Application of GB-InSAR in deformation monitoring of huge landslide in reservoir area
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摘要: 水电站库区特大型滑坡的稳定性对于水电站坝工结构及周边人民生命财产安全具有重要影响，对该类滑坡稳定性及变形趋势进行大范围实时精确观测可为滑坡提供可靠的预警和治理信息，具有十分重要的意义。水电站库区滑坡传统监测方法主要以GNSS监测，全站仪监测等为主，本研究将国产先进的地基干涉合成孔径雷达系统LKR-05-KU-S100，应用于澜沧江大华桥水电站沧江桥—营盘滑坡和大华滑坡的监测。现场监测试验表明，该系统精度较高，可进行远距离、全天时、全天候、大范围监测，对于大型及特大型滑坡的监测具有独特的优势和广阔的应用前景。
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关键词:
- GB-InSAR /
- 差分干涉测量 /
- 特大型滑坡 /
- 变形监测 /
- LKR-05-KU-S100
Abstract: The stability of large-scale landslide in the reservoir area of hydropower station has an important impact on the safety of dam structure and surrounding people's life and property. Large-scale real-time accurate observation of the stability and deformation trend of this type of landslide can provide reliable early warning and control information for the landslide, which is of great significance. The traditional monitoring methods of landslide in the reservoir area of hydropower station are mainly GNSS monitoring and total station monitoring. In this study, the advanced GB-InSAR system LKR-05-KU-S100 is applied to the monitoring of Cangjiangqiao-Yingpan landslide and Dahua landslide of Dahuaqiao hydropower station on Lancang River. Field monitoring tests show that the system has high precision, and it can carry out long-distance, all-day, all-weather, and large-scale monitoring. It has unique advantages and broad application prospects for the monitoring of large and super-large landslides.-
Key words:
- GB-InSAR /
- differential interferometry /
- huge landslide /
- deformation monitoring /
- LKR-05-KU-S100
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图 1 GB-InSAR系统观测几何示意图
Figure 1. Observation geometry schematic diagram of GB-InSAR system
图 5 沧江桥—营盘滑坡全貌及分区示意图
Figure 5. Cangjiangqiao—Yingpan landslide panorama and zoning diagram
图 8 沧江桥—营盘滑坡累积变形分布图
Figure 8. Cumulative deformation distribution of Cangjiangqiao—Yingpan landslide
图 12 大华滑坡累积变形分布图
Figure 12. Distribution of accumulated deformation of Dahua landslide
表 1 雷达基本参数表
Table 1. Radar basic parameter table
雷达组成 参数名称 参数取值 雷达控制单元 信号频段 Ku 信号类型 SFCW 孔径类型 合成孔径 天线 增益 18 dBi 极化方式 VV 主瓣-3 dB角宽 75°H/90°V 
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表 2 LKR-05-KU-S100系统基本参数
Table 2. Basic parameters of LKR-05-KU-S100 system
参数名称 参数取值 分辨率 距离分辨率：0.3 m 方位向：4 mrad（可定制） 监测距离/m 10～4000 监测精度/mm 0.1 工作环境/°C −25～60 软件 软件数据接口开放，界面简易，操作方便 可定制性 可实现多源数据融合
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