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Adjustment of the existing structures located on the trunk railway line CMK to accommodate high-speed rail (HSR) based on theoretical and experimental analyses

Karaś S., Krasnowski A.

Roads and Bridges - Drogi i Mosty

2013

Vol. 12, no. 4

385--410

W pracy zawarto analizę możliwości dostosowania istniejących obiektów na odcinku linii kolejowej Grodzisk Mazowiecki - Zawiercie do warunków obciążenia pociągami dużej prędkości. Na podstawie analiz numerycznych i badań doświadczalnych, w tym próbnych obciążeń, przeprowadzono oceny stanu technicznego istniejących 68 przepustów i 31 mostów pod kątem możliwości ich wykorzystania przy prędkości pociągów 250-350 km/h. Praca zawiera wnioski o zasadności przebudowy ustrojów swobodnie podpartych na zintegrowane ramowo - gruntowe , które charakteryzuje zwiększona sztywność statyczna i dynamiczna. W artykule zamieszczono krótki przegląd podstawowych prac z zakresu problematyki szybkich kolei.

The existing structures located on the railway line Grodzisk Mazowiecki - Zawiercie are analysed from the point of view of the required adjustments to accommodate high-speed rail (HSR) in the paper. The total number of sixty eight (68) culverts and thirty one (31) bridges were evaluated for their suitability, upon the required adjustment, to 250-350 km/h line speed by way of numerical analyses and experimental tests including load tests and condition surveys. The authors give recommendations for altering the static system from simply supported for fully integral construction. Moreover, an overview of publications on high-speed rail is presented.

High speed rail - the current challenge to Polish rail transport

Karaś S., Krasnowski A.

Journal of KONES

2012

Vol. 19, No. 3

203-212

The increase of the role of rail transport in comparison with road and air ones was an important task for transport engineering in western Europe and Japan in the 1970s. Now the problem is not completely closed but the majority of the establishments formed in the beginning were successively solved. The main assumptions could be grouped into environmental protection and sustainability, decreasing the travel time connected with accessibility, safety, comfort for passengers, considering freight transport, as well. The high speed of the moving train was the main criteria of any engineer approach i.e. from the point of view of energy safety, limiting pollution, ability to transport thousands of people and tons of cargo. High Speed Rail - (HSR) means the speed between 250 to 400 km/h. This divides tracks into two groups: ordinary tracks and special ones, which results in two possible ways: adopting existing tracks or building new railways. Recently the program of HSR has been decided to put in motion in Poland. The situation here was very complicated. Many abandons such as complete lack of road highways, backwardness in air transport as well as rail transport, which means abandons in track conditions and rolling stock. At least, actually no existing haulage transport. In those circumstances, any rational first step was to be taken i.e. a technical diagnosis and an estimation of the existing railway system including culverts and bridges as important elements of trucks. The paper presented here contains a short survey of statical and dynamical field test results and FEM analyses as an extension to the train speeds 1.2ź350 = 420 km/h.