Pre-stressed concrete railway sleepers type B70W-60: requirements, technology of production, numerical modelling and calculations of immediate technological shortening
Pre-stressed concrete railway sleepers type B70W-60: requirements, technology of production, numerical modelling and calculations of immediate technological shortening
Pre-stressed concrete railway sleepers type B70W-60: requirements, technology of production, numerical modelling and calculations of immediate technological shortening
Autor
Betlej, Michał
Ciurej, Henryk
Chudyba, Łukasz
Opublikowane w
Archives of Civil Engineering
Numeracja
vol. 72, iss. 2
Strony
35-45
Data wydania
2026
Miejsce wydania
Warsaw
Wydawca
Warsaw University of Technology. Faculty of Civil Engineering
Polish Academy of Sciences. Committee for Civil and Water Engineering
A railway sleeper is one of the basic elements of track that directly impacts traffic safety. Railway sleepers are laid on the ballast and their purpose is to take the loads from the rails loaded with the rolling stock and to ensure the required width of the track and provide resistance to potential the vertical and horizontal shifts of the railway track system. Therefore is essential a high quality requirements for the sleepers. This thesis shortly demonstrate requirements for pre-stressed concrete railway sleeper and present production technology and the method of prestressing of sleeper B70W-60. Goal of this paper covers the numerical modelling of the sleeper and determination of immediate strain and shortening directly after prestress activation. Longitudinal shortening the sleeper immediately after releasing tension bolts, manifest itself in separating concrete from mould walls. Measuring the width of this separation is a useful indicator value – if it is too high, it may mean that there are technological process errors or an internal defect of an individual sleeper. Therefore, the numerical estimation of the separation width is a part of design process.
