免棱镜全站仪监测系统在机场滑行道变形观测中的应用研究

Application of Prism Free Total Station in Airport Taxiway Subside Monitoring

盾构施工下穿浦东机场滑行道,人工监测无法在机场滑行道正常开展,由于滑行道变形的敏感性,需实时进行沉降监测。为了解决上述技术难题,本文采用免棱镜全站仪自动化监测的方式,引入多重实时差分技术及建立小区域测量单元的方法,构建全站仪自动化监测系统,实现了机场滑行道无接触高精度自动化监测。根据监测数据,自动化监测数值波动幅度较人工监测略大,精度相当,最大误差在0.5 mm以内,平均误差在0.2 mm左右,能满足工程应用的需求。

In order to solve the problem of settlement monitoring in Pudong airport’s shield construction under the taxiway, it is impossible to build the monitoring points manually, due to the sensitivity of taxiway deformation, settlement monitoring needs to be carried out in real time. In this paper, in order to solve the above technical problems, a method of automatic monitoring of the prism free total station is proposed. In the process of data processing, multi real time difference technique and method of establishing small area measurement unit are introduced to ensure the accuracy of automatic monitoring, and the automatic monitoring platform of total station is constructed to realize real-time monitoring. The results of automatic monitoring and manual monitoring are compared and analyzed. The results show that the fluctuation range of automatic non-contact monitoring results is more obvious than that of artificial results, but the accuracy is equal, the maximum error is within 0.5 mm and the average error is about 0.2 mm, which can meet the needs of engineering application.