全站仪三维自由设站隧道非接触监控量测原理及精度分析

传统的隧道监控量测方法效率低,受人工、环境因素影响较大,为能快速、准确地完成隧道监控量测工作,本文提出基于全站仪三维自由设站的非接触隧道监控量测方法,同时推导了全站仪三维自由设站点和监测点的坐标计算、收敛值计算及精度评定的数学模型,在此基础上进行观测实验并对实验数据进行分析比较。研究和实验结果表明,该方法能够在隧道施工环境下实施,监测精度能够满足规范的要求,具有一次测量完成多个监测项目的优势,适合在隧道监控量测中应用。

The principle and accuracy analysis of non-contact monitoring for tunnel based on free station of total station

Because traditional tunnel monitoring methods are of low efficiency and badly affected by human and environmental factors, for taking a quick and accurate completion of tunnel monitoring work, this paper puts forward a method of non-contact monitoring based on three-dimensional free station of total station. Meanwhile, a mathematical model is derived, with which the coordinates of the three-dimensional station point and monitoring points can be calculated, and the value of convergence and the precision can be obtained. On this basis, experimental observations are carried out and analyzed. The results show that this method can be implemented in the tunnel construction environment and the precision satisfies the requirement of relative regulations. It has the advantage of completes several monitoring projects at the same time, and is suitable for application in monitoring for tunnels.