提速线路轨温对轨道横向位移影响实测分析

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

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。

Through the field - testing of the rail tempera- ture and the lateral displacement in curve sections of a cer- tain speed- up line, this paper analyzes the effect of the track structure of the curved section on the lateral displace- ment of rail array when the rail temperature changes. The results show that when rail temperature is lower, such ran- dom factors as train loading forcing and so on are the main causes while the temperature is higher, the rail tempera- ture stress becomes the main cause of the lateral displacement of rail array. Because of the big differences of wave- forms 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.