城市轨道交通轨道工程拆解设计方案研究

Study on Dismantling Scheme of Urban Rail Transit Line Track Engineering

目的:受建设规划和建设时序的影响,部分城市轨道交通线路在运营远期需要拆解。轨道工程的整体道床一旦浇筑后难以整改,这是轨道拆解的重点和难点。为确保线路拆解的可行性和高效性,在前期设计阶段需优化轨道配置,并预先设计合理的拆解方案。方法:以某城市轨道交通1号线的区间轨道工程拆解为例,在介绍该线拆解前后线路走向的基础上,对该线轨道拆解的重点及难点进行分析。对该拆解工程的2个备选方案(树脂枕道床方案及预制板道床方案)进行深入研究,对各方案的具体拆解措施、拆解范围、拆解过程及拆解时间等方面进行了重点分析,并对2个备选方案进行比选,得到推荐方案。结果及结论:推荐采用树脂枕(推荐采用一体化树脂枕)道床方案。该方案既可实现前期运营阶段的超高需求,又可具备后期拆解的超高调整要求,还可减小拆除工程量,缩短拆解时间,减小线路中断运营时间。

Objective:Due to the influence of construction plans and sequences,some urban rail transit lines need to be dismantled in the long-term operation.Once the overall track bed in the rail project is poured,it is difficult to make overall changes,which is the key and difficulty in dismantling rail lines.In order to ensure the feasibility and efficiency of line dismantling,it is necessary to optimize the track configuration and pre-set reasonable dismantling plans at the preliminary design stage.Method:Taking the dismantling of an interval track project of urban rail transit Line 1 in a city as an example,the key and difficult points of the track dismantling based on the introduction of the line pre-and post-dismantling route direction are analyzed.Two alternative plans for the dismantling project(resin sleeper bed plan and prefabricated slab bed plan)are studied in depth,and the specific dismantling measures,dismantling scope,dismantling process,and dismantling time of each plan are analyzed in detail.The two alternative plans are compared to obtain the recommended one.Result&Conclusion:It is recommended to adopt a resin pillow(integrated resin pillow is recommended)for the roadbed design.This solution can not only meet the extremely high demand in the early operation stage,but also the ultra-high adjustment requirements in the later disassembly stage.It can also reduce the amount of disassembly work,shorten the disassembly time,and decrease the operation interruption time in the route.