基于PS-InSAR的京津城际铁路地面沉降监测研究

The Subsidence Monitoring Study of Beijing-Tianjin Intercity Railway Based on PS-InSAR

合成孔径雷达干涉测量技术可以大范围监测地表形变,对高速铁路运行沿线具有较好的监测能力。本文以ENVISAT ASAR数据为基础,采用PS-InSAR监测北京和天津地区的地面沉降的特征,通过临轨基准转换完成了两个区域的拼接,实现了在同一基准上的大尺度京津城际铁路沿线地面沉降的监测。通过本次研究,我们掌握了京津城际铁路沿线地面沉降的分布,以典型区域为样方分析其时间序列演化特征,并分析城际铁路不均匀地面沉降的运行风险。

SAR interferometry measurement techniques can monitor surface deformation on the large scale, especially for deformation monitoring along high- speed railway. Based on the ASAR data, we apply the permanent scatterer interferometry on monitoring land subsidence that covers Beijing and Tianjin region. We completed the splicing of two regions by multi - track datum transformation and achieved large -scale monitoring of land subsidence covering Beijing -Tianjin at the same datum. Through this experiment, we grasp the distribution of land subsidence along Beijing - Tianjin intercity railway, and a typical region was selected to analyze the time series evolution characteristics, and analyze the risk of the uneven land subsidence along the high - speed railway.