Characteristics and requirements of urban rail transit rail systems
- What are the main differences between the track systems of urban rail transit and railway track systems?
Urban rail transit mostly uses underground or elevated lines, and the space is limited. Therefore, the track system structure is more compact. Special structures such as elastic short - sleepers and floating slab track beds are used to achieve better vibration and noise reduction effects. Urban rail transit has a high operation density and short departure intervals, and has higher requirements for the reliability and stability of the track system. In addition, the elastic pad stiffness of the fastener system of urban rail transit is lower (10 - 30kN/mm) to absorb the vibrations generated by frequent train starts and stops.
- What are the special requirements of urban rail transit for track components?
Urban rail transit requires track components to have good anti - corrosion performance to adapt to underground wet or elevated open - air environments. Stainless steel materials or anti - corrosion coating treatments are often used. It has strict requirements for the vibration and noise reduction performance of the track. Special vibration - reducing pads, rubber crossing plates and other components are required to control the train operation noise within the specified range. At the same time, due to the limited maintenance time, track components are required to be easy to install and disassemble to improve maintenance efficiency.
- What are the innovative technologies of the new urban rail transit track system?
Innovative technologies include the steel spring floating slab track bed technology. The track bed is supported by steel springs, and the vibration isolation efficiency is over 90%, which is often used in areas sensitive to vibration such as residential areas and hospitals. The magnetorheological elastomer pad technology uses the characteristics of magnetorheological materials to automatically adjust the pad stiffness according to the train load, optimizing the wheel - rail force transmission. There is also the modular design technology of track components, which makes the installation and replacement of track components more convenient and shortens the maintenance time.
- What is the market development prospect of the urban rail transit track system?
With the acceleration of urbanization, urban rail transit construction has entered a period of rapid development. It is expected that by 2030, the operating mileage of urban rail transit in China will exceed 15,000 kilometers, driving the market size of the track system to exceed 100 billion yuan. At the same time, the "dual - carbon" goal promotes the growth of demand for green and environmentally friendly track systems, and enterprises with technical and cost advantages will have greater development opportunities.
- What are the maintenance key points of the urban rail transit track system?
The maintenance of the urban rail transit track system needs to be carried out during the night "skylight period", so a detailed maintenance plan should be formulated in advance. Focus on checking the geometric dimensions of the track, such as rail gauge, level, height, etc., to ensure compliance with the standards. Check the fastening status of the fasteners to prevent the fasteners from loosening. Regularly detect and replace vibration and noise reduction components to ensure their effective performance. In addition, it is also necessary to strengthen the monitoring of the track foundation, and promptly discover and deal with problems such as foundation settlement.