浅谈铁路最大坡度差取值问题

STUDY ON SELECTION OF MAXIMUM DIFFERENCE INRAILWAY GRADIENTS

为了确保铁路列车运行的安全与稳定，《铁路线路设计规范ＧＢＪ９０—８５》（简称《线规》）对铁道线路纵断面设计中的相邻坡段最大坡度差（△ｉ＿（ｍａｘ））作出了明确规定，即：“相邻坡段的连接宜设计为较小的坡度差，最大不得超过重车方向的限制坡度。”要求△ｉ＿（ｍａｘ）必须保证不断钩、不脱轨、不脱钩及行车平稳。本文进一步研究了这一坡度差的取值问题。

To ensure safety and running smooth of the railway trains,according to the Rail-way Track Design Standards GBJ90-85,the maximum difference in gradients △i_(max) of the adja-cent slope-sections used in the vertical-sectional design of the railway tracks had been definedclearly as:the smaller difference in gradients should be used in the designs for connecting theadjacent slope-sections,and the maximum value should not exceed the limiting slope in theheavyhaul direction,The value of△i_(max),must be used so as to ensure running smooth,un-de-rail,no uncoupling and no coupler broken. This value has been further researched in this pa-per.