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    利用Multi-InSAR技术对雄县地区及主要交通线路的沉降监测及分析

    Monitoring and analysis of land subsidence in the Xiongxian area and along its major traffic routes using multiple InSAR techniques

    • 摘要: 干涉合成孔径雷达(interferometric synthetic aperture Radar,InSAR)测量技术可为城市及其重要交通设施的安全提供重要的形变信息,但目前多数研究所采用的技术较为单一。该文基于斯坦福永久散射体InSAR技术(Stanford method for persistent scatterer InSAR,StaMPS-InSAR)、短基线集InSAR技术(small baseline subset InSAR,SBAS-InSAR)和分布式散射体InSAR技术(distributed scatterer InSAR,DS-InSAR)3种时序InSAR技术,利用2020年12月—2022年12月的Sentinel-1升轨数据,对雄县地区及主要铁路公路交通设施的形变特征进行提取。研究结果表明: 3种方法获取的沉降区域基本一致,主要分布在大营镇、张六庄镇、马庄镇及霸州市的辛庄村,3种方法的最大沉降速率分别为-70 mm/a,-72 mm/a和-67 mm/a; DS-InSAR技术在铁路和公路形变监测上具有显著优势,在研究区内霸徐铁路、京九铁路、津雄高速、大广高速4个路段获取到的相干点数量,分别是StaMPS-InSAR技术的1.62倍、4.28倍、2.34倍和4.22倍,分别是SBAS-InSAR技术的4.27倍、5.63倍、1.30倍和4.53倍。该研究为时序InSAR技术应用于城市及其交通线路的形变监测、地面沉降灾害防控等方面提供了一定技术参考。

       

      Abstract: The InSAR technology can provide key deformation information for ensuring the safety of cities and their critical traffic infrastructure. However, most relevant studies have focused on individual InSAR techniques. In this study, combining three time-series InSAR techniques, including StaMPS-InSAR, SBAS-InSAR, and DS-InSAR, the deformation characteristics of the Xiongxian area and its major railway and highway infrastructure were extracted from the Sentinel-1 ascending orbit data from December 2020 to December 2022. The results show that the subsidence zones determined by the three techniques were roughly consistent. They were primarily distributed in Daying Town, Zhangliuzhuang Town, Mazhuang Town, and Xinzhuang Village of Bazhou City, with the maximum subsidence rates of -70 mm/a, -72 mm/a, and -67 mm/a, respectively. The DS-InSAR technique significantly outperformed the other two techniques in monitoring the deformation of railways and highways. Along the Bazhou-Xushui Railway, Beijing-Kowloon Railway, Tianjin-Xiong'an Expressway, and Daqing-Guangzhou Expressway within the study area, the number of coherent points obtained using the DS-InSAR technique is 1.62, 4.28, 2.34, and 4.22 times that obtained using the StaMPS-InSAR technique, and 4.27, 5.63, 1.30, and 4.53 times that obtained using the SBAS-InSAR technique, respectively. Overall, this study provides a technical reference for the application of time-series InSAR technology in the deformation monitoring of cities and their traffic routes, as well as the prevention and control of land subsidence in the study area.

       

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