整体平差在多线路地铁控制网建设的应用实证

Application of Integrated Adjustment in Construction of Urban Multi-line Subway Control Network

城市地铁控制网是为城市地铁工程布设的专用控制网,是城市地铁工程所有测量的基础依据,是城市地铁工程全线线路与结构贯通的保障。城市地铁的建设特点是网状规划、建设周期长、分期建设等。随着新建线路的增加,单地铁线路的控制网越来越多,如何保证已有线路和新线路的衔接,是城市地铁控制网设计和建设时必须考虑的问题。本文以福州市4#、6#及F1线控制网建设为例,通过将已有线路控制网纳入到新线路控制网进行整体平差,有效解决了这一衔接问题,提高了新网与已有网的契合度,使控制网精度更均匀,同时提高了新线路控制网精度。

The urban subway control network is a special control network for subway engineering,which is the basis of all the survey of urban subway engineering,and is the guarantee for the whole line and structure of urban subway engineering.The construction characteristics of urban subway are network planning,long construction period,phased construction and so on.With the increase of new lines,the subway control network of single line is more and more.How to ensure the connection between existing lines and new lines is a problem that must be considered in the design and construction of urban subway control network.Based on the construction of Fuzhou4#,6#and F1 lines control network,this paper effectively solves this problem by integrating the existing line control network into the newline control network for integrated adjustment.