利用GPS技术进行盾构隧道下穿管涵施工水平变形跟踪监测，为盾构的推进提供水平位移参数，得到管涵受盾构隧道推进引起的水平变形规律；通过现场数据采集提出了影响GPS数据采集质量的因素；通过合理设置2个基准点，解决了测得的位移数据转换到实际需要方向上位移的问题，成功将GPS技术应用在水平位移监测中。

Where a shielddriven tunnel is constructed underneath a pipe culvert, the GPS technology is applied in the horizontal deformation monitoring so as to provide horizontal displacement parameters for the boring of the shield machine, through which the pattern of the horizontal deformation of the pipe culvert resulting from the boring of the shield machine is obtained. On basis of the insitu data collection, the factors that have impact on the data collection quality of the GPS is obtained. By means of installing two suitable benchmark points, the problem of transferring the measured displacement values into displacements in required directions is resolved. Therefore, the GPS technology has been sucessfully applied in the monitoring of the horizontal displacement.