Ground Subsidence Monitoring of Guangzhou Metro from 2017 to 2020 Based on IPTA Technique
Interference Point Target Analysis (IPTA) is a commonly used technique for ground subsidence monitoring, which can o-vercome the effects of atmospheric delays and spatio-temporal dis-correlation to obtain high-accuracy monitoring data. In this paper, we use IPTA and 85 Sentinel-1A images acquired between May 2017 and May 2020 to obtain the annual average subsidence rate of Guangzhou. Besides, this paper analyzes the spatial distribution characteristics of subsidence along the metro in Guangzhou. The re-sults show that the overall ground surface along the metro in Guangzhou is relatively stable, and the settlements are mainly concentrat-ed along Line 6, with the largest settlement funnel located at Kemulang Station, where the settlement rate reaches -39. 5 mm/yr. Combined with the on-site validation results, it proves that IPTA can provide reliable information for settlement monitoring along the metro in a large-scale city.
ground subsidence monitoring of metroIPTASentinel-1A
万方数据
维普
