基于主线不停运的城轨支线独立运营改造方案

Research on the Independent Operation Reconstruction Scheme for Branch Metro Line Based on the Normal Operation for Main Metro Line

研究目的:针对大型铁路枢纽接入已运营轨道交通线路引起的既有线改造问题,为满足铁路枢纽与轨道交通连接线(支线)施工期间主线正常运营不受影响,对改造涉及的运营组织与接轨方案进行系统研究,并对土建、轨道、接触网、环网与动照、信号、综合监控与通信系统等的改造及影响进行深入研究,在统筹考虑实施难度、投资与工期的基础上,提出实施风险最小、技术最合理的改造方案。研究结论:(1)既有高架车站与区间改造影响范围较小且相对可控,可以实现主线正常运营情况下新建独立运营支线工程;(2)为最大程度保障主线运营不受影响,在现有技术水平条件下,应尽量避免在运营天窗期进行各类信号光电缆的割接;(3)支线独立运营方案,应尽量采取措施将新建支线与主线相连、轨道相通,以利于车辆检修与维保,并增加运营的灵活性;(4)桥梁浇筑与平移施工临近既有线,实施阶段应进一步完善工艺衔接与交叉施工统筹,增加既有线安全保障;(5)本研究结论可为类似工程提供参考。

s:Research purposes:As for the reconstruction of operated metro lines caused by its connection with large railway hubs,in order to meet the normal operation of main lines during the branch line construction,the operation organization and train integration scheme involved in metro line reconstruction are systematically studied.Moreover,the transformation and influences of civil construction,track system,catenary system,ring cable and power lighting,signal system,comprehensive monitoring and communication system are deeply studied.Considering the reconstruction difficulty,cost and construction period,the reconstruction method with the least implementation risk and the most reasonable technology is put forward.Research conclusions:(1)The influences on high-levered metro station and intersection are relatively small and can be controlled,and then the branch line can be realized while the main line is under normal operation.(2)In order to maintain the normal operation of main line during the construction of branch line,the cut and reconnection of sign cable in nonrunning time using current technology should be avoided.(3)As for the branch line based on independent operation,the rail track of branch line should be connected with the track in main line.Then,the maintenance service of rail train can be in great convenience,and the operation flexibility can be obtained.(4)The bridge casting and its parallel shifting are near the operating main line,the process linkage and the planning of cross construction should be optimized.And then,the flexible operation of metro line can be enhanced.(5)This paper can provide a reference for similar project in future.