A comprehensive solution for setting the railway track plan in the design position
Due to the rapid growth of the train traffic speed there is a need in new approach to the repair and maintenance of a railway track both in plan and profile view making the subject topical. The paper considers the issues of the railway track plan survey. The accuracy of coodinate and boom surveying methods is analyzed. Following the analyses the modeling is performed in the "Universal mechanism" software package. The model is based on the existing section of the Irkutsk-Sortirovochnaya distance of East Siberian railroad situated at 5186 - 5189 km. The main purpose of the modeling was to consider the influence of the track plan unevenness on the creep shear forces. Herein the plan unevenness is given in the error value of the considered shooting methods. During the modeling it was found out how the track plan unevenness affects the shear forces, and demonstrated that while designing, maintaining and repairing the railway track it is necessary to use comprehensive or combined methods of straightening. The combined survey implies the synergy of the two methods. The first method is needed for the spatial positioning of the track while the second one - to achieve its maximum smoothness. Thus the combination of coordinate and boom methods can produce a positive result in increasing the quality of railway track maintenance in plan. In the article the recommendations are given for comprehensive solution of setting the track into the designed position. For this, it is appropriate to develop and apply both modern methods using reference stations and the long-standing ones based on measuring the track’s curvature.