速度100 km/h以上轨道交通快线竖曲线半径取值研究

Study on the value of vertical curve radius of rail transit express line with speed exceeding 100 km/h

目前国内已颁布多部轨道交通快线方面的设计规范和标准,也有多条速度超过 100 km/h的轨道交通运营线路,但各规范、标准和各线对于竖曲线半径取值的规定及应用情况不尽相同,技术标准也未统一。文章通过对上述规范、项目在竖曲线半径技术标准方面的梳理对比,分析速度 100 km/h 以上轨道交通快线竖曲线半径计算中竖向加速度等参数的合理取值范围,计算确定速度 120~160 km/h 轨道交通快线线路设计中竖曲线的半径,并根据车站站台长度确定车站端部竖曲线半径的合理取值。

At present,many design codes and standards for rail transit express lines have been promulgated in China,and there are also many rail-transit lines with a speed exceeding 100 km/h.The specifications,standards and lines have different regulations and applications on the value of vertical curve radius,and the technical standards are not unified.By combing and comparing the technical standards of vertical curve radius in the above specifications and projects,this paper analyzes the reasonable value range of vertical acceleration and other parameters in the calculation of vertical curve radius of rail transit express lines with speed exceeding 100km/h,calculates and determines the vertical curve radius for the designs of 120~160 km/h rail transit express lines,and determines the reasonable value of vertical curve radius at stations end according to the station platform length.