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本文针对某体育馆屋盖结构沉降监测的任务要求,采用了基于经纬仪或全站仪角度观测的非接触式沉降监测方法;论述了其测量原理及详细的作业过程,在论证测距误差及水平位移对沉降量计算影响可忽略不计的基础上,分析了该方法可达到的精度水平。为满足实时性监测的要求,采用Visual Basic语言编制了联机测量程序,实时记录和存储观测数据及计算成果。工程实践表明,该方法能够在水准测量无法实施的情况下,有效解决不易到达变形体的沉降监测难题。
In this paper, a method of non-contact settlement monitoring based on theodolite or total station angle observation is adopted in view of the mission requirements of settlement monitoring of the roof structure of a gymnasium. The measuring principle and detailed operation process are discussed. In the demonstration of ranging error and horizontal displacement On the basis of the negligible influence on the settlement calculation, the accuracy level achievable by this method is analyzed. In order to meet the requirement of real-time monitoring, the on-line measurement program was programmed in Visual Basic language to record and store the observed data and calculation results in real time. The engineering practice shows that this method can effectively solve the settlement monitoring problems of difficult-to-reach deformable bodies in the situation that the leveling can not be implemented.