论文部分内容阅读
为了进一步研究无缝道岔受力和变形的特点,通过建立模型,利用现场实测数据,计算了道岔直侧股、道床捣固前后、岔区与区间线路的道床纵向阻力。计算得到12号道岔钢轨升温50℃时各部分的受力和变形结果。分析表明:直侧股道床纵向阻力相差越大,直曲基本轨处限位器作用力大小相差越大;道床捣固不密实引起的道床纵向阻力减小,会显著增大道岔各部分受力和变形;岔区道床纵向阻力的变化,相比区间线路道床纵向阻力的变化,对无缝道岔受力及变形影响要大。
In order to further study the characteristics of the stress and deformation of the seamless turnout, the longitudinal resistance of the ballast bed in the turnout zone and the interval line was calculated by establishing the model and using the field measured data. Calculate the stress and deformation of each part of No 12 turnout rail at 50 ℃. The analysis shows that the bigger the vertical resistance of the straight lateral bed is, the bigger the difference of the acting force of the limiter at the straight track is; the lower the longitudinal resistance of the ballast caused by the tamping of the track bed is not obvious, And deformation. The change of longitudinal resistance of ballast bed in turnout area has a greater influence on the stress and deformation of the turnout than that of longitudinal resistance in ballast bed.