Long-term monitoring and early detection of subway construction-induced subsidence using SBAS-InSAR
This study focuses on the two subway construction-induced subsidence that occurred at Shazikou and Shengliqiao in Qingdao of China in 2019.Using an improved SBAS-InSAR technique and selecting data from 60 sets of Sentinel-1 satellite images,we captured the temporal information of surface deformation in Qingdao before and after the ground subsidence events.We investigated the correlation between the ground deformation process in the subsidence accident zones and the subsidence incidents.Furthermore,we established a method for utilizing synthetic aperture radar satellite remote sensing data to conduct monitoring and early warning of ground subsidence induced by urban subway construction.By conducting a statistical analysis and comparison of long-term sequential ground deformation monitoring data from the Shazikou and Shengliqiao incident sites,the cumulative deformation variables are transformed into daily average subsidence rates.The paper proposes indicators for the early identification of surface subsidence,where an average subsidence rate exceeds 0.02 mm/d within a single cycle(12 d),while the construction warning threshold is defined after a continuous observation of an average subsidence rate exceeding 0.02 mm/d for three cycles(36 d).
万方数据
维普
