| 基于时序InSAR和GPS技术的北京平原区地表三维形变场特征 |
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| 引用本文： | 雷坤超,马凤山,陈蓓蓓,罗勇,崔文君,刘贺,田芳.基于时序InSAR和GPS技术的北京平原区地表三维形变场特征[J].工程地质学报(英文版),2022,30(2):417-431. |
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| 作者姓名： | 雷坤超 马凤山 陈蓓蓓 罗勇 崔文君 刘贺 田芳 |
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| 作者单位： | ①.中国科学院地质与地球物理研究所，中国科学院页岩气与地质工程重点实验室，北京 100029，中国 |
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| 基金项目： | 北京卓越青年科学家项目;北京市自然科学基金;北京市优秀人才培养青年拔尖个人资助项目;国家自然科学基金 |
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| 摘 要： | 文中采用InSAR与GPS技术相结合,获取了北京平原区时序地表三维形变场信息,分析了其分布特征与演化规律.研究表明:(1)北京平原区在抽水引发的第四系附加应力场作用下,地表呈现出显著的三维变形特征,以垂向变形为主,并辅以水平向位移.(2)平原区地面沉降主要集中在东部、北部和南部等地,存在多个沉降中心,总体呈减缓的趋势....
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| 关 键 词： | InSAR GPS 地面沉降 水平形变 三维形变场 |
| 收稿时间： | 2021-03-02 |
THREE-DIMENSIONAL ( 3D) SURFACE DISPLACEMENT IN BEIJING PLAIN BASED ON TIME SERIES INSAR AND GPS TECHNOLOGIES |
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| LEI Kunchao,MA Fengshan,CHEN Beibei,LUO Yong,CUI Wenjun,LIU He,TIAN Fang.THREE-DIMENSIONAL ( 3D) SURFACE DISPLACEMENT IN BEIJING PLAIN BASED ON TIME SERIES INSAR AND GPS TECHNOLOGIES[J].Journal of Engineering Geology,2022,30(2):417-431. |
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| Authors: | LEI Kunchao MA Fengshan CHEN Beibei LUO Yong CUI Wenjun LIU He TIAN Fang |
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| Institution: | ①.Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China②.Beijing Institute of Hydrogeology and Engineering Geology, Beijing 100195, China③.Key Laboratory of the Ministry of Education Land Subsidence Mechanism and Prevention, Capital Normal University, Beijing 100048, China |
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| Abstract: | This paper uses the time series InSAR and GPS technologies to obtain the three-dimensional surface deformation in Beijing Plain. It analyze its spatial distribution and evolution characteristics. The results show the following findings. (1)Under the Quaternary additional stress field caused by pumping,the three-dimensional surface deformation characteristics are significant in Beijing Plain. The vertical deformation is the main component and horizontal displacement is a supplement. (2)Land subsidence are mainly located in the east,north and south part of Beijing plain. There are multiple subsidence centers,and the overall trend is slowing down. The most serious subsidence areas are distributed in east part of Chaoyang District and parts of Tongzhou District. The subsidence rate has exceeded 100 mm·a-1 for many years. The maximum subsidence rate is 143.20 mm·a-1,the maximum accumulated subsidence is 816.77 mm,and the uneven subsidence is obvious. (3)Under the ITRF2005 reference frame,the horizontal direction of GPS points in the plain are consistent,mainly in the SE direction. The dominant movement direction is NE112.5°~NE113.8°. The movement rate of E direction is 27.12~36.19 mm·a-1,and the average rate is 30.78 mm·a-1. The movement rate of N direction is -10.90~-19.73 mm·a-1,and the average rate is -13.57 mm·a-1. They reflect that the continuous deformation in Beijing plain is under the situation of a unified continental dynamic environment. (4)Under the Eurasian reference frame,the horizontal movement rate of GPS points are significantly reduced. The deformation between GPS points is varies with no consistent change trend. In particular,in joint area of several major active faults,where both of the InSAR derived vertical subsidence rate and the GPS horizontal movement rate are large. The horizontal movement direction of the GPS points generally direct to the center of subsidence or the funnel of the groundwater level,or from the high water level to the low water level area. This is mainly caused by the horizontal deformation of the Quaternary aquifer system caused by the extraction of groundwater. |
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