当无缝线路长轨节的轨温升高时,钢轨纵向受压,钢轨随轨温的升高而很快伸长。因此,必须在长轨两端的一定距离内进行锁定,锁定轨温一般接近锁定轨温范围的上限t_3,有时还可能高一些。(如表1) When the track temperature of the long track of the seamless track rises, the rail is pressed longitudinally, and the rail quickly expands as the rail temperature increases. Therefore, it must be locked within a certain distance of the two ends of the long rail. The temperature of the locking rail is generally close to the upper limit of the temperature range of the locking rail t_3, and sometimes it may be higher. (Table 1)