基于TS-InSAR技术的长江沿岸水闸沉降监测

doi:10.13474/j.cnki.11-2246.2025.1020

摘要/Abstract

摘要： 水闸在防灾减灾、航运交通及农业灌溉等方面发挥了重要作用。加强水闸沉降监测,确保其安全稳定运行意义重大。本文采用PS-InSAR技术对东新港闸和东夹江闸进行沉降监测,提取闸站2016—2020年的时序沉降结果,并与SBAS-InSAR方法取得的监测结果进行对比,最后对闸站沉降原因进行讨论。结果表明:2016—2020年东新港闸和东夹江闸分别以-5.0、-3.37mm/a的速率沉降;对比PS-InSAR与SBAS-InSAR方法监测结果可知,两水闸的年均形变速率差值均在2mm以内,且两种方法的时序沉降监测结果的决定系数均高于0.77,表明两种方法的监测结果一致性较高,结果较为可靠;以粉壤土为主的土壤质地类型及嘶马弯道特殊的地形特征影响水闸稳定性,地下水位与水闸水位降低导致水闸沉降量增加,高密度建筑群对土体应力产生影响,易导致水闸区域发生沉降。

关键词: 水闸, 地表沉降, 时序InSAR, Sentinel-1A

Abstract: Sluice play an important role in disaster prevention and mitigation, shipping and transportation, as well as agricultural irrigation.It is significant to strengthen the settlement monitoring of sluice to ensure their safe and stable operation.The settlement monitoring of Dongxingang sluice and Dongjiajiang sluice was carried out using PS-InSAR technology to extract the time-series settlement results of the sluices from 2016 to 2020.The results were then compared with those obtained using the SBAS-InSAR method.Finally, the causes of sluice settlement were discussed.The results indicated that Dongxingang sluice and Dongjiajiang sluice settled at a rate of -5.00 and -3.37 mm/a, respectively; By comparing the monitoring results of PS-InSAR and SBAS-InSAR, it can be seen that the annual deformation rate differences for both sluice gates are within 2 mm, and the coefficient of determination for the time-series settlement monitoring results of both methods is above 0.77, indicating a high degree of consistency and reliability between the two methods.The soil texture type dominated by powdery loam and the special topographic features of Hissing Horse Bend may affected the stability of the sluice.Decreases in groundwater levels and sluice water levels may aggravate the settlement of the sluice.Additionally, high-density urban development impacted soil stress, potentially causing settlement in the sluice area.

Key words: sluice, land subsidence, time-series InSAR, Sentinel-1A

中图分类号:

P237

王轶虹, 石一凡, 吴勇锋, 梁文广. 基于TS-InSAR技术的长江沿岸水闸沉降监测[J]. 测绘通报, 2025, 0(10): 119-126.

WANG Yihong, SHI Yifan, WU Yongfeng, LIANG Wenguang. Monitoring of sluice subsidence along the Yangtze River based on time-series InSAR technology[J]. Bulletin of Surveying and Mapping, 2025, 0(10): 119-126.

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