摘要
1970年1月5日,通海县盆地区曾发生7级以上大地震。针对该区域内复杂的地质结构及缺乏大面积的有效监测等问题,采用SBAS-InSAR技术处理覆盖通海县盆地的69景2018年7月20日~2020年11月18日Sentinel-1A影像,首先获取了整体地表形变沉降速率,然后分析了沉降区分布特征及4个典型沉降区,最后对沉降区的成因进行探究。结果表明:通海县盆地区域内总体沉降速率为-90.55mm/a~39.99 mm/a,广泛分布有多个明显沉降带,且这些沉降带有逐渐成片蔓延的趋势;区域内的沉降主要与城市建设荷载及曲江断裂地质结构有关。
On January 5,1970,an earthquake of magnitude more than 7 occurred in the basin area of Tonghai County.Aiming at the problem that the complex geological structure and the lack of effective monitoring in the area.In this paper,SBAS-InSAR technology was applied to process 69 Sentinel-1A SAR images covering Tonghai County from July 20,2018 to November 18,2020.First,the overall surface deformation settlement rates was extracted,then the distribution characteristics of the settlement area and four typical settlement areas were analyzed,and finally the cause of the settlement area is explored.The results showed that the overall subsidence rates in the basin of Tonghai County is-90.55mm/a~39.99mm/a,and there are many obvious subsidence zones widely distributed,and these subsidence zones tend to spread gradually;the subsidence in the area is mainly related to the urban construction load and the geological structure of the Qujiang fault.
作者
肖波
高帅
喜文飞
周定义
赵振峰
Xiao Bo;Gao Shuai;Xi Wenfei;Zhou Dingyi;Zhao Zhenfeng(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;School of Highway and Architectural Engineering,Yunnan Communications Vocational and Technical College,Kunming 650500,China;Beijing Urban Construction Exploration & Surveying Design Research Institute Co.,Ltd.,Beijing 100101,China;College of Tourism and Geographic Sciences,Yunnan Normal University,Kunming 650500,China)
出处
《城市勘测》
2021年第4期91-95,共5页
Urban Geotechnical Investigation & Surveying
基金
国家地区自然科学基金项目(41761081)。
