Using Ground Radar Interferometry for Precise Determining of Deformation and Vertical Deflection of Structures

World Multidisciplinary Earth Sciences Symposium 2017

Talich, Milan^1

Institute of Information Theory and Automation of the CAS, Pod Vodárenskou ví 4, Prague 8

CZ-182 08, Czech Republic^1

关键词: Ground based radar;    High rise building;    Horizontal movements;    Horizontal vibration;    Interferometric radars;    Radar interferometry;    Structural objects;    Vertical deflections;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/95/3/032021/pdf
DOI  :  10.1088/1755-1315/95/3/032021

来源: IOP

【 摘 要 】

The paper describes possibilities of the relatively new technics - ground based radar interferometry for precise determining of deformation of structures. Special focus on the vertical deflection of bridge structures and on the horizontal movements of high-rise buildings and structural objects is presented. The technology of ground based radar interferometry can be used in practice to the contactless determination of deformations of structures with accuracy up to 0.01 mm in real time. It is also possible in real time to capture oscillations of the object with a frequency up to 50 Hz. Deformations can be determined simultaneously in multiple places of the object, for example a bridge structure at points distributed on the bridge deck at intervals of one or more meters. This allows to obtain both overall and detailed information about the properties of the structure during the dynamic load and monitoring the impact of movements either individual vehicles or groups. In the case of high-rise buildings, it is possible to monitor the horizontal vibration of the whole object at its different height levels. It is possible to detect and determine the compound oscillations that occur in some types of buildings. Then prevent any damage or even disasters in these objects. In addition to the necessary theory basic principles of using radar interferometry for determining of deformation of structures are given. Practical examples of determining deformation of bridge structures, water towers reservoirs, factory chimneys and wind power plants are also given. The IBIS-S interferometric radar of the Italian IDS manufacturer was used for the measurements.