基于SBAS技术的川藏铁路折多山地区地表形变监测与分析  

Monitoring and analysis of surface deformation in the Zheduoshan area of Sichuan-Tibet railway based on SBAS technology

作　　者：向淇文 潘建平[1] 张广泽[2] 徐正宣[2] 张定凯 涂文丽 XIANG Qiwen;PAN Jianping;ZHANG Guangze;XU Zhengxuan;ZHANG Dingkai;TU Wenli(College of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Geological Survey Institute of Second Academy of Railway Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]中铁二院工程集团有限责任公司地勘院,四川成都610031

出　　处：《测绘工程》2020年第4期48-54,59,共8页Engineering of Surveying and Mapping

基　　金：重庆市地理空间信息工程技术研究中心2018年开放课题(渝地信2018-258);卫星测绘技术与应用国家测绘地理信息局重点实验室(KLSMTA-201705)。

摘　　要：相比传统的地表形变监测,InSAR技术能够全天时、全天候、大范围地获取地表形变信息。SBAS短基线集作为一种新技术,能有效解决时空去相干、大气延迟等影响,获得高精度的地表形变信息。文章利用SBAS技术对川藏铁路折多山地区27景Sentinel-1A数据进行地表形变监测,得到该地区在2017-03—2018-12时间序列形变监测结果。通过分析该地区整体形变情况,圈定3个明显形变的范围,在其中一个形变范围内,发现3个疑似滑移区域,其最大形变量达到-92.3 mm/a。最后结合Google Earth光学影像,验证并分析这3个疑似滑移区域成因。Compared to traditional surface deformation monitoring,InSAR technology can obtain surface deformation information in all time,all weather,and a wide range.As a newly developed technology,SBAS short baseline set can effectively solve the effects of time and space de-coherence and atmospheric delay,and obtain high-precision surface deformation information.In this paper,SBAS technology is used to monitor the surface deformation of 27 Sentinel-1A data in the Zhe Duo Shan area of the Sichuan-Tibet railway,and the time series deformation results of the region from March 2017 to December 2018 are obtained.By analyzing the overall deformation in the area,three distinct deformation ranges were delineated,in which three suspected slip regions were found within a deformation range with a maximum deformation of-92.3 mm/a.Finally,the causes of these three suspected slip regions were verified and analyzed in conjunction with Google Earth optical images.

关 键 词：SBAS技术 川藏铁路 折多山 地表形变监测 

分 类 号：P228[天文地球—大地测量学与测量工程]