基于专业协同的轨道交通线路改造方案研究

Research on the Overall Reconstruction Scheme of Rail Transit in Operation Based on Professional Synergism

研究目的:针对大型铁路枢纽接入运营轨道交通线路引起的既有线改造问题,以减小中断运营时间为基本出发点,在统筹考虑实施难度的基础上,提出既能满足后期运营需求也能最大程度减小工期与实施难度的整体改造方案。研究结论:(1)基于影响范围最小、中断时间最短原则,提出了主支线贯通运营的线路整体改造方案;(2)对于高架车站,采用楼扶梯分期破除、中板扩建预留凹槽与既有天桥连接等措施,可形成不中断运营的车站两侧分期帮接拓建工艺;(3)对于高架区间,基于平行作业、前后工序有效衔接原则,提出了侧位现浇、横向平移的桥梁改造工艺,可最大程度减少中断运营时间;(4)对于站后工程,基于专业协同与交叉施工原则,发现轨道敷设与接触网改造为控制性工序,同时接触网改造工期可以包含环网电缆改造、给排水改造、通信改造与信号安装调试等作业时间;(5)本研究结论可为类似轨道交通改造工程提供参考。

Research purposes:As for the reconstruction of operated rail lines caused by its connection with large railway hubs,the reduction of the interruption time of rail operation is the most important factor should be considered.Considering the reconstruction difficulty,the method that can not only meet the railway operation requirements,but also can reduce reconstruction period and reconstruction difficulty,is put forward.Research conclusions:(1)The overall reconstruction method for elevated rail line based on the minimum influence range and the shortest outage time,which can realize the operation of main line and branch line,is put forward.(2)As for elevated station,escalators will be dismantled in stages,the reserved groove in broadened middle plate is adopted in the connection with pedestrian bridge.And the adjacent reconstruction method for elevated station in stages without interrupting metro operation can be formed.(3)As for elevated railway interval,based on the basic principle of parallel operation and effective connection of successive process,the casting technology of elevated bridge with lateral position and lateral translation is put forward.And then,the least interruption time for rail transit operation can be realized.(4)As for the post-station engineering,based on the principle of professional synergism and crossed construction,the controlling process of track laying and catenary transformation is found,and the catenary transformation time can include the time of reconstruction of ring cable,water supply and drainage,communication transformation,and signal installation and debugging.(5)The research results can lead a reference for similar project in future.