现代有轨电车小曲线段钢轨磨耗特性分析

Rail Wear Characteristics of Small Curve Section in Modern Tram

现代有轨电车线路条件受道路条件影响,小曲线路段较多,且交叉口平交段同社会车辆混行,因而轮轨磨耗现象严重。为了提升有轨电车钢轨寿命,减少运营阶段钢轨维修频率,通过现场调查、比较分析、仪器测试等手段,分析已运营有轨电车线路钢轨非正常磨耗的现状、分布规律以及典型磨耗区段的线路特征。实测过程中发现,部分轨道内外股钢轨踏面已偏离原始廓形,依靠外股的刚性导向作用,过大的横向作用力导致曲线外股侧磨严重。半径400 m以下的小曲线段钢轨主要磨耗类型为有规律的波浪形磨耗,属于典型的“响应型”波磨,符合有轨电车轻载运行的特点。

Modern tram line conditions are affected by road conditions,more small curve sections,and intersection leveling section mixed with social vehicles,so the wheel rail wear phenomenon is serious.In order to enhance the life of tram rails and reduce the frequency of rail maintenance during the operation stage,the current situation of abnormal rail wear of the operated tram lines,the distribution law and the line characteristics of typical wear sections are analyzed by means of on-site investigation,comparative analysis and instrumental testing.During the measurement,it is found that part of the track inner and outer strand rail tread has deviated from the original contour,relying on the rigid guiding effect of the outer strand,and the excessive lateral force leads to serious lateral wear of the outer strand of the curve.And the main wear type of small curve section below 400 m radius is regular wave wear,which belongs to typical"responsive"wave wear and is in line with the characteristics of light-load operation of streetcars.