城市轨道交通既有线扩编改造类型与实施要点

Types and Implementation Key Points of Expansion and Renovation for Urban Rail Transit Existing Lines

[目的]目前,城市轨道交通部分线路的客流需求与运力供给矛盾突出,扩编改造作为提升线路运输能力的一种方式,在国内外已有较多的探索与应用,但尚无系统性的梳理与总结,对后续扩编改造具体工作的指导性不足。因此,有必要对城市轨道交通既有线扩编改造类型与实施要点进行归纳与分析。[方法]梳理国内外城市轨道交通扩编改造典型案例,并进行类型划分;以不同改造类型的典型案例为研究对象,分析其线路改造内容,归纳总结不同类型的扩编改造实施要点,并提出相关建议。[结果及结论]扩编改造工程可划分为三类。对于站台空间已做条件预留的扩编改造,其重点在于车辆设备的改造,需要在设计时就确定好改造前、后的相关技术参数;对于站台空间未做预留、但不对站台进行扩建的扩编改造,其重点在于车门开启方式与站台门的改造,确保乘客疏散时间能够满足安全运营要求;对于扩建车站站台并对相关土建设施与机电设备进行大规模改造的扩编改造,扩建设施应与既有设施的结构相对独立,扩建设施应满足客流通行乘降需求和消防疏散要求。

[Objective]At present,some urban rail transit lines face significant mismatches between passenger flow demands and capacity supply.Capacity expansion and renovation is the common approach to enhance line transportation capacity.In spite of various explorations and applications in China and abroad,a systematic sorting and summary is absent,causing lack in guidance for subsequent specific expansion and renovation work.Therefore,it is necessary to summarize and analyze the types and key implementation points of capacity expansion and renovation for the existing urban rail transit lines.[Method]Typical cases of urban rail transit capacity expansion and renovation both in China and abroad are sorted and categorized.Taking typical cases for each renovation type as the research objects,the line renovation contents are analyzed,the key implementation points for capacity expansion and renovation are summarized,and relevant recommendations are put forward.[Result&Conclusion]The capacity expansion and renovation projects can be classified into three categories.For the expansion with reserved platform space conditions,the focus is on renovating the vehicle equipment,and it is crucial to establish relevant technical parameters for pre-and post-renovation at design phase.For the expansion of preserving the current status without reserved platform space,the emphasis is on the vehicle door opening methods and modifying platform doors to ensure that passenger evacuation time can meet the safe operation requirements.For station platform expansion with major renovations on relevant civil engineering facilities and electromechanical equipment,the expansion facilities should be structurally independent of existing facilities,and meet the passenger flow passing,boarding and alighting requirements,and fire evacuation standards.