摘要
传统大坝变形监测手段虽然精度高,但监测成本同样较高,且其点状的监测结果无法反映大坝的整体情况,而InSAR技术很好地弥补了传统监测手段的局限性。文章利用36景Sentinel-1A升轨雷达影像以及SBAS-InSAR方法监测夹岩水库大坝变形,分析变形产生的原因,并与现场监测数据进行对比。结果表明,形变信号主要分布在大坝中上部,且大坝变形主要与混凝土填筑有关,形变速率最大区域位于大坝上部,高达-56 mm/yr。与现场监测结果进行对比,差值的均方根误差为±5.1 mm,证明SBAS-InSAR技术监测大坝的变形具有可靠性。
Although traditional dam deformation monitoring methods have high accuracy,the monitoring cost is also considerably high,and their point-like monitoring results cannot reflect the overall condition of the dam.InSAR technology can well make up for the limitations of traditional monitoring methods.This paper uses 36 view Sentinel-1A ascending orbit radar image and the SBAS-InSAR method to monitor the deformation of the Jiayan Reservoir Dam,analyzes the causes of the deformation,and compares it with on-site monitoring data.The results show that the deformation signal is mainly distributed in the middle and upper part of the dam.The deformation of the dam is mainly related to concrete filling.The maximum deformation rate area is located in the upper part of the dam,with the maximum rate reaching-56 mm/yr.Compared with the on-site monitoring results,the root mean square error of the difference is±5.1 mm,which proves the feasibility of SBAS-InSAR technology to monitor the deformation of the dam.
作者
管允粽
Guan Yunzong(GuiZhou Water&Power Survey-Design Institute Co.,Ltd.,Guiyang 550002,China)
出处
《吉林水利》
2024年第9期41-44,共4页
Jilin Water Resources
基金
贵州省水利科技项目(夹岩水利枢纽及黔西北供水工程数字孪生建设关键技术研究),编号:KT202211。
