城市轨道交通单渡线精细化设计研究
甘元佳
Research on Refined Design of Single Crossover in Urban Rail Transit
GAN Yuanjia
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作者信息:中铁二院工程集团有限责任公司，610031，成都
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Affiliation:China Railway Eryuan Engineering Group Co., Ltd., 610031,Chengdu, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2025.01.020
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中图分类号/CLCN:U231.2
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栏目/Col:研究报告
摘要:
［目的］城市轨道交通高质量发展关键在于降本、增效、可持续，需要精细化设计、降低设计冗余。渡线是地铁车站设计中最常见的配线之一，对单渡线长度进行精细化设计研究，可减少道岔区土建工程量，节省投资。［方法］以最大限度地缩短渡线长度为目标，通过建立线间距、单渡线长度、插入反向曲线的圆曲线半径及偏角之间的计算模型，对单渡线长度精细化设计进行研究。［结果及结论］采用9号道岔计算，按岔区长度减幅5%的显著性水平考虑，A型车线间距≥10.207m时(或B型车线间距≥9.440m时)，宜采用插入反向曲线的单渡线；对A型车而言，当线间距≥12.3m时(或B型车线间距≥10.9m时)，反向曲线的圆曲线半径R取下限值200m，可使单渡线总长最短；对A型车而言，当线间距<12.3m时(或B型车线间距<10.9m时)，为满足反向曲线的圆曲线最小长度要求，R需适当增大；R和圆曲线偏角φ的最优组合可由计算模型反算得到。
Abstracts:
［Objective］ The key to high quality development of urban rail transit lies in cost reduction, efficiency improvement, and sustainability, requiring the refined design and the reduction of design redundancy. Crossovers are one of the most common sidings in the design of metro stations, and research on the refined design of single crossover length can reduce the civil engineering quantity in the turnout area and save investment. ［Method］ Aiming at minimizing the length of single crossover, a calculation model for the distance between track centers, the length of the single crossover, the circular curve radius inserted with the reverse curve and deflection angle is established to study the refined design of the single crossover length. ［Result & Conclusion］ The research results show that: Using No. 9 turnout for calculation and considering the significance level of a 5% reduction in the turnout area length, when the track centerline distance for Type A vehicle is ≥10.207 m (or when the track centerline distance for Type B vehicle is ≥9.440 m), it is recommended to adopt the single crossover with an inserted reverse curve. When the track centerline distance is ≥12.3 m for Type A vehicle (or when the track centerline distance is ≥10.9 m for Type B vehicle), the circular curve radius R of the reverse curve takes the lower limit value of 200 m, which can make the total length of the single crossover the shortest. When the track centerline distance is <12.3 m for Type A vehicle(or when the track centerline distance is <10.9 m for Type B vehicle), R needs to be appropriately increased in order to meet the minimum length requirement for circular curve of the reverse curve. The optimal combination of R and the deflection angle φ of the circular curve can be obtained by back-calculating from the calculation model.
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