Graph-analytical solution for optimizing the organization of straightening works to bring the curves up to the project parameters

Abstract

Urgent for the Belarusian railways is the task of increasing traffic speeds. A safety precondition here is the operation of curved sections, whose state ensures that the permissible value of the undampened acceleration for the maximum allowed speed of a passenger train (ANP) and the rate of change of the undampened acceleration are not exceeded. In April 2020  diagnostic infrastructure complex of DKI was put into operation, which allows to expand the number of determined parameters, and evaluate the infrastructure, not as separate elements, but comprehensively, that is, to assess the geometry of the track in conjunction with the parameters of the subgrade, ballast section, a width between the tracks, the presence of oversized places, etc. System analysis and monitoring of the data obtained by DKI allows you to reflect the state of technical objects using the automated system for complex diagnostics of infrastructure objects “Expert”. At the moment, a large number of curved sections was revealed whose position does not correspond to the design documentation, as well as violations of the main parameters of the curves, such as: deviation of the external rail elevation (49,5 %), irregularities in the plan (35,2%), mismatch of elevation and curvature bends (17,2 %) and other deviations. It is shown that the lack of work organization to eliminate the shift-curved sections of railway track cosists in the operation of liner-tamping-straightening machines type VPR by the method of smoothing, without prior analysis of related factors. Based on the results of studying the characteristics of the existing curve in the Minsk – Molodechno direction, an algorithmic solution is proposed to optimize the organization of straightening works to bring the curves up to the project documentation reqirements.