Articles published in the issue 02, 2022

Reliability of rails in various operating conditions

Keywords: service properties of rails, reliability, contact fatigue endurance, wear resistance, specific output of rails, areas of rational use of rails.

Shangin Ruslan — Deputy Director of the Design Bureau for Infrastructure — Branch of JSC «Russian Railways». Moscow, Russia. E-mail: shanginrv@gmail.ru

Annotation. The results of evaluating the operability of rails from various manufacturers in terms of reliability are presented. It is emphasized that the characteristics of GOST R 51685-2013 are not as important to the customer of rails products as the service properties of rails, such as reliability, wear resistance, contact endurance, weldability, in this connection, it is necessary to make changes to the regulatory documentation.

Interaction of profiles in the «wheel-rail» system on high-speed traffic sections

Keywords: high-speed traffic, the outline of the profile rails, interaction of track and rolling stock, the wear of the rails, wheel rental, contact pressure, vertical force.

Abdurashitov Anatoly — Ph.D., associate Professor, Head of the rails department of PKB I — branch of JSC «Russian Railways». Moscow, Russia. E-mail: abdran@yandex.ru

Yurkova Yulia — postgraduate student of the department of «Railway track and track facilities» of the Russian University of Transport (MIIT). Moscow, Russia. E-mail: y.lenin@bk.ru

Abstract. The results of calculations of the interaction forces of the track and rolling stock in high-speed traffic sections depending on the state of the rolling surface of rails and wheels are presented.

The assessment of the stability of high embankments, taking into account the dynamics of train impact

Keywords: high embankment, dynamics of train impact, ground vibration, inertial forces.

Aspiz Evgenii — D. Sci., assisstant professor, the Head of the Department «Track and track facilities», Russian University of Transport (MIIT). Moscow, Russia. Е-mail: geonika@inbox.ru. SPIN-код: 5412-7662.

Shmakov Andrei — Head of the Research Laboratory «Path Testing», Department «Track and track facilities», Russian University of Transport (MIIT). Moscow, Russia. Е-mail: shmakow.andrei@yandex.ru

Abstract. The article presents a methodology for taking into account the dynamic nature of the impact of trains on the stability of the slope parts of the operated high embankments. It is proposed to introduce additional inertial forces from ground vibrations during the passage of trains into the classical calculation of the stability of embankment slopes. A method is proposed for measuring the parameters of the soil vibrations of the embankment and finding the calculated values of vibration accelerations to take them into account when assessing stability.

The method is tested on the example of assessing the stability of an embankment located on the Sverdlovsk railway.

Railway Switch R65 mark 1/11 of the project MCЗ.8365

Keywords: Switch, railway track, track management, crosspiece, wit, fastenings.

Lepeshichev Timofey — design engineer of the second category of the Murom Switch Plant, post-graduate student of the Department «Path and track Management» of the Russian University of Transport (MIIT). Moscow, Russia. E-mail: TimLep@yandex.ru

Yershov Denis — chief designer of the Murom Switch Plant. Murom, Russia. E-mail: dershov@vspholding.ru

Abstract. According to the long-term development program of the Russian Railways holding for the period up to 2025, it is necessary to increase the resource of switches to 700 million gross tons, in connection with which the Murom Switch Plant has created a new switch that meets the necessary requirements. The article discusses the new switch МСЗ.8635, its structural features and the results of its tests on the railway.

Investigation of cracking of reinforced concrete bridges

Keywords: diagnostics; superstructures; normal cracks; inclined cracks; crack opening; structural coefficient; defects.

Sheykin Alexander — Ph.D, associate professor of the Departament «Bridges and tunnels» Russian University of Transport (MIIT). Moscow, Russia. E-mail: a.sheikin@yandex.ru

Abstract. Two cases of bridge structures cracks expansion for ordinary reinforced concrete under test load are dealing with: one which meets requirements of Code of Rules (SP) and another exceeding the theoretical values. It’s illustrated with the real case for vertical crack that a significant exceeding by experimental values of the theoretical ones may indicate hidden structural defects in a bridge span structure. Simultaneously, similar situation with inclined cracks may be related not with acquired defects, but with structural defects of the beams what makes vital upgrading the SP formula for the width of the opening of inclined cracks.

Possibility of detecting «hot crack» defect in welded joints

Keywords: aluminum thermal welding, ultrasonic inspection of rails, welded joints, defects in welded joints, microstructure of metal in welded joints.

Nikolaev Sergei — Ph.D., is an associate professor, departments are «Methods and devices of non-destructive control» of the Petersburg university of ways of report. Saint-Petersburg, Russia. E-mail: nikol_ndt@mail.ru

Abstract. In the course of research, the possibility of detecting a defect of the «hot crack» type was analyzed by ultrasonic inspection using an ultrasonic flaw detector (for local inspection) and using flaw detector with phased arrays (during acceptance inspection), as well as the possibility of detecting a defect using an ultrasonic inspection method according to a method different from the one accepted.

Results of experimental studies with application of capillary and magnetic powder methods, for confirmation and visualization of defect on fragment of welded joint of rails, with subsequent studies of macro and microstructure of fragments of welded joint in place of detected internal defect and on defective section are presented.

Automated control system for loading and unloading snow brush trains

Keywords: railway snow brush trains, automated control system.

Repyakh Alexey — lecturer, Novosibirsk subdivision, West Siberian training Center for professional qualifications of the West Siberian railway. Novosibirsk, Russia. E-mail: repyakh.alex06@yandex.ru. SPIN-code: 3964-6673.

Manakov Alexey — Professor, Rector, Siberian Transport University. Novosibirsk, Russia. E-mail: manakov005@mail.ru. SPIN-code: 7786-1871.

Punk Rimma Vyacheslavovna — lecturer, associate professor, Siberian State Transport University. Novosibirsk, Russia. E-mail: rimmapank@mail.ru. SPIN-code: 2644-7175.

Abstract. The article poses the operational problem of snow removal equipment, considers the automated systems installed on them. An automated control system for a snow brush train in loading and unloading modes is proposed.

The influence of methods of earthworks on the atmosphere of the environment

Keywords: hydro-mechanized technology, dump-excavator technology, atmospheric air pollution.

Ivanova Nina — Ph.D., associate Professor of the Ural State University of Railway Transport. Yekaterinburg, Russia. E-mail: Ninaivanova-1948@yandex.ru

Pilipenko Alyona — magister of the Ural State University of Railway Transport. Yekaterinburg, Russia. E-mail: alenka pilip@mail.ru

Igoshev Ivan — student of the Ural State University of Railways. Yekaterinburg, Russia. E-mail: Ighoshiev2000@mail.ru

Abstract. To study the influence of technology for the development of an earth canvas during the construction of transport highways to the atmosphere of the environment. The article discusses two ways of building an earthen canvase: the dump truck-excavator and hydromechanized. Revealed advantages and disadvantages of each method. The complex of the necessary technological equipment was established and calculations were made to determine the contamination with harmful impurities, the result of which it turned out that the hydromechanized method is less harmful.

Effects of vibrations from railway lines on artificial structures

Keywords: root-mean-square value of vibration velocity, root-mean-square value of vibration acceleration, vibration effect.

Pestryakova Ekaterina — Ph.D, Associate Professor of the Department «Вridges and tunnels» Russian University of Transport (MIIT). Moscow, Russia. E-mail: katrin.pestrik@gmail.com. РИНЦ SPIN-код: 6339-2821 РИНЦ Author ID: 898914

Eseva Elena — postgraduate student of the Department «Вridges and tunnels», Russian University of Transport (MIIT). Moscow, Russia. E-mail: esevaEA@rambler.ru. РИНЦ SPIN-код: 8946-6543 РИНЦ Author ID: 945738

Goncharuk Alexandr — postgraduate student of the Department «Вridges and tunnels», Russian University of Transport (MIIT). Moscow, Russia. E-mail: gon4aruksasha@yandex.ru. РИНЦ SPIN-код: 6888-6781

Kos Oksana — assistant of the Department: «Applied software and mathematical methods» Moscow Aviation Institute (National Research University). Moscow, Russia. E-mail: kosoksana90@gmail.com. РИНЦ SPIN-код: 5170-3781 РИНЦ Author ID: 750672

Belenyuk Irina — 3rd year student, Department of Architecture of the State University of Land Management. Moscow, Russia. E-mail: irinabelenyuk@gmail.com. РИНЦ SPIN-код: 3484-5914

Abstraсt. Vibration from high speeds on railways negatively affects artificial structures and as a result they pose a threat to human life. As a result of an experimental examination of the foundation of an artificial structure, it was revealed that vibration had a serious impact on the condition of the artificial structure, affected wear resistance and shortened its service life. Exceeding the normative levels of vibration rates indicates the need for technical solutions to reduce the level of vibration, as well as technical solutions to strengthen this foundation. Assessment of the physical factor (vibration impact) is an integral part of complex engineering and environmental surveys, which are carried out to assess the condition of artificial structures, predict possible changes in the parameters of artificial structures under the influence of anthropogenic impact, environmental studies.

Assessment of the stability of thawing slopes based on triaxial compression tests of soils

Keywords: triaxial tests, thawing soils, slope stability, near-contact layer.

Tsarapov Mikhail — Ph.D., Senior Researcher of the Department of Geocryology of the Geological Faculty of the Lomonosov Moscow State University, General Director of the Research and Production Enterprise of the Lomonosov Moscow State University. Moscow, Russia. E-mail: tsarapov@geol.msu.ru

Abstract. A method is proposed for assessing the stability of a thawing slope based on soil tests under a complex stress state on the basis of determining the strength parameters by the triaxial compression method.