提速线路轨温对轨道横向位移影响实测分析

通过对某条提速线路曲线段的轨温及横向位移进行现场测试,分析了曲线段轨道结构在轨温变化时对轨排横向位移变化的影响.分析结果表明:在轨温较低的情况下,列车荷载激扰等随机因素是轨排横向位移的主因；在轨温较高时,轨排横向位移的主因则是轨道温度力.曲线段轨排横向位移的波形差异性较大,在日常工务养护中应以缓圆点附近的曲线作为养护重点.

Experimental Analysis of the Effect of Rail Temperature on the Track Lateral Displacement on Speed Boost Lines

Through the field-testing of the rail temperature and the lateral displacement in curve sections of a certain speed-up line,this paper analyzes the effect of the track structure of the curved section on the lateral displacement of rail array when the rail temperature changes.The results show that when rail temperature is lower,such random factors as train loading forcing and so on are the main causes;while the temperature is higher,the rail temperature stress becomes the main cause of the lateral displacement of rail array.Because of the big differences of waveforms of the track lateral displacement in curve sections,the curve near the gradual circled dots should be taken as a conservation focus in daily maintenance works.