DInSAR 沉降监测技术在铁路勘察设计中的应用

摘要

To solve the problems of historical subsidence monitoring data deficiency and difficulty of regional subsidence survey for railway survey and design,we use differential synthetic aperture radar interferometry (DInSAR)technique to monitor the regional subsidence in the stage of railway survey and design.According to the demand of railway survey and design on the regional subsidence,both the conventional DInSAR and the small baseline subset (SBAS) techniques were utilized for monitoring the regional subsidence along the railway.The experiments were implemented in terms of different schemes.The results demonstrate that the conventional DInSAR can extract the subsidence area coverage,subsidence magnitudes and subsidence velocities.Further analysis indicates that the multi-temporal DInSAR is able to detect more accurate subsidence results,which can provide appropriate regional subsidence datum for railway planning stability.%针对当前铁路勘察设计中面临铁路沿线地表区域历史沉降监测资料缺失、调查困难的问题，该文引入了合成孔径雷达差分干涉测量（DInSAR）技术对铁路勘察设计阶段区域沉降进行监测；结合铁路勘察设计对地表区域沉降需求特点，采用常规差分 DInSAR 和小基线集（SBAS）技术方案对铁路沿线进行区域沉降监测，并基于不同方案开展了相应实验。实验表明：利用常规差分干涉测量和基于时序的差分干涉测量方法，能够有效地监测到铁路沿线的地表区域沉降范围、沉降量和沉降速率，基于时序的差分干涉测量能够提供更加准确的监测结果，为铁路方案稳定性提供准确的区域沉降资料。