Deformation Monitoring Along Beijing Metro Line 22 Using PS-InSAR Technology

Fenze Guo, Mingyuan Lyu (), Xiaojuan Li, Jiyi Jiang, Lan Wang, Lin Guo, Ke Zhang, Huan Luo and Fengzhou Wang
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Fenze Guo: School of Earth Sciences, Institute of Disaster Prevention, Langfang 065201, China
Mingyuan Lyu: School of Earth Sciences, Institute of Disaster Prevention, Langfang 065201, China
Xiaojuan Li: College of Resources Environment and Tourism, Capital Normal University, Beijing 100048, China
Jiyi Jiang: School of Earth Sciences, Institute of Disaster Prevention, Langfang 065201, China
Lan Wang: College of Resources Environment and Tourism, Capital Normal University, Beijing 100048, China
Lin Guo: College of Resources Environment and Tourism, Capital Normal University, Beijing 100048, China
Ke Zhang: Beijing Water Science and Technology Institute, Beijing 100048, China
Huan Luo: School of Earth Sciences, Institute of Disaster Prevention, Langfang 065201, China
Fengzhou Wang: College of Mechanical Engineering, Zhejiang University, Hangzhou 310030, China

Land, 2025, vol. 14, issue 5, 1-18

Abstract: The construction of subways exacerbates the non-uniformity of surface deformation, which in turn poses a potential threat to the safe construction and stable operation of urban rail transit systems. Beijing, the city with the most extensive subway network in China, has long been affected by land subsidence. Utilizing data from Envisat ASAR, Radarsat-2, and Sentinel-1 satellites, this study employs PS-InSAR technology to monitor and analyze land subsidence within a 2 km buffer zone along Beijing Metro Line 22 over a span of 20 years (from January 2004 to November 2024). The results indicate that land subsidence at Guanzhuang Station and Yanjiao Station along Metro Line 22 is particularly pronounced, forming two distinct subsidence zones. After 2016, the overall rate of subsidence along the subway line began to stabilize, with noticeable ground rebound emerging around 2020. This study further reveals a strong correlation between land subsidence and confined groundwater levels, while geological structures and building construction also exert a significant influence on subsidence development. These findings provide a crucial scientific foundation for the formulation of effective prevention and mitigation strategies for land subsidence along urban rail transit lines.

Keywords: Beijing metro line 22; PS-InSAR; surface deformation monitoring; spatio-temporal analysis (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2025
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