城市轨道交通轨道曲线超高计算及其程序实现

城市轨道交通存在着线路条件复杂、车辆变速较快、运营模式多样等特点,导致轨道曲线超高设计面临着诸多不同的复杂工况。在总结超高计算原则及超高要素限值的基础上,探讨单一速度模式、多种速度模式、缓和曲线进入有效站台等不同工况下超高计算方法并实现计算程序化,结论为:根据不同工况合理选择超高要素限值,单一速度模式宜采用平均速度法,多种速度模式宜采用优化的接近高速法,缓和曲线进入有效站台应以站台端部超高不大于15 mm作为限制条件,采用计算机语言实现超高计算程序化可有效提高设计效率。

Rail Curve Superelevation Calculation and Program Realization of Urban Mass Transit

Due to the complicated route condition, rapid vehicle speed variation, and diversified operation modes,elevation design of rail curve is faced with complicated working situations. Based on the design principles for super elevation calculation and superelevation factor limits,this paper focuses on superelevation calculation methods and program realization under such working conditions as single-speed mode,multi-speed mode,and easement curve entering platform. The results show that superelevation factor limits are selected according to different working conditions. Average speed method should be adopted for single speed mode. For multi-speed mode,optimized approaching high speed method should be adopted. In order to ease the curve entering effective platform,15 mm should be taken as the restriction for the end platform superelevation. Using computer programming may effectively improve the design efficiency.