Paper Info
Title
Surface Deformation of Expansive Soil at Ankang Airport, China, Revealed by InSAR Observations
Abstract
Ankang Airport is constructed on an expansive soil-fill platform in Shaanxi Province, Central China. Since its completion in 2020, it has suffered surface deformation caused by the consolidation and settlement of the fill layer and instability of the expansive soil slope. Exploring the special deformation law of expansive soil regions by remote sensing and analyzing the deformation characteristics of airports in mountainous areas have always been key issues in related disaster research. Based on the intensity and phase observation data of 37 Sentinel-1 synthetic aperture radar images, this study obtained the spatio-temporal distribution of the deformation of Ankang Airport from May 2020 to October 2021. First, phase optimization was performed on the original interferograms. Second, the persistent scatterer synthetic aperture radar interferometry (PS-InSAR) method was applied to extract the surface deformation information of Ankang Airport, and the accuracy was evaluated. Finally, the singular spectrum analysis method was introduced to jointly analyze the deformation information obtained by the InSAR technology in combination with geological and climatic data. The results show that the excavation area of Ankang Airport was basically stable, the filling area had obvious surface and uneven deformation, and the expansive soil fill slope exhibits deformation characteristics strongly related to slope, rainfall, and fill depth. The deformation was mainly caused by consolidation and settlement, supplemented by the expansion and shrinkage deformation of the expansive soil.
Year
DOI
Venue
2022
10.3390/rs14092217
REMOTE SENSING
Keywords
DocType
Volume
ankang airport, expansive soil, phase optimization, PS-InSAR, singular spectrum analysis (SSA)
Journal
14
Issue
ISSN
Citations 
9
2072-4292
0
PageRank 
References 
Authors
0.34
0
10
Name
Order
Citations
PageRank
Shuangcheng Zhang102.70
Jinzhao Si200.68
Yufen Niu301.01
Wu Zhu402.03
Qianyou Fan500.68
Xingqun Hu600.34
Changbo Zhang700.34
Peng An800.34
Zhipeng Ren900.34
Zhenhong Li1004.39