佛山地铁塌陷InSAR时序监测及机理分析

张严 朱武 赵超英 韩炳权

张严, 朱武, 赵超英, 等. 2021. 佛山地铁塌陷InSAR时序监测及机理分析[J]. 工程地质学报, 29(4): 1167-1177. doi: 10.13544/j.cnki.jeg.2019-557
引用本文: 张严, 朱武, 赵超英, 等. 2021. 佛山地铁塌陷InSAR时序监测及机理分析[J]. 工程地质学报, 29(4): 1167-1177. doi: 10.13544/j.cnki.jeg.2019-557
Zhang Yan, Zhu Wu, Zhao Chaoying, et al. 2021. Moniting and inversion of Foshan metro collapse with multi-temporal InSAR and field investigation[J]. Journal of Engineering Geology, 29(4): 1167-1177. doi: 10.13544/j.cnki.jeg.2019-557
Citation: Zhang Yan, Zhu Wu, Zhao Chaoying, et al. 2021. Moniting and inversion of Foshan metro collapse with multi-temporal InSAR and field investigation[J]. Journal of Engineering Geology, 29(4): 1167-1177. doi: 10.13544/j.cnki.jeg.2019-557

佛山地铁塌陷InSAR时序监测及机理分析

doi: 10.13544/j.cnki.jeg.2019-557
基金项目: 

国家自然科学基金 41941019

国家自然科学基金 42074040

国家重点研发计划 2020YFC1512001

国家重点研发计划 2019YFC1509802

详细信息
    作者简介:

    张严(1994-),女,硕士生,主要从事InSAR方面的科研工作. E-mail: 1798138099@qq.com

    通讯作者:

    朱武(1982-),男,博士,教授,博士生导师,主要从事InSAR方面的科研和教学工作. E-mail: 48801911@qq.com

  • 中图分类号: P236

MONITING AND INVERSION OF FOSHAN METRO COLLAPSE WITH MULTI-TEMPORAL INSAR AND FIELD INVESTIGATION

Funds: 

by National Natural Science Foundation of China 41941019

by National Natural Science Foundation of China 42074040

National Key R&D Program of China 2020YFC1512001

National Key R&D Program of China 2019YFC1509802

  • 摘要: 2018年2月7日,位于广东省佛山市禅城区的地铁2号线在盾构施工中发生塌陷事故,造成11人死亡、1人失踪、8人受伤,直接经济损失超过5000万元。为深入分析此次事故成因,本文基于自2017年3月~2019年1月期间的56景Sentinel-1A数据,利用SBAS-InSAR技术获取了研究区的时空形变信息。结果发现塌陷区及其附近区域在监测期间存在持续的地面沉降,形变速率达到30 mm·a-1以上。通过对事发地的实地调查和形变特征分析,并结合当地地质资料推测了塌陷形成的机理:供水管道下方的软土存在不均匀沉降,使水管产生裂缝导致管道内水外渗,进而致使还未达到胶装凝固点的管片产生裂缝,最终引起隧道和地面坍塌。研究结果可以为今后盾构施工中塌陷的监测和预警工作提供理论依据。
  • 图  1  研究区及Sentinel-1A数据覆盖范围示意图

    Figure  1.  Schematic diagram of the research area and Sentinel-1A data coverage area

    图  2  禅城区第四系沉积物等厚线图(改自易守勇等,2007)

    Figure  2.  Isopach map of Quaternary sediment in Chancheng district

    图  3  禅城区软土分布等厚线图(改自易守勇等,2007)

    Figure  3.  Isopach map of soft soil distribution in Chancheng district

    图  4  塌陷事故现场图(改自张爱军等,2018)

    Figure  4.  Map of collapse accident site

    图  5  地质剖面图(改自易守勇等,2007)

    Figure  5.  Geological section map

    图  6  时空基线分布图

    Figure  6.  Temporal and perpendicular baseline distribution

    图  7  年平均形变速率图

    Figure  7.  Annual land subsidence rate map

    图  8  塌陷坑附近区域年平均速率图

    Figure  8.  Annual land subsidence rate map of the area near the collapse pit

    图  9  P点形变时间序列图

    Figure  9.  The time-series of point P

    图  10  剖线AB沿线的沉降量

    Figure  10.  Deformation along line AB

    图  11  野外实地调查照片

    Figure  11.  Field survey photos

    图  12  塌陷机理分析示意图(改自易守勇等,2007)

    Figure  12.  Schematic diagram of collapse mechanism

    图  13  小型塌陷事故现场图

    Figure  13.  Map of minor collapse accident site

    表  1  Sentinel-1A数据参数

    Table  1.   Parameters of Sentinel-1A

    影像获取时间 影像数量 极化方式 升/降轨
    2017-03-12~2019-01-25 56景 VH+VV 升轨
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-12-24
  • 修回日期:  2020-04-21
  • 网络出版日期:  2021-09-03
  • 刊出日期:  2021-09-03

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