The application of under-sleeper pads should be determined based on track type, operational needs, and environmental conditions. The following scenarios particularly require their use:
1. Special Sections in New Railway Construction
Under-sleeper pads are essential in areas with weak foundations, such as soft soil subgrades or karst regions. By distributing loads, they reduce uneven settlement and enhance track stability. In such sections, the installation rate typically reaches 100%.
2. Maintenance of Existing Tracks
When track elevation deviations exceed 5mm, under-sleeper pads offer an efficient solution. Compared to traditional methods like excavating the track bed, this approach reduces workload by over 80% and minimizes operational disruptions, making it ideal for quick repairs on mixed passenger-freight lines.
3. Vibration- and Noise-Sensitive Areas
In zones within 30 meters of residential areas or schools, high-damping under-sleeper pads can reduce environmental noise by 10-15 decibels, complying with Railway Boundary Noise Limits and Measurement Methods. Such areas now mandate their use.
4. Critical Sections in Heavy-Haul and High-Speed Railways
For heavy-haul railways (axle loads >25 tons), pads mitigate rail-sleeper damage from wheel-rail impacts.
In high-speed railways (>300 km/h), they optimize elasticity to improve ride comfort and reduce component fatigue.
GNEE RAIL is a professional trading company focusing on the export of railway fasteners, committed to providing reliable rail connection products for global railway construction projects. The main products include a full range of railway fasteners such as various spring clip fastener systems, sleeper bolts, anti-loosening washers and insulating components, which are suitable for various application scenarios such as conventional railways, heavy-duty railways and urban rail transit.