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Preliminary study of shaping the railway track geometry in terms of their maintenance costs and capacity

Gołębiowski Piotr, Kukulski Jacek

Archives of Transport

2020

Vol. 53, iss. 1

115--128

In Poland, due to the increase in investments made by railways in recent years, and thus the increase in the replacement value of transport infrastructure, the need for expenditure on infrastructure maintenance will increase in the next 30 years, or the development of the developed transport network will degrade. As part of the overall discipline of resource management, subdiscipline has emerged - infrastructure asset management. As part of the management of railway transport infrastructure, the demand for cheaper maintenance costs will grow. The cost reduction of infrastructure maintenance is possible through meticulous assessment of its condition, rational selection of locations and scope of repairs at the assumed risk level, as well as at the stage of preparation of new construction or modernization projects taking into account aspects of later maintenance. For some time, we have been observing the accumulation of knowledge (methods, programs, procedures) in the country and abroad enabling optimization of infrastructure condition assessment and programming of its maintenance. The implementation of these solutions may result in a more rational use of funds for infrastructure maintenance and not disturb its smooth functioning in operation. The article discusses aspects that should be considered in the design process of railway infrastructure. Particular attention was paid to the durability of steel components of the railway superstructure, maintenance costs as well as aspects related to the capacity of the track node. An example of dependence of selected values of radial arcs depending on their durability and maintenance costs was presented. It was proposed to change the track layout at the Warszawa Srodmiescie passenger stop planned for reconstruction. Calculations of kinematic parameters for various configurations of railway turnouts were performed. Also, calculations of the capacity for the existing track system solution as well as the proposed track system after reconstruction of the analysed Warszawa Srodmiescie railway station were also carried out.

Ocena kosztu cyklu życia szyn kolejowych w modernizacji układów geometrycznych

Szwaczkiewicz K., Szmagliński J.

Przegląd Komunikacyjny

2015

Nr 9

166--168

W pracy przedstawiono uwarunkowania historyczne, które doprowadziły do opracowania metod szacowania kosztu życia inwestycji. Opisano podstawowe założenia LCC według modelu przedstawionego w Normach oraz opracowanego w projekcie INNOTRACK. Zaproponowano połączenie powyższych metod i dostosowanie ich do oceny kosztu życia szyn kolejowych w Polce. Przedstawiono elementy wpływające na koszt utrzymania nawierzchni szynowej oraz metody zwiększania trwałości szyn. Na podstawie opracowanego algorytmu wykonano obliczenia dla przykładowego łuku poziomego i określono zakres opłacalności stosowania szyn utwardzanych cieplnie.

The paper presents the historical background that led to develop the methods of investment life cycle costing. The basic assumptions of LCC taking into account Guidelines and INNOTRACK project were described. Mentioned methods were adapted to life cycle costing of rails in Polish conditions. The parameters affecting the cost of railway maintenance and the methods improving durability of the rails were presented. The calculations were performed for the exemplary horizontal curve based on the developed algorithms. The scope of profitability of using hardened steel rails was also defined.