激光铅垂仪向上投点在地铁隧道工程中进行联系测量的实践

盾构法地铁隧道施工测量中,提高联系测量对隧道贯通起着决定的作用。本文对地铁施工测量贯通测量的误差来源进行了分配,对二井定向利用激光铅垂仪向上投点方案进行了精度分析,并和钢丝投点法的计算成果进行了比较,提出了激光铅垂仪向上投点法方案措施。

Practice of Laser Plummet Apparatus Upward Point in Subway Tunnel Project

In the shield method of subway tunnel project measuring,improving the linkage measure technique has a decisive function on the tunnel breakthrough.By distributing the error resources in the subway project breakthrough measuring,this paper carries out the accuracy analyses of the two wells direction laser plummet apparatus upward point method,compares the calculating results of steel wire point method and finally proposes a project method of improving the laser plummet apparatus upward point method.