Experimental and Numerical Study of Railway Ballast Compactness during Tamping Process

Abstract:

Railway ballast tamping operations is employed in order to restore the geometry of railway track distorted by train traffics. The main goal is to compact the stone ballast under the sleepers supporting the railway squeezing and vibrations. The ballast compactness is the most direct index for evaluating the effect of tamping operation. This paper presents an experimental method used to detect the railway ballast compactness before and after tamping operation based on water-filling method, and creates a discrete element analysis model of railway ballast which analyzes the change of ballast compactness before and after tamping operation based on discrete element method. The simulation results are very similar with experimental results, which verify that the discrete element method is an effective method to evaluate the change of railway ballast compactness during tamping process.

• Periodical: Advanced Materials Research (Volumes 690-693)
• Pages: 2730-2733
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.690-693.2730
• Online since: May 2013
• Authors: Tao Yong Zhou, Bin Hu, Bo Yan, Jun Feng Sun
• Keywords: Ballast Compactness, DEM, Railway Ballast, Tamping, Water-Filling Method

References

[1] W.L. Lim, G.R. McDowell: Granular Matter, Vol. 7, (2005), pp.19-29.

[2] Xiao Hong, Gao Liang, Hou Bowen: Journal of Railway Engineering Society, No. 9, (2009), pp.14-17.

[3] Cundall P.A., Strack O.D.L.: Geotechnique, Vol.29, No.1, (1979), p.47–65.

[4] Saussine G, Azema E, Peales R, Radjai F: Powders and Grains, Vol. 1145, (2009), pp.469-472.

[5] Zhou Taoyong, Hu Bin, Wang Xuejun, Yan Bo: Applied Mechanics and Materials, Vol. 233, (2012), pp.224-227.

[6] Zeng Shugu, Su Xiaolou, Luan Chengao: China Railway Science, Vol.5, No.1, (1984), p.60–71.

[7] Hu Guoming: Analysis and simulation of granular system by discrete element method using EDEM. Wuhan: Wuhan University of Technology Press (2010).

[8] M. Lu, G.R. McDowell: Granular Matter, No. 9, (2007), pp.69-80.

[9] Jean-Francois Ferellec, Glenn R. McDowell: Granular Matter, No.12, (2010), pp.459-467.