动静载荷作用下基于压缩感知域InSAR时间序列分析监测京津高铁沿线地面沉降

项目名称： 动静载荷作用下基于压缩感知域InSAR时间序列分析监测京津高铁沿线地面沉降

项目编号： No.41201419

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 地理学

项目作者： 陈蜜

作者单位： 首都师范大学

项目金额： 25万元

中文摘要： 城际高速铁路的安全运营对沿线地理环境和地质条件要求较为严苛，区域地面不均匀沉降、城市密集建筑群的静载荷及城际高铁动载荷等多种因素综合影响之下，会引起路基等构筑物产生变形沉降而构成风险。本课题针对京津高速铁路沿线，结合常规水准测量与GPS测量方法，以高分辨率TerraSAR-X影像为数据源，探索动静载荷作用下采用压缩感知域InSAR时序分析提取高铁沿线地面沉降时空信息的新方法，构建面向高铁监测的时变性地面沉降参数化模型，推导基于压缩感知域的干涉图集数据协方差建模分析与沉降模型稳健快速求解算法，以获取多方位、高精度的高铁沿线灾害性地面沉降位移场监测信息，为保障高速铁路安全运营提供可靠的科学依据，进而实施可行的维护手段，具有重要的理论及应用价值。

中文关键词： 地面沉降；雷达遥感；干涉合成孔径雷达；动静载荷；压缩感知

英文摘要： ???? The project of Beijing-Tianjin inter-city high speed railway plays an important role in the two major cities of China.The stability of the geological environment is important for the safe operation of the high speed railway. The uneven subsidence of foundation,combined with the static load of crowded buildings and the dynamic load from high speed train will probably cause the deformation of the roadbed, which poses significant risks to the high speed railway. It is well known that a tiny deformation of the rail will cause serious consequences. So to maintain the safety operation of the high speed railway, the continuous monitoring of land subsidence along high speed railway is very important. In this project, taking the area along the Beijing-Tianjin inter-city high speed railway as the study area, combing common approach of leveling and GPS measurement, a new method of monitoring of land subsidence along jingjin high speed railway using InSAR time series analysis under static-dynamic loading in compressive sensing field with high resolution TerraSAR-X data is explored. A general parametrization of time-dependent land subsidence along high speed railway with the aid of static-dynamic loading is constructed, the complete interferogram noise covariance is modeled and analyzed in compressive sensing field to

英文关键词： Land subsidence；Radar remote sensing；InSAR；Static-dynamic loading；Compressive sensing