基于点线一致的既有铁路线路纵断面自动重构方法  

Automatic recreating vertical alignment of existing railway based on points-alignment consistency

作　　者：李伟[1,2] 周雨 王杰 梁家轩 彭先宝 蒲浩[1,2] LI Wei;ZHOU Yu;WANG Jie;LIANG Jiaxuan;PENG Xianbao;PU Hao(School of Civil Engineering,Central South University,Changsha 410075,China;National Engineering Laboratory for High Speed Railway Construction,Changsha 410075,China;State key Laboratory of Rail Transit Engineering Information(CFSDI),Xi’an 710043,China;China Railway Siyuan Survey&Design Group Co,Ltd,Wuhan 430063,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]高速铁路建造技术国家工程实验室,湖南长沙410075 [3]轨道交通工程信息化国家重点实验室(中铁一院),陕西西安710043 [4]中铁第四勘察设计院集团有限公司,湖北武汉430063

出　　处：《铁道科学与工程学报》2019年第11期2684-2691,共8页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51608543,51778640);湖南省自然科学基金资助项目(2017JJ3382)

摘　　要：既有铁路经过长期运营,纵断面线形不可避免偏离原设计线位,必须定期重构出调整量最小且满足约束的线位,以保证列车安全运行。纵断面线形由一系列直线和竖曲线线元顺次光滑连接而成,重构关键在于准确识别每个测点归属的线元,并顾及约束进行拟合。本文提出测点归属应与重构线元完全相符的“点线一致”思想,据此构建纵断面自动重构方法。根据二阶差商初步完成测点归属识别,分别拟合对应线元,根据线元范围反向调整测点归属,迭代上述过程直至点线一致,并在迭代中处理各类约束。基于该方法研发的软件已在两千多公里既有线纵断面重构中应用,实例表明该方法可准确识别测点归属,自动生成满足约束、抬落道量显著优于既有方法的重构线形。After a long period of operation,the vertical alignment of an existing railway inevitably deviates from the originally designed centerline.It is important for calibrating track to ensure safety and comfort.The vertical alignment consists of tangents and curves,which are connected smoothly.The key of recreation is identifying the attribution of each measured point and fitting the geometric elements considering constraints.Based on points-alignment consistency that the attributions of measured points to geometric elements should be consistent with the ranges of recreated geometric elements,a method was proposed to recreate vertical alignment automatically.After the initial identification of the points attribution using second divided difference,the corresponding geometric elements were fitted.Then the attribution of points was adjusted according to the range of geometric elements.These above processes were iterated until the points and geometric elements were consistent,meanwhile,various constraints were considered.A software system developed based on this method has been applied in the recreation of more than 2000 km of existing railways.Applications demonstrate that this method can identify all geometric elements automatically and generate a recreated alignment while satisfying all the applicable constraints.

关 键 词：既有铁路 线路纵断面 点线一致 自动重构 

分 类 号：U212.34[交通运输工程—道路与铁道工程]