现场对隧道周边位移收敛值、拱顶下沉值和地表下沉值进行监测。

Furthermore, peripheral displacement convergence and settlement of vault and ground surface are monitored on-site.

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并以其中电子经纬仪虚拟照片法观测隧道周边位移为例，分析了系统的原理、使用方法及其精度。

Using electron theodolite dummy photograph observing tunnel border displacement, as the example, the authors analyse the principle, means and precision of the system.

youdao

并以其中电子经纬仪虚拟照片法观测隧道周边位移为例，分析了系统的原理、使用方法及其精度。

Using electron theodolite dummy photograph observing tunnel border displacement, as the example, the authors analyse the principle, means and precision of the system.

youdao