多台自动化全站仪联测系统在地铁保护监测中的实践

Application of Automatic Monitoring System Constructed by Multiple TotalStations in Metro Tunnel Deformation Monitoring

地铁保护区内大型基坑施工,对临近较长距离地铁隧道造成变形,使用多台自动化全站仪联测系统可监测该变形。实施方案是在独立工作的全站仪之间设置偏置棱镜、背靠背棱镜,偏置棱镜与设站点之间相对位置关系、背靠背的两个棱镜之间相对位置关系保持不变,此相对关系作为限制条件进行间接平差计算,从而将所有全站仪测量统一至同一坐标系下,实现多台全站仪联测。监测实例表明多台自动化全站仪联测系统稳定,能真实反映隧道变形。

Large-scale foundation pit construction in metro restricted zone impacts on long scale of the metro tunnel.The deformation of the tunnel can be surveyed by automatic monitoring system which constructed by multiple total stations.The way can make serval total stations work as a group is setting prisms between them and the positional relation of the prisms and total stations were thought to be fixed.The case of project located in metro restricted zone proved that the automatic monitoring system works well.