摘要
基于2014年12月至2019年10月的Sentinel-1卫星68景InSAR数据,监测广州市南沙区多年地表形变,结合现场地面沉降调查情况进行验证。结果表明,南沙区存在7处大范围的沉降区域,均分布于人类工程活动密集的河流沿岸、施工区域、围垦区域等,其中位于珠江街道八涌和十涌之间的义和围村的沉降量级和面积最大,最大年平均沉降速度超过60 mm/a,部分时序点最大累积地面沉降量超过140 mm。本文进一步对南沙区其中4处地面沉降区域进行野外验证和分析,表明南沙区地面沉降诱发因素主要为软土发育、建筑荷载、抽排地下水、欠固结软土人工加速排水等。
Based on the Sentinel-1 satellite 68 view InSAR data from December 2014 to October 2019,the surface deformation was monitored for years and verified combined with investigation of field land subsidence in Nansha District of Guangzhou City.The results demonstrate that Nansha District has seven large settlement zones distribut⁃ed in areas where human engineering activities are intensive such as riverside,constructing area and planting area etc.The Yihewei Village located between Ba Chong and Shi Chong on Pearl River Street has the highest settlement magnitude and the largest settlement area,with the maximum annual average settlement speed exceeding 60mm/a and the maximum accumulated land subsidence at some sequential points exceeding 140mm.Field verification and analysis was conducted at four land subsidence zones in Nansha District.The results of analysis demonstrate the in⁃ducing factors of land subsidence in Nansha District mainly include soft soil development,building loads,pumping of underground water,artificially accelerated drainage of under-consolidated soft soil.
作者
邵山
罗锡宜
姚佳芮
贾毅
叶疆
孟相鹏
马新建
SHAO Shan;LUO Xi-yi;YAO Jia-rui;JIA Yi;YE Jiang;MENG Xiang-peng;MA Xin-jian(Geological Environmental Center of Hubei Province,Wuhan 430000,China;Geology Bureau of Foshan City,Foshan 528000,China)
出处
《广西水利水电》
2023年第2期7-13,共7页
Guangxi Water Resources & Hydropower Engineering
基金
广东省地质灾害应急装备维护升级与宣传(编号0835-90Z13003291)。
关键词
地面沉降
INSAR
诱发因素
南沙区
广州市
Land subsidence
InSAR
inducing factor
Nansha District
Guangzhou City
