track ballast - Definition & Meaning

the layer of crushed stones or gravel placed under and around railway tracks to keep them in place and provide drainagethe layer of crushed stones or gravel placed under and around railway tracks to keep them in place and provide drainage

Track ballast is the layer of crushed stone or gravel placed beneath and around railway tracks. It helps to keep the tracks stable, ensuring they remain in position and do not shift under the weight of trains. Ballast also allows water to drain away from the track, preventing flooding and damage. The stones are arranged to distribute the weight of the trains evenly, which helps maintain the track's alignment and supports safe and smooth train movements. Ballast is essential for the durability and proper functioning of railway tracks.Track ballast is the layer of crushed stone or gravel placed beneath and around railway tracks. It helps to keep the tracks stable, ensuring they remain in position and do not shift under the weight of trains. Ballast also allows water to drain away from the track, preventing flooding and damage. The stones are arranged to distribute the weight of the trains evenly, which helps maintain the track's alignment and supports safe and smooth train movements. Ballast is essential for the durability and proper functioning of railway tracks.

例句

The workers spread new track ballast along the railway line to make the tracks more stable.
工人们沿着铁路线铺设了新的道碴，以使轨道更加稳定。
Without track ballast, the train tracks would shift and become uneven over time.
没有轨道道碴，铁轨会随着时间的推移而移动并变得不平整。
Track ballast helps to prevent the rails from moving when trains pass over them.
道碴有助于防止火车通过时轨道移动。