Metodika a posuzování spolehlivosti v srdcovkové části výhybek

Abstract

This work deals with problems of dynamically stressed heart parts of switches, which arise from a different passage of the railway wheel through the heart of the switch. The work describes problems of emerging defects, dynamic stresses, measurement of defects, described current ways of repair and avoidance of deterioration of driving characteristics in the heart part of the switch. Another part and goal of this work is to introduce the method of stabilizing the rail ballast in the frog section of the switch by a material based on two-component resin (glue), which locks the rail ballast at the point of the cross section and helps the sleepers to transfer dynamic forces from the passage of the railway vehicles. An integral part of the work is the introduction of two test sections for the stabilization of the rail ballast in the place of the frog parts of the switches and the technology already used in another construction. Significant attention was focused to the measurement of the test sections, the condition of the frogs, and the total condition of the switches during the threeyear measuring of one of the test sections. A new laser scanner Calipri C40 was used for rails and frogs section for measuring profile. At the end of the work, test sections are presented and the technology itself is evaluated with the existing methods and technologies and the comparison of the lifetime of the triedand- tested rail ballast for stabilization technology with the most common method of repairing local defects by machine tamping. In the end, the technology is evaluated and recommended to develop an instruction for the possibility of introduction into common practice or further academic research for other types of use in railroad structures.