测绘通报 ›› 2018, Vol. 0 ›› Issue (2): 120-125,141.doi: 10.13474/j.cnki.11-2246.2018.0057

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Subsidence Monitoring for Expressway Network in Beijing Based on Time-series InSAR Technique

LIU Bing1,2, ZHANG Yonghong2, WU Hongan2, KANG Yonghui2, JIANG Decai2   

  1. 1. Shandong University of Science and Technology, Qingdao 266590, China;
    2. Chinese Academy of Surveying and Mapping, Beijing 100830, China
  • Received:2017-05-08 Online:2018-02-25 Published:2018-03-06

Abstract:

In this paper,the ground deformation of the Beijing urban areas from 2011 to 2015 was obtained by using Multiple images Coherent Targets Small Baselines InSAR (MCTSB-InSAR)technique,with the high resolution TerraSAR-X images.By building spatial buffer,the subsidence of 12 freeways and one expressway in Beijing was extracted and analyzed.The roughness of the airport second freeway was analyzed based on the subsidence of the freeways.The monitoring results were verified with leveling data and the accuracy is 4.6 mm/a.Results demonstrated that MCTSB-InSAR technique can not only monitor the subsidence for expressway traffic network over large area,but also has high monitoring precision.

Key words: multiple images coherent targets small baselines InSAR (MCTSB-InSAR), ground subsidence monitoring, expressway

CLC Number: