperative Research Centre for Rail Innovation. The authors also thank Jayan Sylaja Vinod for his helpful discussions and guidance on DEM simulation. Laboratory assistance from Alan Grant and Ian Bridge is also very much appreciated.
References
Atalar, C., Das, B. M., Shin, E. C., and Kim, D. H. (2001). “Settlement of geogrid-reinforced railroad led to failure due to cyclic load.” Proc. 15th Int. Conf. Soil Mech. Geotech. Eng., 3, 2045–2048.
Australian Standard. (1996). “Aggregates and rock for engineering purposes; Part 7: Railway ballast.” AS 2758.7 Sydney, Australia.
Bathurst, R. J., and Raymond, G. P. (1987). “Geogrid reinforcement of ballasted track.” Transportation Research Record 1153, Transportation Research Record, Washington, DC.
Brown, S. F., Kwan, J., and Thom, N. H. (2007). “Identifying the key parameters that influence geogrid reinforcement of railway ballast.” J. Geotext. Geomembr., 25(6), 326–335.
Brown, S. F., Thom, N. H., and Kwan, J. (2006). “Optimising the geogrid reinforcement of rail track ballast.” Railway Foundations: Proc., Railfound 06, Univ. of Birmingham, Birmingham, UK, 346–354.
Budiono, D. S., McSweeney, T., Dhanasekar, M., and Gurung, N. (2004). “The effect of coal dust fouling on the cyclic behaviour of railtrack ballast.” Cyclic behaviour of soils and liquefaction phenomena, Taylor & Francis, London, 627–632.
Cundall, P. A., and Strack, O. D. L. (1979). “A discrete numerical model for granular assemblies.” Geotechnique, 29(1), 47–65.
Dombrow, W., Huang, H., and Tutumluer, E. (2009). “Comparison of coal dust fouled railroad ballast behavior—Granite vs. limestone.” Proc., 8th Int. Conf. Bearing Capacity of Roads, Railways and Airfields, Taylor & Francis, London, 1349–1357.
Esveld, C. (2001). Modern railway track, MRT Press, Albert Heijn Zaltbommel, Zaltbommel, Netherlands.
Feldman, F., and Nissen, D. (2002). “Alternative testing method for the measurement of ballast fouling.” Conf. Railway Eng., Railway Technical Society of Australasia, Wollongong, Australia, 101–111.
Fernandes, G., Palmeira, E. M., and Gomes, R. C. (2008). “Performance of geosynthetic-reinforced alternative sub-ballast material in a railway track.” Geosynth. Int., 15(5), 311–321.
Göbel, C. H., Weisemann, U. C., and Kirschner, R. A. (1994). “Effectiveness of a reinforcing geogrid in a railway subbase under dynamic loads.” J. Geotext. Geomembr., 13(2), 91–99.
Han, X., and Selig, E. T. (1997). “Effects of fouling on ballast settlement.” Proc., 6th Int. Heavy Haul Conf., IHHA Press, Cape Town, South Africa, 257–268.
Hossain, Z., Indraratna, B., Darve, F., and Thakur, P. K. (2007). “DEM analysis of angular ballast breakage under cyclic loading.” Geomech. Geoeng., 2(3), 175–181.
Huang, H., and Tutumluer, E. (2011). “Discrete element modeling for fouled railroad ballast.” Construct. Build. Mater., 25(8), 3306–3312.
Huang, H., Tutumluer, E. and Dombrow, W. (2009a). “Laboratory characterization of fouled railroad ballast behavior.” Transportation Research Record 2117, Transportation Research Board, Washington, DC.
Huang, H., Tutumluer, E., Hashash, Y. M. A., and Ghaboussi, J. (2009b). “Discrete element modeling of aggregate behavior in fouled railroad ballast.” Geotechnical Special Publication No. 192, ASCE, Reston, VA, 33–41.
Indraratna, B., Khabbaz, H., Salim, W., and Christie, D. (2006). “Geotechnical properties of ballast and the role of geosynthetics in rail track stabilisation.” J. Ground Improve., 10(3), 91–102.
Indraratna, B., Lackenby, J., and Christie, D. (2005). “Effect of confining pressure on the degradation of ballast under cyclic loading.” Geotechnique, 55(4), 325–328.
Indraratna, B., Ngo, N. T., and Rujikiatkamjorn, C. (2011a). “Behavior of geogrid-reinforced ballast under various levels of fouling.” J. Geotext. Geomembr., 29(3), 313–322.
Indraratna, B., and Salim, W. (2003). “Deformation and degradation mechanics of recycled ballast stabilised with geosynthetics.” J. Soils Found., 43(4), 35–46.
Indraratna, B., Salim, W., and Christie, D. (2002). “Perfomance of recycled ballast stabilised with geosynthetics.” Conf. Railway Eng., Railway Technical Society of Australasia, Wollongong, Australia, 113–120.
Indraratna, B., Salim, W. and Rujikiatkamjorn, C. (2011b). Advanced rail geotechnology—Ballasted track, CRC Press, London.
Indraratna, B., Thakur, P. K., and Vinod, J. S. (2010). “Experimental and numerical study of railway ballast behaviour under cyclic loading.” Int. J. Geomech., 10(4), 136–144.
Itasca. (2003). Particle flow code in two and three dimensions, Itasca Consulting Group, Minneapolis, MN.
Konietzky, H., te Kamp, L., and Groeger, T. (2004). “Use of DEM to model the interlocking effect of geogrids under static and cyclic loading.” Numerical modeling in micromechnics via particle methods, Taylor & Francis, London, 3–11.
LabVIEW 10.0 [Computer software]. North Ryde, NSW, Australia, National Instruments.
Lackenby, J., Indraratna, B., McDowell, G. R., and Christie, D. (2007). “Effect of confining pressure on ballast degradation and deformation under cyclic triaxial loading.” Geotechnique, 57(6), 527–536.
Le Pen, L. (2008). “Track behaviour: The importance of the sleeper to ballast interface.” Ph.D. thesis, Univ. of Southampton, Southampton, U.K.
Lim, W. L., and McDowell, G. R. (2005). “Discrete element modelling of railway ballast.” Granul. Matter, 7(1), 19–29.
Lobo-Guerrero, S., and Vallejo, L. E. (2005). “Discrete element method evaluation of granular crushing under direct shear test condition.” J. Geotech. Geoenviron. Eng., 131(10), 1295–1300.
Lu, M., and McDowell, G. R. (2006). “Discrete element modelling of ballast abrasion.” Geotechnique, 56(9), 651–655.
Lu, M., and McDowell, G. R. (2008). “Discrete element modelling of railway ballast under triaxial conditions.” Geomech. Geoeng., 3(4), 257–270.
Lu, M., and McDowell, G. R. (2010). “Discrete element modelling of railway ballast under monotonic and cyclic triaxial loading.” Geotechnique, 60(6), 459–467.
McDowell, G. R., Harireche, O., Konietzky, H., Brown, S. F., and Thom, N. H. (2006). “Discrete element modelling of geogrid-reinforced aggregates.” Proc., ICE Geotech. Eng., 159(1), 35–48.
Palmeira, E. M. (2009). “Soil-geosynthetic interaction: Modelling and analysis.” J. Geotext. Geomembr., 27(5), 368–390.
Qian, Y., Han, J., Pokharel, S. K., and Parsons, R. L. (2010). “Experimental study on triaxial geogrid-reinforced bases over weak subgrade under cyclic loading.” GeoFlorida 2010: Advances in Analysis, Modeling and Design (Geotechnical Special Publication 199), ASCE, Reston, VA, 1208–1216.
Raymond, G., and Ismail, I. (2003). “The effect of geogrid reinforcement on unbound aggregates.” J. Geotext. Geomembr., 21(6), 355–380.
Raymond, G. P. (2002). “Reinforced ballast behaviour subjected to repeated load.” J. Geotext. Geomembr., 20(1), 39–61.
Raymond, G. P., and Bathurst, R. J. (1994). “Repeated-load response of aggregates in relation to track quality index.” Can. Geotech. J., 31(4), 547–554.
Selig, E. T., and Waters, J. M. (1994). Track geotechnology and substructure management, Thomas Telford, London.
Shenton, M. J. (1975). “Deformation of railway ballast under repeated loading conditions.” Proc., Railroad Track Mech. Tech., M. Kerr, ed., Princeton Univ., 387–404.
Shin, E. C., Kim, D. H., and Das, B. M. (2002). “Geogrid-reinforced railroad bed settlement due to cyclic load.” Geotech. Geol. Eng., 20(3), 261–271.
Shukla, S. K. and Yin, J. (2006). Fundamentals of geosynthetics engineering, Taylor & Francis, London.
Timoshenko, S. P., and Goodier, J. N. (1970). Theory of elasticity, McGraw Hill, New York.
Tutumluer, E., Dombrow, W., and Huang, H. (2008). “Laboratory characterization of coal dust fouled ballast behavior.” AREMA 2008 Annual Conf. and Exposition, AREMA Press, Chicago.
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© 2013 American Society of Civil Engineers.
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Received: Jan 18, 2012
Accepted: Nov 15, 2012
Published online: Nov 19, 2012
Published in print: Aug 1, 2013
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