Application of time series InSAR technology in deformation monitoring along the subway

doi:10.13474/j.cnki.11-2246.2024.0419

Abstract

Abstract: Time series InSAR technology is an effective means to monitor surface deformation. Based on 179 Sentinel-1A image data,PS-InSAR technology is used to monitor and analyze the surface deformation along the Cishousi station to Lucheng station of Beijing subway Line 6,and the typical settlement interval is analyzed in detail. At the same time,the monitoring results are compared and analyzed and the accuracy is evaluated by using the ground level data.At the same time,the accuracy of monitoring results is evaluated using ground leveling data. The results show that there are different degrees of settlement along Beijing subway Line 6,and the average annual settlement rate is different from west to east. The average annual settlement rate in the west of Jintailu station is small,but it increases rapidly from Jintailu station to east,and the maximum average annual settlement rate is -32 mm/a. The tilt value to the east of Jintailu station is large,and the tilt value fluctuates obviously,which leads to uneven settlement.There is a strong correlation between leveling results and PS-InSAR monitoring results. The average error between them is 3.5 mm and the median error is 4.7 mm,which shows that PS-InSAR has certain reliability and accuracy.

Key words: surface subsidence, PS-InSAR, time series analysis, subway

CLC Number:

P258

GAO Peng, GENG Changliang, LI Peng, XIONG Qizhi. Application of time series InSAR technology in deformation monitoring along the subway[J]. Bulletin of Surveying and Mapping, 2024, 0(4): 112-118.

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