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针对大兴线跨京开高架桥上双向钢轨伸缩调节器的布设情况,运用梁轨相互作用原理,进行桥上无缝线路纵向力计算,通过对桥墩受力、轨道强度、无缝线路压弯变形、钢轨断缝等进行检算,论证了取消该桥上钢轨伸缩调节器,铺设无缝线路的可行性,以期为我国城市轨道交通跨区间无缝线路的设计提供相关参考。
According to the layout of bidirectional rail extension and retraction adjusters on the viaduct across Beijing-Kaihe Bridge of Daxing Line, the longitudinal force of the seamless lines on the bridge is calculated using the principle of interaction between beams and rails. Deformation, broken rail and so on. The feasibility of eliminating rail expansion and contraction regulator and laying of CWR on the bridge is demonstrated in order to provide reference for the design of cross-section CWR in China’s urban rail transit.