Results of tests of ballastless track designs on the Test Loop of JSC “VNIIZhT”

In December 2016 at the Test Loop of JSC “VNI-IZhT” comparative testing of four types of ballastless track designs (BVSP) - LVT (RZDstroy, Russia), FFB (MaxBögl, Germany), NBT (Alstom, France), EBS (Tines, Poland) - have been completed. The passed tonnage for the pilot section of the four structures was 600 million tonnes gross. The article analyzes the intensity of settlement of the ballastless track and in transitional sections under the train load. Conducted tests of four types of ballastless track designs LVT (RZhDstroy, Russia), FFB (MaxBögl, Germany), NBT (Alstom, France), EBS (Tines, Poland) and earlier tests of the Rheda (RailOne, Germany) design showed that for the ballastless track on the subgrade, the most critical are not the stresses in the structural elements, but the values of the vertical settlements. In the places of maximum values of the settlement of the upper bearing concrete (reinforced concrete) slab, the underlying layer of the hydraulically linked bearing layer of lean concrete is subsequently destroyed. Tests on the Test Loop of the train with an axial load of 23.5 tons showed that the BVSP design can be used for freight traffic. It is impractical to arrange ballastless track on one of the track of a two-track section. It is necessary to exclude the ingress of water between the bearing concrete slab and the hydraulically linked bearing layer (HLBL). The significant risks are that the ballastless track is more demanding for maintain the construction technology, the composition of the concrete mixes and the quality of the substrate preparation, as evidenced by splashes from the concrete bearing slabs. The probability of a malfunction on the ballastless track is much smaller, but the risk of a sharp increase in the costs of its elimination is much higher. Tests made it possible to confirm the working capacity of the ballastless railway track for the conditions of the Russian railways, to reveal the features of the current maintenance of each design and to give recommendations on its improvement. The tests carried out at JSC “VNIIZhT” test site showed that the ballastless track can be used not only for express and high-speed traffic, but also for combined and freight traffic.

ballastless track, depression, settlement, tests, transition sections, track maintenance

1. Darr E., Fiebig W. Feste Fahrbahn. Konstruktion und Bauarten für Eisenbahn und Straßenbahn. Hamburg, Eurailpress, 2006, 272 р. (in Ger.).

2. Nigel O., Franz Q. Innovative Track Systems Criteria for their Selection. Project funded by the European Community, Directorate General Energy and Transport Under the ‘Competitive and Sustainable Growth’ Programme. ProMain. Cologne, TÜV Intertraffic, 2001, pp. 50 – 58.

3. Lichtberger B. Track compendium. First edition. Hamburg, Eurailpress, 2005, pp. 19 – 22.

4. Bezin Y., Farrington D., Penny C., Temple B., Iwnicki S. The dynamic response of slab track constructions and their benefit with respect to conventional ballasted track. Manchester, Taylor & Francis, 2010, 56 р.

5. Michas G. Slab Track Systems for High-Speed Railways // Division of Highway and Railway Engineering, Department of Transport Science School of Architecture and the Built Environment, Royal Institute of Technology. Stockholm, 2012, 107 р. URL: https://pdfs.semanticscholar.org/69f8/d0e5d9c8572bad83cfdfae1eb2f00262b20d.pdf.

6. Schilder R., Diederich D. Installation Quality of Slab Track – A Decisive Factor for Maintenance. RTR Special, Austria, 2007, pp. 20 – 25.

7. Ermakov V. M., Zagitov E. D. Opytnyy poligon na linii Sankt-Peterburg – Moskva [Testing ground on the line St. Petersburg – Moscow]. Put’ i putevoe khozyaystvo [Railway Track and Facilities], 2011, no. 2, pp. 2 – 5.

8. Savin A. V. Eksperimental'noe kol'tso: ukladka novykh konstruktsiy puti [Test Loop: laying of new constructions of the track]. Put’ i putevoe khozyaystvo [Railway Track and Facilities], 2015, no. 2, pp. 12 – 15.

9. Savin A. V., Dydyshko P. I. Bezballastnyy put' i ego osnovanie [Ballastless track and its foundation]. Zheleznodorozhnyy transport, 2015, no.12, pp. 39 – 41.

10. Petrov A. V., Savin A. V., Lebedev A. V. Rel'sovye skrepleniya, primenyaemye v bezballastnykh konstruktsiyakh puti na Eksperimental'nom kol'tse OAO “VNIIZhT” [Rail fasteners used in ballastless track designs on the Test Loop of JSC “VNIIZhT”]. Put’ i putevoe khozyaystvo [Railway Track and Facilities], 2015, no. 12, pp. 2 – 5.

11. Savin A. V., Petrov A. V., Tret’yakov K. I. Ispytaniya bezballastnykh konstruktsiy puti [Testing of ballastless track designs]. Tekhnika zheleznykh dorog [Railway engineering], 2016, no. 2 (34), pp. 28 – 38.

12. Savin A. V. Uchastki peremennoy zhestkosti dlya bezballastnogo puti [Variable stiffness areas for the ballastless track]. Put’ i putevoe khozyaystvo [Railway Track and Facilities], 2014, no. 8, pp. 2 – 6.

13. Savin A. V. Vybor konstruktsii puti dlya vysokoskorostnogo dvizheniya [Choosing track design for high-speed traffic]. Vestnik VNIIZhT [Vestnik of the Railway Research Institute], 2014, no. 1, pp. 55 – 59.

14. Savin A. V. Test results of the ballastless track. Engineerings of the railways, 2017, no. 1, pp. 26 – 31.

15. Savin A. V., Brzhezovskiy A. M., Tret'yakov V. V., Smelyanskiy I. V., Tolmachev S. V. Issledovaniya bezballastnoy konstruktsii verhnego stroeniya puti [Studies of a ballastless track superstructure]. Vestnik VNIIZhT [Vestnik of the Railway Research Institute], 2015, no. 6, pp. 23 – 32.

16. Kogan A. Ya., Savin A. V. Metodika opredeleniya raschetnogo sroka sluzhby bezballastnogo puti [Method for determining estimated service life of the ballastless track]. Vestnik VNIIZhT [Vestnik of the Railway Research Institute], 2017, Vol. 76, no. 1, pp. 3 – 9. DOI: http://dx.doi.org/10.21780/2223-9731-2017-76-1-3-9.

17. Savin A. V., Razuvaev A. D. Scopes of application of the ballastless track. Engineerings of the railways, 2016, no. 3, pp. 32 – 41.