QIANG Weile, CHENG Yan, LIN Mengmeng, JING Guoqing
Journal of Railway Engineering Society. 2025, 42(5): 38-42.
Research purposes: The ballast lateral resistance is an important factor affecting the stability of CWR, an important basic parameter for the design and calculation of CWR of ballasted track, and also has an important impact on the safety and stability of train operation. In view of the insufficient depth of sleeper bottom texture in some areas, this paper conducts lateral resistance tests on sleeper with different texture conditions, studies the influence of sleeper bottom texture on the ballast lateral resistance, and discusses whether there is a possibility to cancel the relevant regulations of sleeper bottom texture in order to improve the construction efficiency.
Research conclusions: (1) The depth of sleeper bottom texture will have a certain impact on the lateral resistance of the ballast bed. The less depth of texture is, the smaller the lateral resistance of the ballast bed. (2) The overall texture is shallow, the texture part is shallow, the texture depth is enough but there is ash and slag in the sleeper compared with the ordinary Ⅲc sleeper, the lateral resistance of the track bed is reduced by 2.95%, 1.95%, 0.98%, and the influence range is between 0 and 3%. (3)The sleeper with shallow texture at the bottom will reduce the lateral resistance of the track bed, but the influence is not large. Under the same condition, the maximum dispersion of the repeated test results is more than 3%, which is similar to the influence amplitude of the texture. It can be concluded that the texture has little influence on the lateral resistance of the ballast bed. (4) In addition to the experimental study, a ballast-track discrete element simulation model should be established to analyze the influence of the depth of sleeper bottom texture on the lateral resistance of the track bed, and more accurate data should be used to verify the above conclusions.(5) Due to the small impact of concave patterns,it can be preliminarily considered to eliminate the relevant provisions of concave patterns.