INVESTIGATION ON INSAR TIME SERIES DEFORMATION MODEL CONSIDERING RHEOLOGICAL PARAMETERS FOR SOFT CLAY SUBGRADE MONITORING
The stability control is one of the major technical difficulties in the field of highway subgrade construction engineering.Building deformation model is a crucial step for InSAR time series deformation monitoring.Most of the InSAR deformation models for deformation monitoring are pure empirical mathematical models,without considering the physical mechanism of the monitored object.In this study,we take rheology into consideration,inducing rheological parameters into traditional InSAR deformation models.To assess the feasibility and accuracy for our new model,both simulation and real deformation data over Lungui highway(a typical highway built on soft clay subgrade in Guangdong province,China)are investigated with TerraSAR-X satellite imagery.In order to solve the unknows of the non-linear rheological model,three algorithms: Gauss-Newton(GN),Levenberg-Marquarat(LM),and Genetic Algorithm(GA),are utilized and compared to estimate the unknown parameters.Considering both the calculation efficiency and accuracy,GA is chosen as the final choice for the new model in our case study.Preliminary real data experiment is conducted with use of 17 TerraSAR-X Stripmap images(with a 3-m resolution).With the new deformation model and GA aforementioned,the unknown rheological parameters over all the high coherence points are obtained and the LOS deformation(the low-pass component)sequences are generated.
InSAR SBAS rheology highway deformation monitoring
X.Xing Z.Yuan L.F.Chen X.Y.Yu L.Xiao
State Engineering Laboratory of Highway Maintenance Technology,Changsha University of Science & Tech School of Electrical and Information Engineering,Changsha University of Science & Technology,410014 School of Traffic and Transportation Engineering,Changsha University of Science & Technology,410014
国际会议
北京
英文
1977-1982
2018-05-07（万方平台首次上网日期，不代表论文的发表时间）