铁道标准设计2024，Vol.68Issue(8)：58-64,85,8.DOI:10.13238/j.issn.1004-2954.202403070001
基于改进SBAS-InSAR技术的西南山区铁路沿线地表形变监测方法研究
Research on Surface Deformation Monitoring Method Along the Southwest Mountain Railway Based on Improved SBAS-InSAR Technology
摘要
Abstract
Interferometric Synthetic Aperture Radar(InSAR)is a novel method of ground observation,which is widely used in fields such as surface deformation monitoring due to the fact that it is unrestricted of day and night,as well as cloud and rain.However,due to measurement errors,InSAR technology still has some limitations,especially in the densely vegetated southwest mountainous areas.Time series InSAR,such as SBAS-InSAR receives insufficient observation points,making it difficult to carry out deformation monitoring in mountainous areas.In response to the above issues,this paper considers the atmospheric characteristics of the southwest mountainous areas and designs an improved SBAS-InSAR method to optimize the interferometric phase.The Lijiang-Shangrila Railway is an electrified railway connecting Lijiang City and Shangri-La in Diqing Tibetan Autonomous Prefecture in Yunnan Province.It is an important component of the Yunnan Tibet Railway in the Western Railway Network.In order to ensure the safety and stability of the Lijiang-Shangrila Railway and verify the availability of the above method,this paper takes a certain section along the Lijiang-Shangrila Railway as the experimental area,uses archived SAR data to estimate historical surface deformation,calculates the historical time series deformation of the target area for nearly six and a half years(May 16,2015 to December 10,2021),and analyzes their influence range,deformation factors,change patterns,and other information.Finally,the improved SBAS InSAR method proposed in this article is compared with conventional InSAR method,which fully demonstrates the superiority of the proposed method.关键词
山区铁路/地表形变监测/SBAS-InSAR/雷达差分干涉测量/相位估计优化/变形分析Key words
mountain railway/surface deformation monitoring/SBAS-InSAR/differential SAR interferometry/phase estimation optimization/deformation analysis分类
交通工程引用本文复制引用
高永琪,胡亚..基于改进SBAS-InSAR技术的西南山区铁路沿线地表形变监测方法研究[J].铁道标准设计,2024,68(8):58-64,85,8.基金项目
四川省重点研发计划项目(2022YFS0533) （2022YFS0533）
