摘要
针对填海区形成的地表浅层的地质结构不稳定、易受建筑荷载影响等问题,本文基于12景Sentinel-1A数据,采用两轨法对填海区进行沉降监测分析。结果表明,填海区地表呈现不均匀沉降现象,2021年最大沉降量为-9.6mm,最大抬升量为13.4mm,分析其原因可能是由填海造陆形成的地表浅层地质结构不稳定造成的。同时,基于二等水准数据对InSAR反演沉降结果进行精度评估,结果表明,InSAR反演填海区地表沉降与二等水准测量结果有较好的一致性,最大偏差为3.55mm,最小偏差为0.28mm,STD和RMS值分别为1.25mm、1.86mm。
Aiming at the problem that the geological structure of the shallow surface layer formed in the reclamation area is unstable and easy to be affected by the building load,based on 12 scenes Sentinel-1A data,this paper adopts the two track method to monitor and analyze the settlement of the reclamation area.The results show that the surface of the reclamation area presents the phenomenon of uneven settlement.In 2021,the maximum settlement is-9.6mm and the maximum uplift is 13.4mm,The reason may be caused by the unstable geological structure of the shallow surface layer formed by land reclamation.At the same time,the accuracy of InSAR inversion settlement results is evaluated based on the second-order leveling data.The results show that the InSAR inversion surface settlement in the reclamation area is consistent with that of the second-order leveling results,with the maximum deviation of 3.55mm,the minimum deviation of 0.28mm,and the STD and RMS values of 1.25mm and 1.86mm respectively.
作者
李旭民
Li Xumin(Shenzhen Geology Bureau,Shenzhen 518023,China)
出处
《工程勘察》
2024年第2期68-72,共5页
Geotechnical Investigation & Surveying
