轨道交通GNSS控制网的建立及数据分析处理  

Establishment and Data Analysis of GNSS Control Network of Rail Transit

作　　者：李谋思 刘志锋 LI Mousi;LIU Zhifeng(Wuhan Geotechnical Engineering and Surveying Co.,LTD,Wuhan 430022,China;Guangzhou Metro Design&Research Institute Co.Ltd,Guangzhou 510000,China)

机构地区：[1]武汉市勘察设计有限公司,湖北武汉430022 [2]广州地铁设计研究院股份有限公司,广东广州510010

出　　处：《河南科技》2024年第6期11-15,共5页Henan Science and Technology

摘　　要：【目的】研究城市轨道交通平面首级GNSS控制网的布设方法及数据分析处理,总结项目经验。【方法】结合城市轨道交通平面首级GNSS控制测量的规范要求及工程实际情况,以某市轨道交通四号线GNSS控制网的建立及数据处理过程为例,采用框架网、线路网的分级布设,介绍了地铁GNSS控制网的主要精度要求、测点布设原则、外业采集过程、数据处理流程、质量检验等方法。【结果】控制网布设时应与相邻线路控制网重合点进行联测;点位选取除须符合规范要求外,还应与线路走向及施工相配合,与相邻线路控制点联测,保证点位精度;数据处理过程中需特别注意同步环及异步环精度,针对长基线、车站附近控制点等重要位置应采用测量机器人进行边长观测及修正。【结论】城市轨道交通平面首级GNSS控制网的布设是一个费时费力的过程,数据分析处理对技术人员经验要求较高,该控制网测设,能够很好地满足生产要求,对类似工程具有一定的借鉴意义。[Purposes]This paper aims to study the layout method and data analysis and processing of the first level GNSS control network for urban rail transit,thus summarizing project experience.[Methods]Combined with the specification requirements of the first-level GNSS control measurement of urban rail transit plane and the actual situation of the project,and taking the establishment and data processing of the GNSS control network for Line 4 of a certain city's rail transit as an example,the hierarchical layout of the frame network and the line network is adopted.The main accuracy requirements of the subway GNSS control network,the principle of measuring point layout,the field collection process,data processing flow,quality inspection and other methods are introduced.[Findings]When laying out the control network,it is advisable to conduct joint measurement with the overlapping points of the adjacent line control network.The selection of point positions should not only comply with the requirements of the specifications,but also be coordinated with the line direction and construction,and should be connected with the adjacent line control points to ensure the accuracy of point positions;During the data processing process,special attention should be paid to the accuracy of synchronous and asynchronous loops.For important parts such as long baselines and control points near stations,measurement robots can be used for edge length observation and correction.[Conclusions]The layout of the first level GNSS control network for urban rail transit is a time-consuming and laborious process,and data analysis and processing require high experience from technical personnel.The control network measurement can well meet production requirements and has certain guiding significance for similar projects.

关 键 词：GNSS控制网布设 框架网 线路网 数据处理 轨道交通 

分 类 号：TG333[金属学及工艺—金属压力加工]