Why Need Under Sleeper Pads For Railroad Track?
Rail pads, originally called "sole" plates or pads, are used when rail is attached to concrete, rather than timber, ties or sleepers. Their function is to reduce fatigue cracking of the concrete ties, which is believed to be driven by impact and vibration from the passing train.
| Raw Material | Rubber, EVA, TPEE, HDPE |
| Standard | UIC, AREMA, TB/T2626-95 |
| Application | 43kg/m, 50kg/m, 60kg/m, 75kg/m,115RE, UIC54, UIC60, S49 |
| Model number | 43-7-7, 43-10-7, 50-7-9, 50-10-9, 60-10-17, 60-12-17 |
| Operating temperature | -50~70 degrees |
| Certificate | MSDS, ROHS, REACH |
| Notes | They should be stored in a clean, ventilated place. Don't be in direct sunlight, and keep away from the heat source and chemical reagent. Don't touch the oil, organic solvent, and other chemicals. Banned exposure. |
Railroad under sleeper pads (USPs) are needed to act as shock absorbers, adding elasticity to the track, which reduces wear on the ballast and sleepers, improves load distribution from trains, increases track stability, and significantly cuts down on vibration and noise, making them crucial for high-speed lines, bridges, and tunnels to lower maintenance costs and extend track life.
Key Benefits of Under Sleeper Pads:
- Vibration & Noise Reduction: They absorb dynamic forces from passing trains, acting as a cushion to reduce structure-borne and airborne noise, essential in urban areas or near sensitive environments.
- Ballast Protection: By spreading the load, USPs prevent the ballast from crushing and degrading, which extends its life and reduces the need for tamping (maintenance).
- Improved Stability: They create a more stable track foundation by reducing sleeper movement and preventing the formation of hollows under sleepers, maintaining track geometry.
- Reduced Wear: Lower dynamic forces mean less wear and tear on the rails, fasteners, and sleepers, leading to longer service life and lower maintenance costs.
- Enhanced Performance: They provide defined elasticity, which is vital for high-speed lines and areas with heavy axle loads, ensuring smoother, safer, and more efficient operation.
- Ideal for Specific Locations: Especially beneficial in tunnels, on bridges, and near structures where ballast depth is limited, providing the needed elasticity that the ballast alone cannot.
The under sleeper pads are mainly used in special vibration-damping areas, such as tunnels, bridges and culverts, etc. The lower part of these sections is a rigid foundation, and the stacking height of the ballast is insufficient, resulting in insufficient track elasticity. Laying under sleeper pads under the railway sleeper can effectively solve the problem of insufficient elasticity. The under sleeper pad material under the railway sleeper is mainly composed of EPDM rubber and neoprene, and the part of the bottom in contact with ballast must have good puncture resistance. In addition, good mechanical properties, aging resistance and fatigue properties are all necessary characteristics of under sleeper pads.
Under sleeper pads and under-rail pads are indispensable parts for laying railways and are essential elements for ensuring railway safety. Choose under sleeper pads, must choose high quality under sleeper pads manufacturers. GNEE RAIL is always at your service.
