大跨桥桥上无缝线路检算浅析

新建南河川渭河特大桥为客运专线双线铁路桥,桥上铺设CRTSⅠ型双块式无砟轨道,采用一次铺设跨区间无缝线路.桥梁主跨结构为（75 ＋3 ×120 ＋75）m连续梁,大里程端温度跨度达到364 m,在连续梁大里程处设置伸缩调节器.以渭河特大桥为例,采用有限元法建立桥上无缝线路空间耦合模型,对设置了伸缩调节器的桥上无缝线路进行检算,并提出设计人员在检算过程中应当注意的问题.

Analysis of Inspecting Calculation of CWR Overcross Bridge

Nanhechuan Weihe River super large bridge is a double track passenger dedicated line railway bridge. CRTS I double block ballastless track is laid on the bridge with single laying of cross-CWR. The main span structure is continuous beam of （75 ＋ 3 × 120 ＋ 75 ） m. The temperature span of the big mileage is 364 m. Telescopic adjustment is set at the big mileage of the continuous beam. Space coupled model of CWR on bridge was established with using the finite element meth-od to calculated the telescopic adjustment set on the bridge. And it puts forward the current design problems which should arouse the designers＇ attention in the process of check computation.