摘要
苏州地铁设计路线的缓和曲线在直缓点前15.8m处提前加入超距改正,且超距分段线性变化。采用切线支距法在同一坐标系下推导了缓和曲线各个分段的坐标数学模型,并利用VC 6.0编写了坐标自动放样的程序。此数学模型在苏州地铁1号线某区间施工中得到了很好的应用。
Ultra-distance mathematical model of Clothoid Curve in Suzhou Subway adds a 15.8 meters ultra-distance in advance which changes linearly in front of the ZH point. A mathematical model of every section on the Clothoid curve in the same coordinate system is derived by using the tangent offsets, and an automated coordinates setting-out program is developed by using VC6.0 language. This model has been adopted in the construction of Suzhou subway Line 1 and its application is tested through practical engineering.
出处
《城市轨道交通研究》
北大核心
2013年第7期85-87,共3页
Urban Mass Transit
关键词
地铁线路
缓和曲线
切线支距法
坐标放样
subway line
Clothoid curve
method of tan-gent offsets
coordinates setting-out
