地铁延伸线线路曲线顺接中的切圆法及对称法
田卫建
Cyclotomic Method and Symmetry Method in Curve Connection on Metro Extension Lines
TIAN Weijian
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作者信息:中国铁路设计集团有限公司，300142，天津
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Affiliation:China Railway Design Corporation, 300142, Tianjin, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2023.01.029
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中图分类号/CLCN:U231.3；U212.3
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栏目/Col:研究报告
摘要:
为有效解决外部因素发生变化时造成的既有地铁工程预留条件与现状工程条件非一致性的线位问题，提出一种新的顺接地铁延伸线线路方法——对称法。同时，将铁路设计中常用的切圆法应用于地铁线路设计，并在前缓和曲线及部分圆曲线线位不变的情况下，将其设计方法特性与对称法进行了对比。研究结果表明：切圆法同样能够应用于地铁线路设计，能较好地解决施工预留条件与现状的非一致性线位问题；对称法在圆曲线长度确定且前后缓和曲线长度一致的情况下，能够应用于地铁线路设计中，简化线路调整过程。
Abstracts:
To effectively solve the line position problem caused by the inconsistency between existing metro engineering reserved conditions and current engineering conditions when the external factors has changed, a new method of connecting the metro extension line—symmetry method is proposed. At the same time, the cyclotomic method commonly used in railway design is applied to metro line design, and its characteristics are compared with the symmetry method when the front transition curve is gentle and the line position of some circular curves is unchanged. Research results show that cyclotomic method can also be applied to the design of metro lines, and can better solve the problem of inconsistent line position between construction reserved conditions and current situation. Under the condition that the length of circular curve is determined and the length of front and back transition curves is consistent, symmetry method can be applied to the design of metro lines and simplify the process of line adjustment.
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