一种新的运营线路纵断面线形调整方法  

A New Method of Making Adjustment Scheme for Vertical Alignment in Operating Railway Lines

作　　者：陶佳元 TAO Jiayuan(China Railway Shanghai Design Institute Group Co.Ltd.,Shanghai 200070,China)

机构地区：[1]中铁上海设计院集团有限公司,上海200070

出　　处：《铁道建筑技术》2022年第4期1-4,51,共5页Railway Construction Technology

基　　金：中铁上海设计院集团有限公司科研课题项目(集18-08)。

摘　　要：针对运营线路无砟轨道纵断面出现较大偏差的情况,本文提出一种新的纵断面线形调整方法。该方法基于三次样条插值原理,将可调整量作为控制参数,并通过不断迭代设置“基准节点”方式调整线路纵断面。对某铁路区间纵断面开展应用实践,结果表明:调整后各平顺性指标均满足规范要求,300 m弦长指标改善效果明显;调整后线路纵断面曲率呈线性变化;仿真计算得到的各项动力学响应在调整后均有所减小。研究认为应用三次样条插值法对运营线路纵断面线形进行调整,能够快速有效地制定调整方案。To solve the problem that there is deviation with large amplitude in vertical alignment of ballastless track in operating railway lines,a new method of making adjustment scheme based on cubic spline interpolation was proposed in this paper.The key step was to set up reference nodes iteratively and feasible adjustment of nodes was regarded as control parameter in the method.An adjustment scheme was made for the vertical alignment of a railway section as a practice case.The results show that different indexes of regularity meet the requirements of the specification and there is a striking improvement in the index of 300-metre-long chord;the railway vertical curvature becomes linear after adjustment;vehicle-track system dynamic responses obtained by simulation are decreased after adjustment.This paper concludes that the method based on cubic spline interpolation is effective in making adjustment scheme for vertical alignment in operating railway lines.

关 键 词：纵断面线形调整 三次样条插值 高速铁路 运营线路 无砟轨道 

分 类 号：U216[交通运输工程—道路与铁道工程] U213.244