Applicaion Of InSAR Technology In Deformation Mon-Itoring Of Urban Rail Transit In Shenzhen

Urban rail transit has played an important role in alleviating the growing of urban traffic pressure and accelerating urbanization.However,the ground subsidence caused by human factors and natural factors seriously threatens the construction and safe operation of urban rail transit which needs to be monitored.Conventional deformation monitoring means(total station,level,GPS,etc.)monitor urban rail trasit through the regular site operation to achieve high-precision which will decrease the frequency and range of monitoring.As a new type of observation means,InSAR technology is gradually applied to the deformation monitoring of urban rail transit.For the limit of traditional D-InSAR technique caused by the temporal decorrelation and geometric decorrelation which will reduce the accuracy and reliability of urban rail transit monitoring,the rate of deformation of rail transit lines and stations are obtained by applying Persistent Scatterers InSAR(PS-InSAR)to monitor the deformation of urban rail transit used TerraSAR-X imagery which in the StripMap mode in this article.By takeing Shenzhen urban rail transit line 3 as research object,the subsidence pattern which accuracy index of deformation rate is less than 2mm/a are obtained.The monitoring results have achieved the ideal effect in the application of rail transit deformation monitoring...