一种适用于远期拆解的线路与站型设计方法

A Method of Line and Station Design Suitable for Future Disassembly

目的:随着城市规划和地铁线网的发展,远期地铁线网不可避免出现拆解的情况,为降低远期地铁线路拆解的难度和代价,通过对我国既有的丰富的地铁线路拆解项目案例的调研,充分吸收和分析了众多拆解方法的优点和不足,提出了一种适用于远期拆解的地铁线路与站型设计方法。方法:通过线路平纵设计软件,进行数字化线路平面设计和纵断面设计,设计2条线路汇交处具备站台平行换乘条件,设置四线双岛站台,站台前后配置丰富灵活的配线组合,考虑前后线路立交段的纵向施工安全净距,预留好近远期延伸施工条件,利用道岔的分向功能实现拆解。结果及结论:该地铁线路与站型设计方法只适用于在规划、设计阶段提前进行设计预留且具备两线站台平行换乘和区间立交条件的情况。该地铁线路与站型设计方法不仅适用于地下敷设形式,也适用于高架或者地面敷设形式。结果表明,该地铁线路与站型设计方法能避免对既有结构造成破坏,不会产生废弃工程,施工风险和难度低,工程费用低,换乘便捷,运营组织丰富灵活,具备互联互通和线网资源共享功能,既能服务近期的客流发展需求,又能满足远期城市规划调整的变化需求,能产生很好的社会、经济和技术效益。

Objective:With the development of urban planning and metro line networks,the future disassembly of metro line networks becomes inevitable.To reduce the difficulty and cost of this assignment,by investigating numerous existing metro line disassembly projects in China,the merits and shortcomings of various disassembly methods are fully taken in and analyzed,thus a new method of metro line and station design suitable for future disassembly is researched and proposed.Method:Using line level and longitudinal design software,the line planar layout and longitudinal cross-section are digitally designed.The intersection of two lines equipped with parallel interchange platform is designed,a four-track,double-island platform with various and flexible auxiliary line combinations at platform front and end is set up.Considering the vertical construction safety clearance between the front and rear elevated lines in intersecting sections,the future extension construction conditions are preserved pertaining to the directional function of turnout to facilitate disassembly.Result&Conclusion:This method of metro line and station design is applicable only when it is preserved in the planning and design stages,including parallel interchange platforms and interval vertical intersecting conditions.The proposed method can be applied to underground laying,as well as elevated or ground level laying.Results show that the proposed method can avoid damage to existing structures,prevent wasteful projects,reduce construction risks and difficulties,lower project costs,provide convenient interchange options,enable flexible operation organization,and facilitate interoperation and resource sharing within the network.It can meet the demands of both serving current passenger flow development and satisfying future urban planning adjustments,thereby generating significant social,economic,and technological benefits.