摘要
为了有效区分、判别变形监测基准网复测计算时各网点点位差异成因,通常采用2种及以上的检验方法,相互佐证,以削弱模型误差。在确认观测值可靠、平差基准统一的前提下,针对无法采用t检验法和(或)平均间隙法检验点位稳定性的情形,提出使用限差检验法结合地理时空特征进行变形监测基准网点平面位移综合分析的方法。以工程实例进行剖析,从初步判断4个网点不稳定。经逐步分析,最终判定其中2个点发生了真实位移。结果表明,所提方法简单实用、易于理解掌握,得出的各网点稳定性综合分析结论符合客观规律、逼近真实,对今后同类工作具有借鉴意义。
In order to effectively distinguish the causes of differences in the location of each network point during the remeasurement calculation of the deformation monitoring benchmark network,two or more testing methods are usually used to mutually support each other and weaken model errors.On the premise of confirming the reliability of observation data and the uniformity of adjustment benchmarks,we proposed a method of using the limit test method combined with geographical spatio-temporal characteristics to comprehensively analyze the plane displacement of deformation monitoring benchmark network points for situations where t-test and/or average gap method couldn’t be used to test the stability of point locations.Using engineering examples for analysis,it was initially determined that four network points were unstable.After gradual analysis,it was ultimately determined that two of the points had experienced real displacement.The results show that the proposed method is simple,practical,and easy to understand and master.The comprehensive analysis conclusions of network point stability are in line with objective rules and approximate reality,which has reference significance for similar work in the future.
作者
苏秀永
徐卫红
陈昌耀
SU Xiuyong;XU Weihong;CHEN Changyao(Zhejiang Huadong Mapping and Engineering Safety Technology Co.,Ltd.,Hangzhou 310014,China;PowerChina Huadong Engineering Co.,Ltd.,Hangzhou 311122,China)
出处
《地理空间信息》
2025年第12期33-36,共4页
Geospatial Information
基金
中国电建集团华东勘测设计研究院重大科技计划资助项目(KY2021-ZD-03)。
关键词
变形监测基准网
平均间隙法
t检验法
限差检验法
地理时空特征
平面位移
deformation monitoring benchmark network
average gap method
t-test method
limit test method
geographical spatio-temporal characteristic
plane displacement
