INVESTIGATION OF THE TRAFFIC SAFETY AND PROVISION OF THE PERFORMANCE RELIABILITY OF THE TRANSPORT INFRASTRUCTURE

Ruslan Markul, Vitalii Kovalchuk

Abstract


In the track facilities over the past decade, the polygon for laying reinforced concrete crossties has significantly expanded for many reasons. The main ones are the shortage of wooden crossties, their high cost and low life. Due to frequent crossovers, the service life of wooden crossties in the curved sections of the track R≤350 m is only 7 years. This is 5 times less than the life of reinforced concrete crossties. In the curves R≤350 m under the action of the rolling stock, an intensive accumulation of residual deformations occurs, which causes a violation of the track geometry in the plan. Simultaneously, the stability of the assembled rails and crossties in the transverse plane decreases.

Given the shortcomings of the railway track on wooden crossties, a study is conducted to solve the problems of geometry, and the stability of the track in the transverse horizontal plane. To achieve this, the design of the fastener assembly KПП–5 (SB–3) has been improved, which makes it reliable and adjustable in all respects for 800 1000 million of tons of bruto. In order to ensure the stability of the track, an anchor crosstie structure has been created which can increase the resistance to transverse displacement of the assembled rails and crossties more than 2 times. The developed and justified measures will allow to create a highly efficient construction of a seamless track with reinforced concrete crossties and КПП–5 (SB–3) fastener for curved sections with a radius of 350 ÷ 200 m.

When considering these proposals with the possibility of practical use, it becomes possible to introduce a safe and reliable design of continuous welded rail track with КПП–5 fastener assembly in difficult operating conditions

Keywords


infrastructure; traffic safety; railway track; stability; anchor crossties; intermediate rail fastenings; clamping force

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References


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DOI: http://dx.doi.org/10.21303/2585-6847.2017.00483

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ISSN 2585-6847 (Online), ISSN 2585-6839 (Print)