| 基于SBAS-InSAR技术的成汶高速汶川段滑坡易发区选线研究 |
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| 引用本文： | 刘沛源,常鸣,武彬彬,罗超鹏,周超.基于SBAS-InSAR技术的成汶高速汶川段滑坡易发区选线研究[J].地球科学,2022,47(6):2048-2057. |
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| 作者姓名： | 刘沛源 常鸣 武彬彬 罗超鹏 周超 |
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| 作者单位： | 成都理工大学地质灾害防治与地质环境保护国家重点实验室, 四川成都 610059 |
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| 基金项目： | 国家自然科学基金项目(Nos.U21A2032,42077245)； |
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| 摘 要： | 西南山区地质构造复杂导致大量的滑坡分布.为了科学有效的指导西南山区道路选线，提前规避地质灾害高风险，滑坡灾害早期识别必不可少.合成孔径雷达干涉测量(interferometric synthetic aperture radar，InSAR)技术因其全天候、多时相等特点被广泛应用于滑坡灾害的早期识别中.收集了87景Sentinel-1A降轨数据，利用差分干涉测量短基线集时序分析(small baseline subset interferometric synthetic aperture radar，SBAS-InSAR)技术对成汶高速路汶川段进行形变区的识别与分析，结果显示共识别出10处，经野外复核均为处于持续变形中的滑坡，有较好的一致性.根据早期识别结果，对3个比选方案进行综合对比分析，确定方案B为最优选择.SBAS-InSAR技术能有效识别山区公路潜在滑坡隐患区，为山区公路的准确选线提供科学依据.
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| 关 键 词： | 高速公路选线 滑坡隐患 差分干涉测量短基线集时序分析 时序形变分析 工程地质 |
| 收稿时间： | 2021-11-07 |
Route Selection of Landslide Prone Area in Wenchuan Section of Chengdu-Wenchuan Expressway Based on SBAS-InSAR |
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| Abstract: | The complex geological structure in the southwest mountainous area leads to the distribution of many landslides. Early landslide identification is essential to guide road route selection scientifically and effectively and avoid the high risk of geological disaster in advance. Interferometry Synthetic Aperture Radar (InSAR) is widely used in the early identification of landslides due to its all-weather and multi-temporal characteristics. In this paper, 87 sentinel-1A orbital descent data are collected. The small baseline subset interferometric synthetic aperture radar (SBAS-InSAR) is used to identify and analyze the potential landslide hazard in the Wenchuan section of Chengwen expressway. 10 deformation areas were identified through the SBAS-InSAR, which after field validation are landslides under continuous deformation. This conclusion corresponds to the actual case. Based on early identification results, three schemes are compared and analyzed, and scheme B is optimal. SBAS-InSAR can effectively identify potential landslide hazard areas of mountain roads and provide scientific support for accurate route selection of mountain expressways. |
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