PS-InSAR技术在郑州市区地表沉降监测中的应用及精度评估  

Application of PS-InSAR technology in surface settlement monitoring in Zhengzhou and its accuracy

作　　者：朱俊峰 Zhu Junfeng(Henan Institute of Geophysical Spatial Information,Zhengzhou 450009,China)

机构地区：[1]河南省地球物理空间信息研究院,郑州450009

出　　处：《工程勘察》2025年第1期69-73,共5页Geotechnical Investigation & Surveying

摘　　要：地表形变是我国城市地质面临的主要灾害之一。本文利用PS-InSAR技术获取郑州市区地表沉降的时空分布信息,揭示郑州市区地表沉降的空间分布格局,同时对获取的形变量进行精度评估。结果表明,研究时间内(2021.01~2021.12)郑州市区整体上发生不均衡沉降现象,最大沉降量、最大抬升量分别为-19.8mm、15.5mm;PS-InSAR技术反演郑州市地表沉降结果与人工水准测量结果总体较为吻合,PS-InSAR技术与人工水准测量结果最大偏差为4.05mm,最小偏差为0.15mm,STD和RMS值分别为1.92mm、2.24mm,其结果可进一步证实PS-InSAR技术反演城市地表沉降具有大面积、全天候、高效率等特点,其地表监测结果能够为管理部门治理地表沉降灾害防治工作提供参考依据。Surface deformation is one of the main disasters faced by urban geology in China.this paper uses the PS-InSAR technology to obtain the spatial-temporal distribution information of surface subsidence in the urban area of Zhengzhou,and evaluates the accuracy of the obtained deformation variables.The results show that during the study period(2021.01~2021.12),the uneven settlement phenomenon occurred in the urban area of Zhengzhou as a whole,with the maximum settlement of-19.8mm and the maximum uplift of 15.5mm;The results of land subsidence retrieved by PS-InSAR technology in Zhengzhou are in good agreement with the results of artificial leveling.The maximum deviation between the results of PS-InSAR technology and the results of artificial leveling is 4.05mm,the minimum deviation is 0.15mm,and the STD and RMS values are 1.92mm and 2.24mm,respectively.This further confirms that the urban land subsidence retrieved by PS-InSAR technology is characterized by large area,all-weather and high efficiency.The surface monitoring results can provide reference for the management department to control the ground subsidence disaster.

关 键 词：郑州市 合成孔径雷达干涉测量 数字高程模型 地质灾害 沉降速率 

分 类 号：TU196[建筑科学—建筑理论] P237[天文地球—摄影测量与遥感]