Bulletin of Surveying and Mapping ›› 2025, Vol. 0 ›› Issue (11): 8-14.doi: 10.13474/j.cnki.11-2246.2025.1102

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Interpretation of surface deformation of UHV transmission channel and quantitative evaluation of tower damage

LI Chunyi1,2, GUO Yaxing1,3, DING Laizhong3, CUI Ximin4, ZHENG Yuesong5   

  1. 1. School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
    2. Key Laboratory of Mine Spatio-Temporal Information and Ecological Restoration, MNR, Jiaozuo 454003, China;
    3. Mineral Resources Exploration Center of Henan Geological Bureau, Zhengzhou 450000, China;
    4. China University of Mining and Technology, Beijing 100083, China;
    5. State Grid Henan Electric Power Company Economic and Technical Research Institute, Zhengzhou 450000, China
  • Received:2025-04-09 Published:2025-12-04

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Abstract: In order to detect the surface deformation under the UHV transmission channel and quantitatively evaluate the damage of the tower,this paper uses 163 Sentinel-1A remote sensing images as the data source,and uses MT-InSAR technology to understand the surface deformation of the Lingshao line and the Shanwu line UHV transmission channel crossing Sanmenxia city,Henan province.The calculation model of surface cumulative settlement at any time is constructed,and the time benchmarks of MT-InSAR and leveling monitoring data are unified.The fusion of MT-InSAR and leveling monitoring data is realized by Kriging interpolation algorithm.A surface fitting parameter model considering underground mining space is created,and the calculation parameters of surface subsidence are inverted.According to the maximum inclination index of the surface,the stability of the transmission line tower is quantitatively evaluated.The results show that MT-InSAR technology can effectively detect the abnormal surface deformation area of UHV transmission channel,and the settlement and tilt deformation of transmission tower are closely related to underground mining of coal mine.The fusion of MT-InSAR and leveling data can effectively invert the calculation parameters of surface subsidence.The LS1130 tower in the coal mining subsidence area exceeds the allowable value of the maximum tilt of the surface and needs to be reconstructed; the maximum tilt deformation of the four towers of LS1132,LS1134,SW1006 and SW1008 is between 1.45 and 2.3 mm/m,resulting in a large tilt,which should be strengthened and repaired in time ; the maximum tilt deformation of the remaining towers is below 1 mm/m.The research results can provide safety warning for transmission lines,and also provide theoretical and technical basis for the evaluation and treatment of tower damage in coal mining subsidence area.

Key words: SBAS-InSAR, power transmission channel, cooperative detection, transmission tower, quantitative evaluation

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