Application of Multi-temporal InSAR in Deformation Monitoring of Urban Subway Construction Area

doi:10.13474/j.cnki.11-2246.2017.0258

Abstract

Abstract: It has been showed that subway construction will cause deformation of urban surface. The traditional differential interferometric synthetic aperture radar (D-InSAR), however, can hardly achieve a precise monitoring in urban subway construction area. Adopting TerraSAR-X high resolution data, the ground deformation of the eastern part of Xuzhou Metro Line 1 is monitored by using PS-InSAR and SBAS-InSAR methods, and the multi-temporal diagram of deformation from June 15, 2016 to September 11, 2016 is obtained in this paper. By a comparison with the data from level measurement which using artificial corner reflector site to validate, it is found that the surface deformation results obtained by the two InSAR measurements are consistent with the leveling results greatly, and the deformation errors are within 1 mm; while the sensibility of SBAS-InSAR to detect surface deformation is lower than that of PS-InSAR. The result shows that monitoring urban underground deformation with high resolution SAR images has sub-millimeter accuracy and meter-level positioning ability. At the same time, it provides an intense certification for a broad prospects of the application of multi-temporal InSAR technology in the deformation monitoring of urban subway project.

Key words: ground deformation, multi-temporal InSAR, artificial corner reflector, fine monitor, subway construction

CLC Number:

P258

GUO Shanchuan, HOU Huping, ZHANG Shaoliang, MI Jiaxin, SHANG Zhimin. Application of Multi-temporal InSAR in Deformation Monitoring of Urban Subway Construction Area[J]. 测绘通报, 2017, 0(8): 92-99.

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