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三峡库区巫溪凤凰山危岩体失稳机理与碎屑流动力学特征

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文章导航 > 华南地质 > 2023 > 39(3): 470-481

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程什, 代贞伟, 付小林, 张安乐, 王鲁琦, 张晨阳, 杨龙伟, 蒋先念. 2023. 三峡库区巫溪凤凰山危岩体失稳机理与碎屑流动力学特征. 华南地质, 39(3): 470-481. doi: 10.3969/j.issn.2097-0013.2023.03.006
引用本文: 程什, 代贞伟, 付小林, 张安乐, 王鲁琦, 张晨阳, 杨龙伟, 蒋先念. 2023. 三峡库区巫溪凤凰山危岩体失稳机理与碎屑流动力学特征. 华南地质, 39(3): 470-481. doi: 10.3969/j.issn.2097-0013.2023.03.006
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CHENG Shi, DAI Zhen-Wei, FU Xiao-Lin, ZHANG An-Le, WANG Lu-Qi, ZHANG Chen-Yang, YANG Long-Wei, JIANG Xian-Nian. 2023. Instability Mechanism and Debris Flow Dynamics of Fenghuang Mountain Dangerous Rock Mass in Wuxi, Three Gorges Reservoir Area. South China Geology, 39(3): 470-481. doi: 10.3969/j.issn.2097-0013.2023.03.006
Citation: CHENG Shi, DAI Zhen-Wei, FU Xiao-Lin, ZHANG An-Le, WANG Lu-Qi, ZHANG Chen-Yang, YANG Long-Wei, JIANG Xian-Nian. 2023. Instability Mechanism and Debris Flow Dynamics of Fenghuang Mountain Dangerous Rock Mass in Wuxi, Three Gorges Reservoir Area. South China Geology, 39(3): 470-481. doi: 10.3969/j.issn.2097-0013.2023.03.006
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三峡库区巫溪凤凰山危岩体失稳机理与碎屑流动力学特征

  • 1. 中国地质调查局武汉地质调查中心（中南地质科技创新中心）,湖北 武汉 430205

  • 2. 三峡大学土木与建筑学院,湖北 宜昌 443002

  • 3. 重庆大学土木工程学院,重庆 400045

  • 4. 中国地质大学（武汉）工程学院,湖北武汉430074

  • 5. 中煤科工集团武汉设计研究院有限公司,湖北 武汉 430064

  • 6. 重庆市地质矿产勘查开发局208水文地质工程地质队, 重庆 400700

  • 基金项目:

    湖北省自然科学基金项目（NO. 2020CFB352）、三峡后续工作地质灾害防治项目（NO. 0001212023CC60001、NO.00012120 21CC60001）

详细信息
    作者简介: 程什（2000—），男，硕士研究生，从事地质灾害动力学成灾机理研究，E-mail：852996115@qq.com
    通讯作者: 代贞伟（1986—），男，博士，高级工程师，从事地质灾害防灾减灾研究工作，E-mail：daizhenwei@mail.cgs.gov.cn

  • 中图分类号: P642.21

Instability Mechanism and Debris Flow Dynamics of Fenghuang Mountain Dangerous Rock Mass in Wuxi, Three Gorges Reservoir Area

  • 1.Wuhan Center, China Geological Survey (Geosciences Innovation Center of Central South China),Wuhan 430205, Hubei, China

  • 2. College of Civil Engineering & Architecture, China Three Gorges University, Yichang 443002, Hubei, China

  • 3. School of Civil Engineering, Chongqing University, Chongqing 400045, China

  • 4. Faculty of Engineering, China University of Geosciences, Wuhan 430074, Hubei, China

  • 5.Wuhan Design & Research Institute Co., Ltd. of China Coal Technology & Engineering Group,Wuhan 430064, Hubei, China

  • 6. No. 208 Hydrogeology and Engineering Geology Team of Chongqing Bureau of Geology and Minerals Exploration, Chongqing 400700, China

More Information
    Corresponding author: DAI Zhen-Wei

    摘要
  • 三峡库区巫溪县凤凰山发育有较多呈带状分布危岩体，严重威胁到沿线居民的生命财产安全。本文通过野外地质调查、遥感影像分析和数值模拟分析等方法，总结了凤凰山危岩体的崩塌失稳机理，利用动力学软件DAN-W模拟了危岩体崩塌碎屑流运动全过程，并探讨了群塌效应下碎屑流动力特征和碎屑流运动对建筑物的影响。结果表明：危岩体崩塌碎屑流动力学过程主要分为崩塌启动-碎屑流通-碎屑堆积三个阶段，危岩体BW61和BW68崩塌所产生碎屑流的最大速度分别为22.14 m/s和18.12 m/s，运动距离分别为171 m和182 m，平均厚度分别为1.57 m和1.20 m。两处危岩体发生群崩并转化为碎屑流所产生冲击压强高达132.22kPa，下方道路和居民建筑有被完全摧毁的风险。相关研究可为三峡库区危岩体风险评价和科学防控提供一定的理论依据。
    A large number of dangerous rock bodies distributes in Fenghuang Mountain, Wuxi County, Three Gorges Reservoir area, in the form of bands which seriously threaten the life and property safety of the residents along the route. This paper summarizes the collapse destabilization mechanism of the dangerous rock bodies in Fenghuang Mountain through field geological survey, remote sensing image analysis and numerical simulation analysis, simulates the whole process of the collapse debris flow movement of the dangerous rock bodies by using the dynamics software DAN-W, and discusses the dynamic characteristics of debris flow and the influence of debris flow movement on buildings under the effect of group collapse. The results show that the collapse debris flow dynamics of the dangerous rock bodies are mainly divided into three stages: collapse initiation, debris flow, and debris accumulation, and the maximum velocity of the debris flow generated by the cluster collapse of BW61 and BW68 is 22.14 m/s and 18.12 m/s, the distance of the movement is 171 m and 182 m, and the average thickness is 1.57 m and 1.20 m. If the two dangerous rock bodies collapse and transform into debris flows, the impact could reach as high as 132.22 kPa, and the roads and residential buildings below are at risk of being completely destroyed. This study could provide some theoretical basis for the risk evaluation and scientific prevention and control of dangerous rock bodies in the Three Gorges reservoir area.
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收稿日期:  2023-05-28
修回日期:  2023-07-26

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