2026, Vol. 13, No. 1. - go to content...

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DOI: 10.15862/07SATS126 (https://doi.org/10.15862/07SATS126)

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Ulanov I.S., Gorlov A.V., Lutsky S.Ya., Cherkasov A.M., Epifantsev D.V. Structural and technological solutions for variable stiffness sections in the design of high-speed railway lines. Russian Journal of Transport Engineering. 2026; 13(1). Available at: https://t-s.today/PDF/07SATS126.pdf (in Russian). DOI: 10.15862/07SATS126

Structural and technological solutions for variable stiffness sections in the design of high-speed railway lines

Ulanov Ivan Sergeevich
NPS High-Speed Technologies LLC, Moscow, Russia
E-mail: i.ulanov@npsst.ru
RSCI: https://elibrary.ru/author_profile.asp?id=949102

Gorlov Aleksandr Vyacheslavovich
NPS High-Speed Technologies LLC, Moscow, Russia
E-mail: a.gorlov@npsst.ru
RSCI: https://elibrary.ru/author_profile.asp?id=875880

Lutsky Svyatoslav Yakovlevich
Russian University of Transport (MIIT), Moscow, Russia
Institute of Track, Construction and Structures
E-mail: lsy40@mail.ru
RSCI: https://elibrary.ru/author_profile.asp?id=846369

Cherkasov Aleksandr Mikhailovich
Russian University of Transport (MIIT), Moscow, Russia
E-mail: a.m.cherkasov@edu.rut-miit.ru
ORCID: https://orcid.org/0000-0002-8233-9803
RSCI: https://elibrary.ru/author_profile.asp?id=472233
SCOPUS: https://www.scopus.com/authid/detail.url?authorId=57200192573

Epifantsev Denis Vadimovich
Russian University of Transport (MIIT), Moscow, Russia
Institute of Track, Construction and Structures
E-mail: epifantsev.d.2000@gmail.com
RSCI: https://elibrary.ru/author_profile.asp?id=1239138

Abstract. The article addresses the problem of ensuring the reliability and safety of train traffic on sections with different types of track superstructure, primarily at the interface between ballasted and ballastless track. A comprehensive approach to selecting design and technological solutions for designing the parameters of a variable stiffness track section across all working zones is proposed — rails, fastenings, sub-rail support (sleepers), roadbed, and subgrade.

The main elements of transition zone structures are considered: transition reinforced concrete slabs, elongated sleepers, additional guard rails, under-sleeper and under-rail pads, sub-ballast mats, adjustable rail fastenings, geosynthetics, stabilizing binders, drainage, and frost-protection layers. For the active zone of the roadbed and embankment foundation, the necessity of diagnosing and forecasting the impact of vibration-dynamic loads on the heterogeneous soil structure is demonstrated. Design and technological solutions can influence several target characteristics simultaneously; the degree of their influence is established for practical selection under given operational conditions. International and domestic experience regarding track deformations on such sections and the engineering measures ensuring their compensation is summarized. The organization of stationary monitoring posts and a program for monitoring the condition of the track structure and its foundation are proposed, aimed at diagnosing and regulating the reliability of all working zones throughout the lifecycle stages.

The practical value of the work lies in refining the criteria and forming a systematic approach to designing variable stiffness track sections, which allows for increasing operational reliability and reducing maintenance costs during the construction and operation of high-speed railway lines.

Keywords: high-speed railway; railway track; variable stiffness; loads; deformations; design and technological solutions; monitoring; reliability

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