论文部分内容阅读
自1968年以来,我国六千公里无缝线路上曾先后发生胀轨跑道事故多起。经调查及试验,认为事故的主要原因为:(1)违章作业;(2)长轨内存在着未被注意的额外温度力。在试验中证实了:(a)由于钢轨伸缩迟滞于温度变化,在长轨伸缩区可能产生比一般计算的温度力要大50吨。(b)由于在严寒季节作业,钢轨产生不正常收缩。曾发现某段钢轨锁定轨温自23℃变为4.4℃。(c)由于线路锁定不良,钢轨爬行,轨内各段锁定轨温发生变化。经调查17段长轨,发现长轨内各段锁定轨温非常混乱,有个别区段锁定轨温比工区掌握的低17.5℃之多。为确保行车安全,上述各因素在无缝线路设计及维修工作中应给予足够的重视。
Since 1968, there have been a number of incidents of expansion track accidents on the 6,000 km of CWR lines in our country. After investigation and test, the main reasons for the accident are: (1) illegal operation; (2) there is an unheeded extra temperature force in the long rail. It has been confirmed in the tests that: (a) As a result of the rail retarder retarding the temperature change, it is possible to generate 50 tons more than the calculated temperature force in the long-rail retractable zone. (b) Irregular shrinkage of rails due to working in cold season. Have found a section of rail locking rail temperature from 23 ℃ to 4.4 ℃. (c) Due to poor line locking and rail creep, the rail temperature changes at each section of the rail. After investigation of 17 long rails, it was found that the locking rail temperature in each section of the long rail was very chaotic. There were individual rail locking rail temperatures 17.5 ° C lower than those in the industrial area. In order to ensure traffic safety, all the above factors should be given enough attention in the design and maintenance of CWR.