基于ASAR数据的青藏线多年冻土区形变监测研究  

A study of deformation monitoring of permafrost area along Qinghai-Tibet railway based on ASAR data

作　　者：李珊珊[1,2] 王平[3] 胡俊[1,2] 

机构地区：[1]中南大学地球科学与信息物理学院,长沙410083 [2]湖南省普通高校精密工程测量及形变灾害监测重点实验室,长沙410083 [3]湖南城市学院,长沙413000

出　　处：《工程勘察》2012年第12期50-54,共5页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金项目(40974006;40774003);香港研究局资助局项目(PolyU5161/06E;PolyU5155/07E)

摘　　要：青藏铁路多年冻土区域路基稳定性关系到青藏铁路能否长期安全运营,因此对铁路沿线冻土区进行形变监测有着非常重要的意义。近年来,雷达差分干涉测量(D-InSAR)技术已发展成为监测地表形变的一项重要技术手段。本文利用此技术结合重复轨道ENVISAT ASAR雷达影像数据,获取青藏铁路羊八井-当雄区冻土形变结果,所得形变结果与冻土冻胀融沉的物理变化规律非常符合,说明采用D-InSAR技术提取铁路沿线冻土区域大范围地表形变信息的效果良好。The stability of Qinghai-Tibet railway em safety operation of Qinghai-Tibet railway, therefore, permafrost zone along the railway. In recent years, bankment in permafrost regions relates to the long-term it is very important to monitor the deformation of the differential interferometry of synthetic aperture radar （D-InSAR） has been developed into an important technique for monitoring ground surface deformation. In this paper, we has used the DInSAR method to obtain ground deformation of Dangxiong-to-Yangbajing section of Qinghai-Tibet railway with ENVISAT ASAR radar images, and the results consist with physical changes law of permafrost thawing and frozen very well, which indicates the good effect of applying DInSAR technology at permafrost areas along railway.

关 键 词：冻土 形变 干涉测量 D-INSAR ENVISAT ASAR 

分 类 号：P225.1[天文地球—大地测量学与测量工程]