摘要
青藏线K435+000—K535+000区间存在轨距角掉块、肥边等接触疲劳伤损,德令哈工务段柯柯车间管内上行线K386—K390区间曲线下股存在较为严重的波磨现象。通过实施廓形打磨轨面,接触疲劳病害和钢轨波磨得到有效治理。打磨后,青藏线钢轨肥边、轨面掉块治理效果明显,曲线上股轨距角处剥离掉块消除且工作边斜裂纹已缓解。100~300 mm波长段波磨打磨后最大谷深平均值由0.9 mm降至0.1 mm以下,有效改善钢轨轨面状态,钢轨廓形打磨质量指数(GQI)达到优良水平,不平顺轨道质量指数(TQI)指标由打磨前最大7.27降至6.78,降幅6.8%,添乘体感改善明显。
There are serious corrugations on the lower curue rail between K386 and K390 of the upgoing line in Keke workshop of Delingha work section of Qinghai-Tibet railway.Some curves and straight lines from K435 to K535 have fatigue damage such spalling and fat edge.The corrugations on the rail surface and rail surface diseases had been effectively controlled through profile grinding.After grinding,the average value of the maximum depth after wave grinding in the wavelength range of 100~300 mm was reduced from 0.9 mm to below 0.1 mm,the rail surface condition was effectively improved,the rail GQI reach the excellent level,and the TQI was reduced from 7.27 to 6.78,with a decrease of 6.8%.The feeling of passengers was significantly improved.
作者
马红斌
MA Hongbin(Works Department,China Railway Qinghai-Tibet Group Corporation Limited,Xining Qinghai 810000,China)
出处
《高速铁路新材料》
2023年第2期58-63,共6页
Advanced Materials of High Speed Railway
关键词
青藏线
钢轨病害
自激振动
曲线波磨
钢轨廓形打磨
Qinghai-Tibet
rail diseases
self-excited vibration
curve wave grinding
rail profile grinding
