摘要
针对测量坐标系构建引起的铁路设计线路不平顺问题,在分析铁路测量坐标系构建对铁路设计线路平顺性的影响机理基础上,提出设计线路衔接平顺性模拟分析算法,实现了在设计阶段对铁路设计线路换带衔接偏差和平顺性的计算分析。理论分析和实验结果均表明:以分带投影方式构建铁路测量坐标系时,仅控制单个投影带在边缘处的投影长度变形大小,无法避免设计线路在换带连接处出现横向衔接偏差,进而可能导致设计线路出现不平顺;要使得设计线路换带衔接不平顺对铁路轨道静态铺设平顺性的影响可以忽略不计,算例中的高速铁路和160 km/h快速铁路,应控制高速铁路设计线路10 m、5 m/30 m和150 m/300 m弦轨向不平顺分别不大于0.64、0.64和3.2 mm,快速铁路无砟轨道、有砟轨道10 m弦轨向不平顺分别不大于0.64和1.28 mm;提出的铁路设计线路衔接平顺性分析算法,可以在设计阶段计算分带投影引起的设计线路不平顺性,进而可以对坐标系构建的合理性作出科学评判。
The design of railway track irregularities,one of the factors causing railway track irregularities,is mainly severely affected by line parameters and measurement coordinate systems.On the basis of analyzing the impact mechanism of railway measurement coordinate system construction on the smoothness of railway design lines,this article proposes a simulation analysis algorithm for the smoothness of design line connection,which realizes the calculation and analysis of the deviation and smoothness of railway design line switching connection during the design phase.Theoretical analysis and experimental results both indicate that when constructing a railway measurement coordinate system using a strip projection method,only controlling the deformation of the projection length of a single projection strip at the edge cannot avoid horizontal connection deviation of the design line at the strip changing connection,which may lead to unevenness of the design line;To ensure that the impact of unevenness in the design of track replacement and connection on the static laying smoothness of railway tracks can be ignored,for the high-speed railway and 16o km/h high-speed railway in the calculation example,the chord rail irregularities of the high-speed railway design lines at 10 m,5 m/30 m,and 150 m/300 m should be controlled to be no more than 0.64 mm,0.64 mm,and 3.2 mm,respectively,and the chord rail irregularities of the ballastless and ballasted tracks at 10 m should be no more than O.64 mm and 1.28 mm,respectively;The proposed algorithm for analyzing the smoothness of railway design line connections can calculate the unevenness of the design line caused by strip projection during the design phase,and thus make scientific judgments on the rationality of coordinate system construction.
作者
闫广峰
岑敏仪
陈云峰
YAN Guangfeng;CEN Minyi;CHEN Yunfeng(School of Geography&Resources Science,Neijiang Normal University,Neijiang,Sichuan 641l00,China;Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;Maintenance Department,China Railway Lanzhou Group Co.,Ltd.,Lanzhou 730000,China)
出处
《测绘科学》
CSCD
北大核心
2024年第3期158-167,共10页
Science of Surveying and Mapping
基金
中国铁路兰州局集团有限公司科技研究开发计划项目(LZJKY2023033-1)
中国博士后科学基金资助项目(2019M663555)
内江师范学院科研资助项目(2021YB37,2023ZD05)。
关键词
分带投影
高斯投影变形
横向衔接偏差
设计线路不平顺
zonal projection
Gauss projection deformation
lateral connection deviation
design lineirregularity
