合成孔径雷达干涉测量技术在城市高架桥变形监测中的应用

Application of synthetic aperture radar interferometry technology in deformation monitoring of urban viaduct

地面沉降灾害制约了社会经济的可持续发展,目前地面沉降监测广泛采取水准测量和合成孔径雷达干涉测量(InSAR)技术等方法。水准测量是监测形变的主要技术手段,精度高且应用广泛,而InSAR技术用于形变监测起步较晚,相关理论尚不成熟。文章以上海内环高架桥梁作为实例,运用InSAR技术进行沉降监测,采用K-均值聚类方法提取高架监测点,并与水准数据对比,验证了InSAR技术监测形变的可行性和可靠性。

Land subsidence disaster restricts the sustainable development of social economy.At present,leveling and InSAR technology are widely used in land subsidence monitoring.Leveling is the main technical means of monitoring deformation,with high precision and wide application,while InSAR technology for deformation monitoring started relatively late,and the relevant theory is still immature.Taking Shanghai inner ring viaduct as an example,this paper uses InSAR technology for subsidence monitoring,uses K-means clustering method to extract points of the viaduct,and compares it with leveling data to verify the feasibility and reliability of InSAR technology for monitoring deformation.