城市轨道交通环线分类及其设置条件

基于国内外城市轨道交通环线的最新建设情况,按照功能和线路形态对环线分类归纳,分析不同类型环线的作用、特点、适用范围和设置条件,总结国内外环线规划建设经验。分析得出:独立环线是结构性环线的最主要形式,约占结构性环线总量的50%;国内以独立环线和组合环线为主,组合环线的内涵在国内有了极大丰富,并对比分析两者的区别及适用范围;独立环线适合强中心、各方向发展较为均衡的城市,组合环线适用于发展不均衡、环线周向出行不多或向心客流少、对环线分流截流功能需求不高的城市。

Classification and Setting Conditions of Urban Rail Transit Circle Lines

Based on the latest construction of urban rail transit circle lines in the world,circle lines are classified according to the function and form.Then,the characteristics,the scope of application and setting conditions of different types of circle lines are analyzed.The paper summarizes the planning and construction experience of the existing circle lines.It is concluded that the independent circle line is the main form of circle lines in the world,which accounts for 50％ of structural circle lines.Independent circle lines and combination circle lines are the main forms in China,and the content of combination circle lines has been enriched,and their application scope and differences are also analyzed.Independent circle lines can be applied to cities with a strong center and balanced development.Combination circle lines can be built for the cities with unbalanced development,few travel in the circle or less centripetal passenger flows and low demand on the function of diversion and closure.