| 佛山地铁沿线时序InSAR形变时空特征分析 |
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| 引用本文： | 刘琦,岳国森,丁孝兵,杨坤,冯光财,熊志强.佛山地铁沿线时序InSAR形变时空特征分析[J].武汉大学学报(信息科学版),2019,44(7):1099-1106. |
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| 作者姓名： | 刘琦 岳国森 丁孝兵 杨坤 冯光财 熊志强 |
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| 作者单位： | 1.中南大学地球科学与信息物理学院, 湖南 长沙, 410083 |
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| 基金项目： | 中南大学中央高校基本科研业务费专项资金2017zzts774国家自然科学基金41574005 |
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| 摘 要： | 佛山作为中国珠三角地区经济和城市化高速发展的城市，由于其脆弱的地质水文条件，长期遭受地面沉降灾害的影响。同时，该区域地铁作为缓解城市交通压力的重要工具，其施工和运行所导致的地面沉降也影响了人们的生命财产安全。但目前针对佛山地区相关的系统研究不多，对地铁沿线的沉降规律认识不足。利用Sentinel-1数据监测了2015-06至2018-09间佛山市的形变信息，结果表明，佛山市地表形变呈零星分布，未出现大范围的沉降漏斗，形变速率为-20~5 mm/a，局部区域的沉降速率超过-30 mm/a。地面沉降主要与不稳定的地质结构、地下水抽取和局部区域工程施工有关。基于获得的形变结果，对佛山市地铁沿线的形变情况进行了研究，并对2018年佛山市地铁坍塌事故路段的沉降情况进行了详细分析，阐述了在空间分布上地铁沿线沉降差异的成因，并在时间上对地铁沿线的形变进行了模型参数反演。研究工作为今后当地政府开展地表形变普查、沉降灾害预警提供了参考，并为地铁正常运行与维护的安全监测提供了理论依据。
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| 关 键 词： | 佛山 PS-InSAR 形变监测 地铁沉降 |
| 收稿时间： | 2019-02-20 |
Temporal and Spatial Characteristics Analysis of Deformation Along Foshan Subway Using Time Series InSAR |
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| Institution: | 1.School of Geosciences and Info-physics, Central South University, Changsha 410083, China2.Foshan Surveying Mapping and Geoinformation Research Institute, Foshan 538000, China |
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| Abstract: | As a city with rapid economic development and urbanization in China's Pearl River Delta region, Foshan has been affected by land subsidence disasters for a long time due to its fragile geological and hydrological conditions. At the same time, the subway in the region is an important tool to alleviate the traffic pressure of the city. The ground subsidence caused by its construction and operation affects the safety of people's lives and property. However, there are not many systematic studies on this aspect in Foshan, and there is insufficient understanding of the settlement law along the subway. This paper uses fixed-point data to monitor the deformation information of Foshan from June 2015 to September 2018. The results show that the surface deformation of Foshan is sporadic, and there is no large-scale settlement funnel. The deformation rate is between 5 mm/a and -20 mm/a, and the settlement rate of local area is over -30 mm/a.Land subsidence is mainly related to unstable geological structures, groundwater extraction and local area construction. Based on the obtained deformation results, this paper also studies the deformation along the subway in Foshan city, and analyzes the settlement of the collapse section of Foshan subway in 2018, and expounds the cause of the difference in the space along the subway. In the time, the model parameters are inversed in the deformation along the subway. This paper provides a reference for the local government to carry out the survey of surface deformation and the early warning of subsidence disasters. And it provides a theoretical basis for the safety monitoring of the normal operation and maintenance of the subway. |
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