全站仪免棱镜测量技术在滑坡变形监测中的应用

Application of reflectorless total station measure technique in landslide deformation monitoring

三峡库区地形复杂,滑坡众多,地质灾害频发。若能把全站仪免棱镜测量技术应用于库区地质灾害监测,将会大大降低使用全站仪开展监测的工作量,提高工作效率。文章简要介绍了全站仪免棱镜测量的基本原理和应用现状。在总结前人经验基础上,针对免棱镜测距基线短,误差较大的局限性,结合三峡库区地质灾害监测的具体要求,对测量方法进行了改进,提出了反射膜测量法。本文介绍了有关的实验,以及在三峡工程万州库区实际监测工作中持续半年的应用情况与获得的成果。最后,对反射膜测量法与常规有棱镜测量进行的对比观测做了初步分析。

The Three Gorges Reservoir region is characterized with complicated landforms,clustered landslides and frequently disasters.But the application of reflectorless total station would efficiently reduce the difficulty and workload of geological disaster monitoring in the region.The article introduced the principle and application of this technol-ogy.On the basis of previous experiences,combined with the specific requirements of monitoring of geological disasters in Three Gorges reservoir area,a total station reflecting film measurement method was put forward in order to extend the measurement range and improve the accuracy of reflectorless total station distance measurement.This article illustrated the relevant experiments and measurement results for six-month field work of deformation monitoring in Wanzhou district,Chongqing city.Finally,a comparative analysis of reflecting film measurements and the reflector ones was presented.