Abstract
The lateral resistance of sleeper plays an important role in ensuring the stability of a railway track, which may change in the operation of railway, due to the fouling in the ballast bed. In this work, discrete element method was adopted to investigate the effect of fouling on the lateral resistance of sleeper. The shape information of ballast was captured by method of three-dimensional vision reconstruction. In order to calibrate the mechanical parameters and verify the models, a lateral resistance field test was carried out by using a custom-made device. The contact force distributions in the different parts of sleeper as well as the interaction between ballast and sleeper were discussed in depth. The results show that fouling of ballast bed evidently reduces the lateral resistance of sleeper and the decreasing degree is also related to the fouled position of ballast bed, in the order of shoulder > bottom > side. Therefore, the effect of fouling, especially the fouling in the ballast shoulder, on the lateral resistance of sleeper, should be taken into account in ballast track maintenance work.
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Foundation item: Projects(U1234211, 61472029, 51208034) supported by the National Natural Science Foundation of China
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Xu, Y., Gao, L., Zhang, Yr. et al. Discrete element method analysis of lateral resistance of fouled ballast bed. J. Cent. South Univ. 23, 2373–2381 (2016). https://doi.org/10.1007/s11771-016-3296-5
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DOI: https://doi.org/10.1007/s11771-016-3296-5