Bulletin of Surveying and Mapping ›› 2025, Vol. 0 ›› Issue (3): 39-45.doi: 10.13474/j.cnki.11-2246.2025.0307

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Fusion of time-series InSAR and ESMD for potential hazard identification and deformation monitoring of high-fill expansive soil airports

ZHANG Shuangcheng1,2,3, LI Sijiezi1,2, REN Zhipeng1,2, SI Jinzhao1,2, HU Xingqun4   

  1. 1. School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China;
    2. The Key Laboratory of intelligent Construction and Maintenance of CAAC, Xi'an 710064, China;
    3. Observation and Research Station of Ground Fissure and Land Subsidence, Ministry of Natural Resources, Xi'an 710054, China;
    4. Shaanxi Jiawei Space Geographic Information Technology Co., Ltd., Ankang 725000, China
  • Received:2024-08-22 Published:2025-04-03

Abstract: In this paper,the SBAS-InSAR technique is firstly applied to identify the deformation hazardous area of Ankang expanded soil airport,and obtain the long time series of the characteristic points of the hazardous area.Then,based on the ESMD algorithm,the deformation time series is decomposed,the seasonal physical signals are extracted,and the surface deformation signals are highlighted to obtain the seasonal band cycle of the time series and the frequency and time of the occurrence of the deformation anomalies.Finally,the deformation factors are analyzed in combination with the rainfall and temperature factors in the environmental loads. The results show that:①The deformation of the airport surface mainly occurs in the area of expansive soil fill,and the deformation of the high-fill slopes of the airport is especially obvious. ②The deformation of expansive soils is subject to seasonal fluctuations due to environmental factors and is prone to inhomogeneous settlement in summer. The results of this study provide important clues about the mechanism of cyclic deformation of expansive soils,and are useful for the monitoring of transportation infrastructures under expansive soil conditions.

Key words: expansive soil airports, time-series InSAR, ESMD algorithm, hidden hazard identification

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