基于SBAS技术的深圳市赛格大厦地表形变监测

Surface deformation monitoring of Saige Tower in Shenzhen based on SBAS Technology

2021年5月18日,深圳市福田区赛格大厦发生了异常晃动,由于大厦位于城市的中心地带,一旦出现事故,带来的后果将不堪设想,因此对大厦实施沉降监测,进行风险评估具有重大意义。利用小基线集合成孔径雷达干涉测量(Small Baseline Subset Interferometric Synthetic Aperture Radar,SBAS-InSAR)技术,采用时间跨度为2019年5月至2021年4月的29景Sentinel-1A数据,对赛格大厦及其周边地区进行地表形变监测。研究结果表明:大厦累计最大沉降量为2019年8月的-2.00 mm,最大抬升量为2020年10月的+2.02 mm,整体形变较为稳定,特别是2021年1月至4月,赛格大厦形变量在0.4 mm范围内微小波动,不存在沉降或抬升现象。此判断不但与现场的地质情况一致,还与多个专业机构的监测结果吻合。

Saige Tower in Futian District of Shenzhen City shaked abnormally on May 18,2021.Due to the center location of the building in the city,the consequences would be unimaginable,once there was an accident.Therefore,it is of great significance to monitor the building settlement and evaluate its risk.In this paper,the authors monitored the surface deformation of Saige Tower and its surrounding areas using 29 Sentinel-1A data from May 2019 to April 2021,based on Small Baseline Subset Interferometric Synthetic Aperture Radar(SBAS-InSAR)technology.The results show that the cumulative maximum settlement of the building was-2.00 mm in August 2019,and the maximum uplift was+2.02 mm in October 2020.The overall deformation is relatively stable,and the deformation of Saige Tower fluctuates slightly within 0.4mm without settlement or uplift,especially from January 2021 to April 2021.This judgment is not only consistent with the geological conditions of the site,but also consistent with the monitoring results of multi professional institutions.