Spatio-temporal analysis of surface subsidence along the Jinan subway line based on SBAS-InSAR technology

doi:10.13474/j.cnki.11-2246.2025.0418

Abstract

Abstract: In the process of construction and operation of Jinan subway, there are different degrees of subsidence, and it is of great significance to carry out subsidence monitoring in Jinan subway and its surroundings to ensure urban safety. In this paper, the deformation information of Jinan subway Lines 1, 2, and 3 is obtained by using SBAS-InSAR technology from 30 Sentinel-1A image data from March 2022 to April 2024. Combined with the Peck formula, the obtained results are modeled, and the variation characteristics of the settlement trough are explored. The results show that there are different degrees of deformation along the Jinan rail transit, and spatially, the subway in the eastern and central regions is relatively stable, and Line 1 is the most stable. The settlement near Yaoqiang airport station is the largest, with a maximum average annual deformation rate of -66 mm/a. In terms of time, the settlement during the construction of the subway is greater than that during the operation, and the settlement of the settlement trough near Yufuhe station, Lishan road station, Chuanliu station and Yaoqiang airport station in the center shows a gradual increasing trend. The radii of the settlement trough are 174, 151, 171 and 350 m, respectively.

Key words: Jinan subway, land subsidence, SBAS-InSAR, Peck formula

CLC Number:

P258

ZHOU Tianxiang, DONG Jinglong, SHEN Qiang. Spatio-temporal analysis of surface subsidence along the Jinan subway line based on SBAS-InSAR technology[J]. Bulletin of Surveying and Mapping, 2025, 0(4): 109-113.

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