京哈线秦沈段于2007年以来,列车运行速度提高到250 km/h,显现出许多线路病害。其中主要病害有38号道岔、滑床板下的大胶垫、轨距块和垫板难以保证线路作业精度、附加侧向弯矩和小轨距,车轮对尖轨作用边有磨痕,焊头轨面不平顺和滑床板与尖轨轨底有缝隙等,针对病害类型采取了相应的整治措施。 Since 2007, the train speed has been increased to 250 km / h in Jing-Ha-Qin-Shen section, showing many line diseases. One of the major diseases are No. 38 turnouts, large pad under the slider bed, track blocks and pads difficult to ensure the line operation accuracy, additional lateral bending moment and the small gauge, the wheel on the edge of rail wear marks, welding head Rail surface is not smooth and skateboarding board with a sharp rail track at the end of the gap, etc., for the type of disease to take the appropriate remediation measures.