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通过对遂渝铁路刚性路基进行动应力现场测试,分析研究刚性路基沿路桥过渡段线路纵向的动应力分布规律、列车速度和动应力的关系以及列车驶向对动应力的影响;并且将测试数据与一般路基过渡段进行对比分析。分析表明:桥隧间刚性短路基较好地解决了路桥间长期存在的巨大刚度差问题,表现为桥台及其附近位置的路基面动应力值相对较小并变化平稳。
Through the on-site dynamic stress test of the rigid subgrade in Suining-Chongqing railway, the dynamic stress distribution along the length of the transitional section of rigid subgrade along the road and bridge, the relationship between train speed and dynamic stress and the influence of train heading on dynamic stress are analyzed. The test data Compared with the general subgrade transitional section. The analysis shows that the rigid short-circuit bridge between tunnels and tunnels solves the long-term problem of huge stiffness difference between road and bridge, which shows that the dynamic stress of subgrade at abutment and its vicinity is relatively small and stable.