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<p>To evaluate the safety of the geological environment surrounding the construction sites of urban underground engineering projects, we evaluated surface subsidence along Metro Line 1 in Xuzhou, Jiangsu Province, China from January 2014 to October 2019, by applying the Interferometric Synthetic Aperture Radar (InSAR) technique to 51 and 72 images from the TerraSAR-X and Sentinel-1A satellites, respectively. The results for the TerraSAR-X monitoring period indicated a maximum surface subsidence of –11.6 mm/yr above the Line 1 section between Gongnong Road and People’s Square stations, caused by drainage of the construction site. Conversely, during the Sentinel-1A monitoring period, surface uplift, attributed to groundwater rebound after construction ceased, occurred above the same subway section, with a rate of approximately 3.1 mm/yr. Temporal analysis of surface deformation indicated “S-shaped” subsidence time series during underground construction, which we divided into three phases: the initial, active, and stable phases, followed after construction by the surface uplift caused by groundwater rebound. Finally, spatial analysis of surface subsidence with the Peck model indicated that the impact of the Gongnong Road station construction extended to approximately 600 m from the subway centerline, with a maximum subsidence of −23.5 mm and a maximum trough width of 289.5 m. This study can provide technical support for safe underground construction and engineering disaster prevention.</p>

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Investigation of Surface Settlement Caused by Subway Construction in Xuzhou, China with the InSAR Method

  • 期刊论文

  • 发表日期：

    2026年7月7日

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  • R. N. Zhao,
  • C. Chen,
  • J. F. Li,
  • H. Meng

摘要

To evaluate the safety of the geological environment surrounding the construction sites of urban underground engineering projects, we evaluated surface subsidence along Metro Line 1 in Xuzhou, Jiangsu Province, China from January 2014 to October 2019, by applying the Interferometric Synthetic Aperture Radar (InSAR) technique to 51 and 72 images from the TerraSAR-X and Sentinel-1A satellites, respectively. The results for the TerraSAR-X monitoring period indicated a maximum surface subsidence of –11.6 mm/yr above the Line 1 section between Gongnong Road and People’s Square stations, caused by drainage of the construction site. Conversely, during the Sentinel-1A monitoring period, surface uplift, attributed to groundwater rebound after construction ceased, occurred above the same subway section, with a rate of approximately 3.1 mm/yr. Temporal analysis of surface deformation indicated “S-shaped” subsidence time series during underground construction, which we divided into three phases: the initial, active, and stable phases, followed after construction by the surface uplift caused by groundwater rebound. Finally, spatial analysis of surface subsidence with the Peck model indicated that the impact of the Gongnong Road station construction extended to approximately 600 m from the subway centerline, with a maximum subsidence of −23.5 mm and a maximum trough width of 289.5 m. This study can provide technical support for safe underground construction and engineering disaster prevention.