Settlement Monitoring and Analysis Along a High Speed Railway in Mountainous Area Based on PS InSAR Technology
In view of a mountainous high-speed railway with complex geological conditions,large topographic fluctuations and frequent geological disasters along the line,using PS InSAR technology and sentinel-1a/1b data to obtain terrain change information along the railway,based on the precise survey network results obtained from multi-phase railway GNSS horizontal control points and second-order leveling con-trol points,the time series analysis method is used to compare the land subsidence rates along the high-speed railway,this paper analyzes the prediction and early warning accuracy of various disasters affecting the safe operation of high-speed rail using SAR data.After verification,the monitoring results of GNSS combined with leveling method and InSAR settlement monitoring method have basically the same trend.The num-ber of control points with a settlement rate difference of±8mm/a accounts for 97.8％,and the relative accuracy meets the InSAR data process-ing accuracy.
万方数据
维普
