城市轨道交通小半径曲线设计探讨

On Small Radius Curve Design for Urban Rail Transit

城市轨道交通选线的限制性边界条件较多。在城市轨道交通线路选线中经常会遇到需精细化定线的情况。分析总结了小半径曲线精细化选线的影响因素。以杭州地铁2号线二期为例,介绍了在城市轨道交通实际选线中的小半径曲线精细化定线的设计思路,详细论述了精细化定线设计过程中的4个方案及各方案的优缺点,并进行了分析比选。最终,杭州地铁2号线二期工程选择了只拆除公建房的270 m半径曲线方案,实现了各方要求。

The boundary condition for urban rail transit line selection is restricted. The alignment of urban rail transit line often encounters the situation of refinement design requirements. Based on the Phase II of Hangzhou metro Line 2 practice, the factors influencing the refinement design of rail transit small radius curve are analyzed and summarized, the design idea is introduced, 4 design schems are described in detail, including their advantages and disadvantages. Finally, the scheme of 270 m small radius curve is recommen- ded, it only demands the demolishment of some public houses but will meet the requirements of all the parties related.