| 陈 芳.地质雷达在兰州市北环路滑坡灾害应急勘查中的应用[J].甘肃地质,2024,(4):76-83 |
| 地质雷达在兰州市北环路滑坡灾害应急勘查中的应用 |
| Application of Geological Radar in Emergency Investigation of Landslide Disaster on North Ring Road in Lanzhou City |
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| DOI： |
| 中文关键词: 北环路8·9滑坡 地质雷达 应急勘查 应急处置 兰州市 |
| 英文关键词:landslide geological radar survey Lanzhou City |
| 基金项目:甘肃省自然资源大数据和国土空间治理能力基础建设项目“地质资料数据中心建设（GJGK2022169）”；甘肃省自然资源厅科技创新项目“甘肃省地质资料信息化成果集成与社会化共享服务提升研究（202245）”；西秦岭地区地质大数据找矿靶区定量预测研究项目（202202）；甘肃省西秦岭东段金矿大数据找矿靶区定量预测研究（2022CX18） |
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| 中文摘要: |
| 近年来随着极端气候事件的不断增加，由此造成的地质灾害也在逐年加剧，尤其是滑坡灾害，由于其隐蔽性、突发性强，成因复杂，往往对人民生命财产安全构成严重威胁。针对滑坡灾害，如何快速、有效查明滑坡体厚度、物质组成、地下水埋藏、分布特征等基础参数，是判别滑坡稳定性、研判发展趋势的基础，更是应急处置工作中的关键环节。为此，本文选取兰州市北环路8·9滑坡，采用地质雷达对滑坡体进行快速勘探，并辅以常规的钻探手段予以验证，研究地质雷达技术在滑坡勘查中的实际效果。研究认为：①地质雷达探测的滑坡体厚度与钻孔揭露的滑体体厚度误差在毫米级，在拥有较高的探测精度的同时，还具有操作简单、数据高速传输、携带便捷等特点；②鉴于黄土地区多为上部黄土，下部泥岩、砂岩的二元结构复合型斜坡，上部黄土层多较为松散，孔隙较大，下部泥、砂岩多较为致密，质地较为坚硬，其上、下部分土体密度、孔隙率变化明显，有利于地质雷达电磁波波率回弹反射和效果量化，可有效应用在黄土滑坡灾害应急处置中。 |
| 英文摘要: |
| In recent years, with the increasing number of extreme weather events, geological disasters caused by them have been worsening year by year, especially landslide disasters. Due to their concealment, suddenness, and complex causes, they often pose a serious threat to people's lives and property safety. How to quickly and effectively identify basic parameters such as the thickness, material composition, groundwater burial, and distribution characteristics of landslide disasters is the basis for judging landslide stability and assessing development trends, and is also a key link in emergency response work. Therefore, this article selects the 8.9 landslide on the North Ring Road in Lanzhou City and uses geological radar to quickly explore the landslide body, supplemented by conventional drilling methods for verification, to study the actual effect of geological radar technology in landslide exploration. Research suggests that: the thickness of landslide bodies detected by geological radar has an error of millimeter level compared to the thickness of landslide bodies exposed by drilling, which not only has high detection accuracy, but also has the characteristics of simple operation, high-speed data transmission, and convenient portability; given that the loess areas are mostly composed of a binary structure composite slope with upper loess and lower mudstone and sandstone, the upper loess layer is mostly loose and has large pores, while the lower mudstone and sandstone layers are mostly dense and hard in texture. The density and porosity of the soil in the upper and lower parts vary significantly, which is conducive to the rebound reflection and quantification of the effect of geological radar electromagnetic waves. It can be effectively applied in emergency response to loess landslide disasters. |
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