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通过对遂渝铁路无碴轨道综合试验段路隧过渡段路基动力学响应的现场实车测试,分析在CRH2动车组和C80重载货物列车作用下的路基与隧道刚性渐变混凝土过渡段的路基面动应力响应特性。测试数据表明:行车速度的提高对路基面动应力的增加影响显著,路基面动应力沿线路纵向基本呈波浪型台阶变化,轴重对动应力的幅值和速度影响系数、沿线路纵向的动应力变化坡度都有一定的影响。
Through on-the-spot test of dynamic response to the dynamic response of subgrade at transitional section between tunnel and tunnel in the comprehensive experimental section of ballastless track on Suining-Chongqing railway, the roadbed surface of subgrade and tunnel rigid concrete transitional section under the action of CRH2 EMU and C80 heavy freight train are analyzed. Dynamic stress response characteristics. The test data shows that the increase of driving speed has a significant effect on the dynamic stress increase of the roadbed. The dynamic stress of the subgrade changes along the longitudinal direction of the road basically in the form of wave. The influence of axle load on the amplitude and speed of dynamic stress, The slope of stress changes have a certain impact.