Surface Deformation of High-Speed Railway Between Changchun and Harbin Based on Time-Series Insar Techinque

The high-speed railway from Harbin to Dalian was plays an important role for the development of the Harbin-Changchun megalopolis. In this paper, based on sentinel-1A /B data from 2016 to 2019, the surface deformation of the highspeed railway from Changchun to Harbin were firstly evaluated using time-series ps-insar method. The results indicate that the surface deformation is not dangerous for the safe operation of the railway. Moreover, the surface depressions near Dehuixi station and Zhuchengzi town are potentially dangerous for the safe of the railway. finally, the cause of the surface deformation along the railway is mainly attributed to the human activity and the seasonal subgrade frost heave in the seasonal frozen soil.