Reasons Why Crushed Stones Alongside Railway Tracks
Reasons Why Crushed Stones Alongside Railway Tracks
Those crushed stones you see alongside railway tracks are called ballast, and they play a vital role in keeping the tracks safe and functional. Here are some of the key reasons they’re there:
1. Support and Stability:
- The ballast acts as a bed for the railway sleepers (the wooden or concrete crossties that hold the tracks). These stones distribute the weight of trains evenly, preventing the tracks from sinking or becoming uneven.
- The sharp edges of the stones interlock with each other, providing lateral stability and preventing the tracks from spreading outwards.
2. Drainage:
- The gaps between the stones allow water to drain away from the tracks, preventing waterlogging and potential track damage. This is especially important in areas with heavy rainfall or snowmelt.
3. Expansion and Contraction:
- Train tracks expand and contract with temperature changes. The ballast allows for this movement without causing the tracks to buckle or warp.
4. Vegetation Control:
- The stones prevent weeds and other vegetation from growing around the tracks, which could interfere with the track’s stability and drainage.
5. Insulation:
- The ballast helps to insulate the tracks from extreme temperatures, which can be important in areas with very hot or cold climates.
6. Sound Dampening:
- The ballast helps to absorb some of the noise generated by trains, reducing noise pollution for nearby residents.
Overall, the crushed stones alongside railway tracks are a crucial component of safe and efficient train travel. They provide support, stability, drainage, and other essential functions that keep the tracks in good condition and allow trains to operate smoothly.