中美铁路道碴规范的比较研究

Comparison between Chinese and American Railway Ballast Standards

比较中美两国铁路道碴规范,结果表明:中国规范没有明确道碴岩性,美国规范明确道碴岩性。中国底碴、面碴均为单一级配,美国规范中面碴级配形式有7种,而底碴级配不固定,与面碴及路基填料的颗粒级配有关。中国面碴根据7项性能16个物理参数分为一级道碴和二级道碴,美规中面碴不分等级,但根据岩性,所检5项性能7个参数各不同。中国底碴需要检测4项性能6个参数,美规中底碴需要检测5项性能8个参数,但参数具体要求没有明确给出,各铁路公司可自行确定。

The railway ballast standards are compared between China and America. The results show that there was no specification for ballast material in Chinese standard, but American standard have. The gradation number of ballast and subballast is unique in Chinese standard, but American ballast has 7 gradations. The gradations of subbalfast are related to the gradations of ballast and embankment filler in American standard. According to 16 parameters, the ballast is classified into two levels in Chinese standard, but it is not classified in American standard. According to ballast material, 7 parameters of ballast need to be tested in American standard. For subballast, there are 6 parameters in Chinese standard and 8 parameters in American standard, but the values can be defined by the individual railway companies in American standard.