摘要
针对大坝安全变形情况,本文利用GPS三频组合精密单点定位技术,对国内某大坝进行变形监测,并从定位精度、收敛时间以及大坝三维变形程度三个方面分析了精密单点定位技术在大坝变形监测中的可行性与有效性。经研究发现,在开始监测30 min之后精密单点定位开始收敛,定位精度可以达到毫米级,对收敛后的时间段数据分析发现大坝水平向和竖直向变形位移在3 mm之内,精密单点定位技术可以精确获取大坝三维变形情况,可为今后的大坝安全变形监测提供一种可靠的技术手段支撑。
Aiming at the safe deformation of the dam,this paper uses GPS tri-frequency combined precise single-point positioning technology to monitor the deformation of a dam in China,and analyzes the precise single-point positioning from three aspects:positioning accuracy,convergence time,and three-dimensional deformation of the dam.Feasibility and effectiveness of technology in dam deformation monitoring.After research,it was found that the precise single-point positioning began to converge 30 minutes after the start of monitoring,and the positioning accuracy could reach the millimeter level.Analysis of the data after the convergence showed that the horizontal and vertical deformation displacement of the dam was within 3mm,and the precise single-point The positioning technology can accurately obtain the three-dimensional deformation of the dam,and can provide a reliable technical support for future dam safety deformation monitoring.
作者
谭林
TAN Lin(Shandong Institute of Geological Surveying and Mapping,Jinan Shandong 250000,China)
出处
《北京测绘》
2020年第6期848-851,共4页
Beijing Surveying and Mapping
关键词
精密单点定位
三频
大坝
变形监测
precise single-point positioning
tri-frequency
dam
deformation monitoring
