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Fav十万个为什么
为什么铁轨要铺碎石？
铁轨要铺碎石主要是为了分散压力、提供缓冲和减震、以及排水和稳定轨道共同作用的结果。
1、分散压力。碎石层能够将列车和轨道的重量均匀分散到路基上，减小单位面积的压力，避免路基因承受过大的集中压力而损坏。
2、提供缓冲和减震。碎石之间的缝隙可以吸收列车运行时产生的震动和冲击力，减少对轨道和路基的破坏，同时提高列车的运行平稳性和乘坐舒适性。
3、排水和稳定轨道。碎石层具有良好的排水性能，能够迅速排除雨水和地表水，防止路基因积水而软化或变形。此外，碎石层还可以固定轨枕，防止轨道因外力作用而移位，确保轨道的稳定性。
总结：铁轨要铺碎石是为了分散压力、提供缓冲和减震、以及排水和稳定轨道共同作用的结果。
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