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沈大线大连工务段管内137K～142K区段,地处山区大岭,地质条件复杂,线路坡度大,曲线半径在600m以下。随着运量、车速、轴重的变化,“咬铁”现象十分严重,大大缩短了换轨周期。同时,出现周期性晃车、轨距变化迅速、正矢难以保持等现象,以致
The section of 137K ~ 142K in Dalian Pipeline of Shenyang-Dalian line is located in Dalingshan Mountain with complex geological conditions, large slope and a radius of 600m below the curve. With the volume, speed, axle weight changes, “bite iron ” phenomenon is very serious, greatly reducing the orbit change cycle. In the meantime, the cyclical swing cars, rapid changes in gauge, is difficult to maintain such phenomena, so that