Application of High-resolution PS-InSAR in Deformation Characteristics Probe of Urban Rail Transit

doi:10.11947/j.AGCS.2016.20150440

Abstract

Abstract: In order to make sure the security and sustainable development of the urban rail transit, the PS-InSAR technology is introduced into the deformation monitoring of urban rail transit. Taking Shanghai as an example, it is analyzed that the characteristics of surface deformation along the rail transit. Firstly, 26 TerraSAR-X images are used to carry out the high-resolution PS-InSAR subsidence fine measurements in Shanghai for the overall land subsiding characteristics of rail transit. Then, the detail subsidence pattern and the driving force is discussed by classified the rail transit with different construction periods and building modes. Finally, the accuracy of the results is verified by leveling in the same period. The results show that rapid urbanization construction has become a main reason for the subsidence of Shanghai rail transit. Rail transit with different construction periods and building modes show various deformation characteristics. Earlier sections are more stable than later sections and elevated sections have smaller subsidence rate than underground sections. The verification results show fairly consistent agreement. The results further illustrate that it is feasible to use the high-resolution PS-InSAR technology into the deformation monitoring, management, maintenance and early warning of urban public transportation projects. It can also provide decision support for planning and construction of urban public transportation.

Key words: subsidence monitoring, PS-InSAR, urban rail transit, high resolution

CLC Number:

P237

QIN Xiaoqiong, YANG Mengshi, WANG Hanmei, YANG Tianliang, LIN Jinxin, LIAO Mingsheng. Application of High-resolution PS-InSAR in Deformation Characteristics Probe of Urban Rail Transit[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(6): 713-721.

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