北京测绘2025，Vol.39Issue(6)：849-854,6.DOI:10.19580/j.cnki.1007-3000.2025.06.016
变形监测基准网稳定性检验方法对比
Comparative of stability test methods of fundamental networks for deformation monitoring
摘要
Abstract
The construction site of urban engineering construction is generally small,and the deformation monitoring reference points are mostly arranged in the stable area outside the site and are prone to displacement and deformation due to external influences.In view of the disadvantages of traditional methods,such as low frequency and poor timeliness of fundamental networks in manual review,the observation data of total stations of different periods was utilized,and the mean gap method,limit difference method,and t test method were used to test the stability of the fundamental networks;the foundation pit engineering project of the subway station was taken as the experimental object,with the three methods used to test the stability of fundamental networks for the foundation pit deformation monitoring.The three test methods were compared and analyzed in combination with their working principles.The results show that the limit difference method is more efficient,but missed detection easily appears.The t test method is suitable for fundamental networks with relatively few reference points,and the application effect is not ideal when there are more moving points.The mean gap method has high reliability and can still accurately identify and locate the moving points when there are more reference points and moving points.However,the calculation is complex,and it can be combined with the automatic monitoring system to integrate the checking and analysis algorithm,so as to realize the stable,rapid,and accurate testing of the fundamental network for deformation monitoring and provide an accurate reference for the deformation monitoring of engineering projects.关键词
变形监测基准网/稳定性检验/平均间隙法/限差法/t检验法Key words
fundamental network for deformation monitoring/stability test/mean gap method/limit difference method/t test method分类
交通工程引用本文复制引用
袁勇,俞跃..变形监测基准网稳定性检验方法对比[J].北京测绘,2025,39(6):849-854,6.基金项目
重庆市科学技术局自然科学基金(CSTB2022NSCQ-MSX1615) （CSTB2022NSCQ-MSX1615）
