提速线路钢轨的大修周期

通过对全路在役钢轨的使用状况和伤损情况进行调查研究,提出了钢轨伤损加权统计方法,对取得的数据进行统计分析,给出我国线路上在役U71Mn钢轨和U75V热轧钢轨伤损量与累计通过总重对比关系及加权统计基础数据;将工程经济学原理应用于钢轨使用的经济分析,获得钢轨的最佳经济下道时机;在统计分析我国钢轨伤损类型和原因的基础上,提出确定钢轨大修周期的原则,参考国内外钢轨大修周期取得的研究成果,提出了累计通过总重与钢轨伤损量相结合的大修周期模式及其指标。

Major Repair Cycles of Rails of Speed-raising Railway Lines

Based on all-round investigation of the use and failures of Chinese railways rails in service, the method of weighting statistics for rail failures is proposed in this paper. The weighting statistic data and relationship between the rail failures and corresponding accumulative passing gross are presented for Rails U71Mn and U75V in service. Applying the theory of engineering economics, the optimum overhaul time of rails is obtained. The principle for determination of major repair cycles of rails is suggested after statistically analyzing the rail failure types and causes in China. The mode of combining rail failures with the accumulative passing gross to fix the major repair cycles and the relevant parameters are found with reference to the domestic and international research results.