地铁盾构隧道洞门环中心测量方法及应用研究

地铁盾构隧道洞门环是盾构机始发和接收的主要载体,需要精确地测定洞门环中心的三维坐标,为相关工作提供数据支撑。在工程中普遍采用的方法是在洞门环水平放置安装有管水准气泡的水准尺,采用全站仪采集其中心坐标,并利用其和洞门环的空间几何关系间接求出洞门环中心空间三维坐标。论文以青岛地铁4号线九静区间盾构始发井洞门环中心测量为例,介绍了采用全站仪实测三维坐标进行洞门环中心拟合的方法,并对两种方法的优缺点进行了比较分析,可为类似工程的测量提供有益的借鉴参考。

Research on Measurement Method of Tunnel Ring Center in Subway Shield Tunnel and Its Application

Tunnel ring of subway shield tunnel is the main carrier for shield machine to start and receive.It is necessary to accurately measure the three-dimensional coordinate of the center of the tunnel ring to provide data support for related work.The common method used in engineering is to place the leveling ruler with tubular leveling bubble on the tunnel ring,collect its central coordinates by total station,and use its spatial geometric relationship with the tunnel ring to indirectly find out the three-dimensional coordinates of the central space of the tunnel ring.Taking the measurement of tunnel ring center of shield tunnel-starting well in interval from Jiu Shui East Road Station to Jinggang Road Station of Qingdao Metro Line 4 as an example,this paper introduces the method of fitting the center of the tunnel ring by using the measured three-dimensional coordinates of the total station,and compares the advantages and disadvantages of the two methods,which can provide a useful reference for the measurement of similar projects.