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5铺轨在欧洲,大多数的高速线采用有碴轨道。德国铁路时速200 km以上的线路采用无碴轨道。法国在时速220 km的地下区间也采用了无碴轨道。(1)道碴每个国家道碴和底碴的特征(粒径分布、最小厚度)见表6。各国铁路间的一个不同点即列车的质量。除西班牙外,其他国家时速超过300 km的
5 Laying In Europe, most high speed lines use ballasted rails. German railways with a speed of 200 km / h are ballasted. France also uses ballastless track in an underground section of 220 km / h. (1) Ballast Characteristics of each country’s ballast and ballast (particle size distribution, minimum thickness) are shown in Table 6. A difference between the national railway that train quality. Except Spain, other countries are over 300 km / h