摘要
大坝变形监测是大坝安全监测的一项重要内容。该文详细阐述了运用基于地基SAR的IBIS-L系统测量微小形变的基本理论,简明论述了PS-In SAR技术及其优势。以湖北隔河岩大坝采集的60幅地基SAR影像作为实验研究对象,提出一种基于热信噪比、估计信噪比、相干系数、相位稳定性四个参数的PS点选取方法。运用PS法在坝体上选取了18个特征点,通过对特征点视线向位移随时间变化情况进行分析,得出坝体结构稳定的结论,通过实例验证了IBIS-L系统在大坝位移监测领域的广阔前景。
The Dam introduces the basic detailly. It describes deformation monitoring is an important content in dam safety monitoring. This paper principle of measuring Small deformation by using IBIS-L system based on GB-SAR the principle and advantages of PS-InSAR technology simply. Taking the 60 pieces of GB-SAR images collected from Geheyan dam Hubei province as the research objects, this paper put out PS point selection method based on four parameters such as thermal singal to noise ratio, estimated to noise ratio ,temporal coherence and phase stability. Using the PS method, 18 feature points on dam are selected. By analyzing the displacement in line of sight of feature points, we can obtain the colusion of dam structure stability. Through the practice providing, the IBIS-L system has widely useful in dam displacement monitoring area.
出处
《勘察科学技术》
2016年第1期18-22,共5页
Site Investigation Science and Technology
关键词
地基SAR
PS-INSAR
变形监测
隔河岩大坝
ground-based synthetic aperture radar （GB-SAR）
PS-InSAR
deformation monitoring
Ge- heyan dam
