Deformation monitoring of Qinghai-Tibei transmission tower using high resolution time-series InSAR technology

doi:10.13474/j.cnki.11-2246.2021.0090

Abstract

Abstract: With the global climate changing and increasing of anthropogenic activity, the dynamics permafrost environment of Qinghai-Tibet Plateau (QTP) is becoming fragile. As one of the most important infrastructures in the QTP, the Qinghai-Tibet power transmission line (QTPTL) has been constructed since 2011. In some section, the stability of QTPTL has been damaged due to the harsh climate and the effect of freezing and thawing of permafrost. To ensure the safety of the QTPTL, it is necessary to monitor the deformation of QTPTL. Conventional measurement methods (GPS and levelling) have limitations of monitoring deformation of QTPTL. In this paper, structural health and stability of QTPTL are evaluated using time-series InSAR with high resolution TerraSAR-X staring spotlight mode images. The structure feature of the transmission line tower in high resolution SAR image are analyzed. Then the deformation velocity, height and thermal dilation of the QTPTL is retrieved. The results demonstrated that potential for the deformation monitoring of QTPTL using high resolution time-series InSAR.

Key words: Qinghai-Tibet Plateau, power transmission tower, InSAR, deformation, permafrost

CLC Number:

P258

FAN Peng, WANG Shuo, ZHANG Zhengjia, LIU Xiuguo, CHEN Qihao. Deformation monitoring of Qinghai-Tibei transmission tower using high resolution time-series InSAR technology[J]. Bulletin of Surveying and Mapping, 2021, 0(3): 118-122.

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