小半径曲线侵入有效站台曲线
超高设计研究 |
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引用本文: | 李 颖,张拔午.小半径曲线侵入有效站台曲线
超高设计研究[J].都市快轨交通,2023,36(6):57-61. |
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作者姓名: | 李 颖 张拔午 |
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作者单位: | 北京城建设计发展集团股份有限公司,北京 100037 |
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摘 要: | 在城市轨道交通车辆扩编、站台加长的既有线改造项目中,为克服小半径曲线侵入有效站台较多带来的
车辆限速问题,借鉴公路曲线超高的设计思路,提出将曲线超高过渡段设置在缓和曲线局部区段,全超高断面设
置在缓圆点或圆缓点处,通过缓和曲线分段顺坡的设计思路,并以北京地铁 13 号线扩能提升改造工程知春路站
车站加长为案例,进行缓和曲线分段顺坡的应用实践。研究结果表明,方案最大限度匹配进出站速度,节省了运
营时间。
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关 键 词: | 轨道交通 小半径曲线 轨道 运行速度 超高设置 |
Analysis of Superelevation for Small Radius Curves in Platform Areas |
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Institution: | Beijing Urban Construction Design and Development Group Co., Ltd., Beijing 100037 |
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Abstract: | This study proposes a design concept inspired by highway curve superelevation to address the speed limit issue
caused by small-radius curves encroaching on effective platforms in an existing line renovation project of vehicle expansion
and platform extension. The design involves setting a super-elevation transition section in local sections of the transition curve,
and a full super-elevation section at gentle or circular points. The transition curve is segmented and graded to reduce the impact of
small-radius curves on effective platforms. The Zhichun Road Station extension project of the Beijing Metro Line 13 expansion
and upgrading project is used as a case study to apply the segmented slope of the transition curve. The results show that the
proposed plan increases the maximum speed by 12.4 km/h and saves 6 s of operation time compared to the original plan. The
study provides a reference for the design of curve super-elevations in existing line renovation projects when small-radius curves
invade effective platforms. |
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Keywords: | rail transit small-radius curve track operation speed length of invasion platform of mitigation curve super-elevation settled in mitigation curve |
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