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当前大中型城市普遍存在地面沉降的现象,地面沉降会给城市建筑、基础设施、地下空间建设等带来巨大的威胁,从而给人民群众生产、生活及生命安全带来隐患。为了可以及时预防城市地面沉降带来的灾害,该文采用较为前沿的永久散射体差分干涉测量(PS-In SAR)和小基线集(SBAS)技术分别对常州市武进区的地面进行沉降监测,分别得到了武进区的主要沉陷区分布图和沉降值大小。最后结合当地水准数据得到PS-In SAR与SBAS技术的平均误差均小于2.3mm/a,均方根误差小于4.4mm/a,从而证明了PS-In SAR与SBAS技术监测该地区的地面沉降精度达毫米级是可行的,两种技术都可以应用到城市地面沉降监测中。
At present, there is widespread land subsidence in large and medium-sized cities. Land subsidence will bring huge threats to urban buildings, infrastructures and underground space construction, thus bringing hidden dangers to people’s production, life and life safety. In order to prevent the disaster brought by urban land subsidence in time, this paper uses the more advanced PS-In SAR and SBAS technology to monitor the ground settlement of Wujin District, Changzhou, Obtained Wujin District, the main subsidence area distribution and settlement values. Finally, the average error of PS-In SAR and SBAS obtained with local leveling data is less than 2.3mm / a, and the root mean square error is less than 4.4mm / a, which proves the accuracy of PS-In SAR and SBAS in monitoring land subsidence Millimeters are feasible and both technologies can be applied to urban land subsidence monitoring.