Assessing the suitability of reusing reinforced concrete sleepers Sh1

Abstract

   The article presents an assessment of the residual life of reinforced concrete sleepers that have served their first term of service; sections from particularly busy routes of the West Siberian Railway for the period 2014–2023 with a tonnage of more than 1,000 million tons at the time of major repairs were selected.
   The assessing the suitability of reinforced concrete sleepers dismantled from sections of the Trans-Siberian (43 sections: track I – 31 pcs.; track II – 12 pcs.) and Central Siberian Railways (32 sections: track I – 28 pcs.; track II – 4 pcs.) ZSDI for reuse was made. For these sections, the overhaul statements of the old track grid with reinforced concrete sleepers Sh1 for intermediate rail fastenings of the KB65 type, carried out on the basis of a number of track machine stations of the ZSDRP, were considered.
   Dependences of the change in the serviceability share of reinforced concrete sleepers Sh1 with a domestic reinforcement scheme (44 × 3 mm) on the duration of their first service life (1 000–1 600 million tons) in especially heavy-duty conditions have been obtained.
   The average serviceability share of reinforced concrete sleepers along the Trans-Siberian Railway was determined; the average serviceability percentage of reinforced concrete sleepers was 67.4 % for track I and 59.5 % for track II, with an average tonnage of about 1 250 million tons; on the Central Siberian Railway – for track I – 59.3 % and for track II – 79 % with an average tonnage production of about 1 280 million tons.
   The average intensity of the reduction in the serviceability of reinforced concrete sleepers was calculated: on the Trans-Siberian Railway for track I – 4–7 % / 100 million tons, in the range of 1 100–1 400 million tons, on the Central Siberian Railway for track I – 4–5 % / 100 million tons, in the range of 1 300–1 600 million tons.