《地铁设计规范》中线路曲线超高-缓和曲线长度取值探讨  

Discussion on the Value of Curve Superelevation&Transition Curve Length in the“Code for Design of Metro”

作　　者：梁创佳 LIANG Chuangjia(Guangzhou Metro Design&Research Institute Co.,Ltd.,Guangzhou 510010,China)

机构地区：[1]广州地铁设计研究院股份有限公司,广州510010

出　　处：《铁道勘察》2023年第6期103-107,共5页Railway Investigation and Surveying

基　　金：广州地铁设计研究院股份有限公司科技开发课题(YK-2018-015)。

摘　　要：实际工程中,如果按GB 50157—2013《地铁设计规范》中线路曲线超高-缓和曲线长度表来设计线路曲线,曲线最高限制速度达到最大值的情况下,曲线超高时变率大部分超过40 mm/s,会影响乘客舒适度。为确保乘客舒适度,一般会减小曲线最高限制速度,从而影响全线的旅行速度。为了解决该问题,采用因素分析法,综合分析缓和曲线长度取值的影响因素,以及分析《地铁设计规范》中曲线超高和缓和曲线长度取值的计算原理,结合实际工程,提出列车最高运行速度为80,90,100 km/h的线路,曲线半径分别为≤450,600,700 m时,缓和曲线长度在《地铁设计规范》规定的基础上增加5 m,以提高小半径曲线的限制速度和最高运行速度,从而提高全线的旅行速度。During the actual project,if the line curve is designed according to the table of curve superelevation&transition curve length in the GB 50157—2013“Code for Design of Metro”when the maximum limit speed of the curve is taken as the maximum,most of the ultra-high time variability of the curve will exceed 40 mm/s,which will affect passenger comfort.In order to ensure passenger comfort,it is common to decrease the curve superelevation which affect the overall travelling speed.In order to solve the problem,factors analysis was adopted to comprehensively analyze the influencing factors of the value of the length of the relaxation curve,as well as the calculation principle of the ultra-high curve and the value of the relaxation curve length in the“Code for Design of Metro”.Combined with practical projects,the radius of the curves is suggested to be less than 450 m,600 m,700 m respectively for the lines with maximum speed of 80 km/h,90 km/h and 100 km/h.The length of the transition curve can be increased by 5m on the basis of“Code for Design of Metro”,so as to improve the limited speed and maximum operating speed of the small-radius curve which help improve the overall travelling speed.

关 键 词：地铁 缓和曲线 曲线超高 旅行速度 数字化 

分 类 号：U231[交通运输工程—道路与铁道工程] U212