R.E.W.I. - R.O.S.E. - Frame type sleepers - new type of track switches - Optimisation of noise and vibration characteristics
Overview
Background & policy context:
The rail system, especially freight rail transport is competing against modes having much lower noise and vibration emissions of the wheels. Also rehabilitation work often completely blocks tracks because of the absence of redundancies (tracks with low usage in parallel). Increasing axle weights and velocities create problems for single sleeper gravel based tracks. This results in frequent rehabilitation work which naturally blocks the train operation. With solid trackways there is a solution available which however has other disadvantages. The new system combines low pressures for the soil with low noise absorption and high stability.
Objectives:
The project aims at:
- reducing noise and vibration emissions
- reducing rehabilitation work by 70-80%
- reducing the cancellation time for tracks
- reducing the pressure impact on the soil
- improving the stability of the tracks
The main problems to be solved were the joining of two tracks and the reduction of the types of frame sleepers necessary to build a switchyard system. The new system shall also allow an employment of the existing maintenance and reconstruction machineries.
Methodology:
The project is devided into several phases. In the first phase the measurements will be undertaken to document the status quo. In the following phase, the stiffness parameters of the sleeper-gravel system will be optimised. The third step is a laboratory test. Here the new frame sleepers will undergo experimental testing. Last but not least the prototypes of the new frame sleepers shall be tested under normal operation accompanied with measurements of noise emission but mainly the stability - eventual changes in geometry.
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