Stability Analysis and Evaluation of Jointless Track Based on Ballast Surface Parameters
- 1 School of Transportation, Shijiazhuang Tiedao University, Shijiazhuang, China
- 2 School of Transportation, Shijiazhuang Tiedao University, Shijiazhuang, China
- 3 School of Transportation, Shijiazhuang Tiedao University, Shijiazhuang, China
- 4 Beijing Jiaotong University Integrated Transport Research Center, Beijing, China
Abstract
In formulas that use the probabilistic method to calculate the stability of the CWR, the value of the cross-resistance of the track beds hasn’t fully taken into account the influence of the type of the parameter combination of the track bed, making the calculation results for a particular line undifferentiated. The analogy of the trajectory of the lateral displacement of the trackless bed is proposed. It is proposed that the lateral resistance of the track bed is also ambiguous within the allowable lateral displacement limit, and equivalent randomization is performed. Through the analysis of the characteristics of the appearance parameters of the track bed, a calculation formula containing multiple surface parameters for the lateral resistance of the track bed was established, and the values of various factors were reasonably analyzed. The purpose of this paper is to point out that in the stability evaluation formula, the value of the lateral parameters of the ballast bed lacks the consideration of the surface parameters. Based on the surface parameters, a model to evaluate the lateral resistance of the track bed is proposed. It can be seen as a refinement of the formula.
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