一种精密三角高程水中墩垂直位移监测方法  

A Precise Trigonometric Leveling Method for Bridge PierVertical Displacement Monitoring

作　　者：上官学帅 闻道秋[1] 于先文[1] SHANGGUAN Xueshuai;WEN Daoqiu;YU Xianwen(School of Transportation,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学交通学院,江苏南京211189

出　　处：《测绘与空间地理信息》2021年第9期31-35,共5页Geomatics & Spatial Information Technology

基　　金：国家自然科学基金项目(41674053,41974030)资助。

摘　　要：为提高桥梁工程垂直位移监测精度与效率,本文提出一种精密三角高程水中墩垂直位移监测方法。从三角高程测量原理出发,分析了三角高程测量误差来源与影响大小,总结了各项误差对高差测量的影响规律。针对单向三角高程测量精度较低的问题,提出采用精确测定视线高与反算大气折光系数方法减小观测误差,并在某公铁两用跨江大桥沉降监测中验证了本文方法的可行性。In order to improve the accuracy and efficiency of vertical displacement monitoring of bridge engineering,a method for monitoring vertical displacement of pier in water with precise trigonometric leveling is proposed.Based on the principle of trigonometric leveling,this paper analyzes the error sources and influences of trigonometric leveling,and summarizes the influence law of various errors on height difference measurement.In view of the low accuracy of one-way trigonometric leveling,the method of accurately measuring the line of sight height and calculating the atmospheric refraction coefficient is proposed to reduce the observation error.The feasibility of this method is verified in the settlement monitoring of a highway rail dual-purpose river crossing bridge.

关 键 词：三角高程测量 精度分析 垂直位移监测 

分 类 号：P224.2[天文地球—大地测量学与测量工程]