1.Key Lab of 3D Information Acquisition and Application, Ministry of Education, Beijing 100048, China 2.State Key Laboratory Breeding Base of Process of Urban Environment and Digital Simulation, Beijing 100048, China 3.Beijing Institute of Hydrogeology and Engineering Geology, Beijing 100195, China 4.School of Geology and Geomatics, Tianjin Chengjian University, Tianjin 300384, China
In this paper, according to the land subsidence problem existing in the Beijing-Tianjin inter-city railway (Beijing section), time-series synthetic aperture Radar interferometry was used to obtain the land subsidence information from 2010 to 2015. Combined with the measured data of groundwater, the relationship between the groundwater level changes and the land subsidence at different layers was studied by using the cross wavelet method. Finally, the relationship between land subsidence and compressible clay thickness was analyzed based on the distribution of compressible clay in the study area. The result showed that average annual maximum sedimentation rate in the study area was 121mm/a, that the ground subsidence lagged the pressure level of the pressure level by 910 months, with the lag time of the submersible being 4 months, and that the ground subsidence rate in the control range of the same flushing fan increased with the thickness of compressible clay layer. This research is of great significance for the scientific effective prevention and control of uneven ground settlement on linear ground objects.
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2019, Vol. 31 
), 雷坤超3, 陈文锋1,2, 高明亮1,2, 周超凡1,2, 段光耀4
