PSI技术应用于防波堤沉降监测研究

黄其欢; 王青青; 何宁; 王一安; 周彦章

doi:10.11779/CJGE201904021

PSI技术应用于防波堤沉降监测研究 English Version

1. 河海大学地球科学与工程学院,江苏南京 211100;
2. 南京水利科学研究院岩土工程研究所,江苏南京 210024

详细信息

作者简介:
黄其欢(1978– )，男，安徽舒城人，副教授，从事InSAR、地表沉降监测等方面的研究工作。E-mail:insar@hhu.edu.cn。

通讯作者:
何宁，E-mail：nhe@nhri.cn

中图分类号: TU433
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出版历程
- 收稿日期: 2018-05-06
- 发布日期: 2019-04-24

Monitoring time-series settlements of breakwaters based on PSI

1. School of Earth Science and Engineering, Hohai University, Nanjing 211100, China;
2. Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, China

摘要

摘要: 防波堤工后稳定性监测是其安全运行的关键,需大量的实测数据进行分析评估,而水准测量和GPS等传统测量方法需耗费大量人力物力,且仅能提供稀疏的点状沉降数据。PSI技术通过雷达传感器和地面目标（如人工建筑物、道路和其它基础设施）之间距离变化信息,获取高密度目标点的雷达视线向形变值,转换得到垂直向位移（沉降量）,适用于监测长期发生缓慢形变的区域。以某港区东防波堤（8 km）为例,对2016年9月29日至2017年12月29日共38景Sentinel-1A卫星C波段合成孔径雷达影像处理分析,提取788个均匀分布的稳定散射体点（PS点）,并选取9个特征点分析其形变规律。结果表明,该防波堤累积沉降量达到336 mm,占堤高的0.8%,堤身安全稳定。最后将PSI监测结果与同期水准测量结果对比分析,可以发现二者具有一致性,能满足防波堤地表沉降的精度要求,表明PSI技术在同类线性工程沉降监测领域具有较大应用潜力。
- 防波堤 /
- PSI /
- 沉降监测 /
- Sentinel-1A
Abstract: The post-construction stability monitoring of breakwaters is one of the key tasks to their operation, and a large amount of measured data needs to be required for the stability and safety analysis. The traditional methods such as leveling and GPS are time consuming and labor-intensive, which only provide sparse points. The PSI technology can obtain the high-density target points and the line-of-sight (LOS) deformations through monitoring the distance changes between the radar sensor and the ground targets (such as artificial buildings, roads, and other infrastructures). PSI is suitable for monitoring the areas where long-term slow deformation occurs. Taking a breakwater (8 km) in Lianyungang as an example, a total of 38 C-band images of Sentinel-1A, from September 29, 2016 to December 29, 2017, are analyzed and 788 persistent scatterers (PS) are extracted. Nine feature points are selected to analyze the deformation pattern. The results show that the cumulative settlement of the breakwater reaches 336 mm, which accounts for 0.8% of the breakwater height, indicating that the dike is safe and stable. Finally, by comparing the PSI with the leveling during the same period, it can be found that the two monitoring results are consistent and can meet the accuracy requirements of the breakwater settlement monitoring, which performs the great potentiality in monitoring the settlement of linear engineering.
- breakwater /
- PSI /
- settlement monitoring /
- Sentinel-1A

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参考文献(21)

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