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汉源县工业园区硝厂沟泥石流成灾机理及其堆积范围分析

蓝再成, 胡卸文, 曹希超, 黄光林, 白金钊, 冯霄

蓝再成，胡卸文，曹希超，等. 汉源县工业园区硝厂沟泥石流成灾机理及其堆积范围分析[J]. 中国地质灾害与防治学报，2024，35(3): 61-69. DOI: 10.16031/j.cnki.issn.1003-8035.202303026
引用本文: 蓝再成，胡卸文，曹希超，等. 汉源县工业园区硝厂沟泥石流成灾机理及其堆积范围分析[J]. 中国地质灾害与防治学报，2024，35(3): 61-69. DOI: 10.16031/j.cnki.issn.1003-8035.202303026
shu
LAN Zaicheng，HU Xiewen，CAO Xichao，et al. Disaster mechanism and its deposition area of the Xiaochang gully debris flow in Hanyuan County industrial park[J]. The Chinese Journal of Geological Hazard and Control，2024，35(3): 61-69. DOI: 10.16031/j.cnki.issn.1003-8035.202303026
Citation: LAN Zaicheng，HU Xiewen，CAO Xichao，et al. Disaster mechanism and its deposition area of the Xiaochang gully debris flow in Hanyuan County industrial park[J]. The Chinese Journal of Geological Hazard and Control，2024，35(3): 61-69. DOI: 10.16031/j.cnki.issn.1003-8035.202303026
shu

汉源县工业园区硝厂沟泥石流成灾机理及其堆积范围分析

  • 1.

    西南交通大学地球科学与环境工程学院，四川 成都　610031

  • 2.

    中铁第四勘察设计院集团有限公司，湖北 武汉　430061

  • 3.

    西南交通大学高速铁路运营安全空间信息技术国家地方联合工程试验室，四川 成都　610031

基金项目: 国家重点研发计划（2018YCF1505401）；国家自然科学基金项目（41731285）
详细信息
    作者简介:

    蓝再成（1998—），男，辽宁朝阳人，硕士研究生，主要从事工程地质、地质灾害方面的研究。E-mail：lanzc@my.swjtu.edu.cn

    通讯作者:

    胡卸文（1963—），男，博士，教授，博士生导师，主要从事工程地质、环境地质方面的教学与研究工作。E-mail：huxiewen@163.com

  • 中图分类号: P642.23

Disaster mechanism and its deposition area of the Xiaochang gully debris flow in Hanyuan County industrial park

  • 1.

    Faculty of Geosciences and Environment Engineering, Southwest Jiaotong University, Chengdu, Sichuan　610031, China

  • 2.

    China Railway SiyuanI Survey and Design Group Co. Ltd., Wuhan, Hubei　430061,China

  • 3.

    State-Province Joint Engineering Laboratory of Spatial Information Technology for High-Speed Railway Safety, Southwest Jiaotong University, Chengdu, Sichuan　610031, China

摘要

    摘要
  • 摘要:

    受2013年“4•20”芦山地震影响，汉源县白岩河沿岸地质灾害频发。目前硝厂沟流域内存有大量松散物源，具备暴发较大规模泥石流风险，严重威胁沟口汉源工业园区厂矿企业，因此，查明其成灾机理及危害性对今后泥石流预测预警和防治工程设计具有重要意义。文章结合现场勘察、无人机航拍、遥感解译及RAMMS软件，分析了硝厂沟泥石流发育特征，模拟了泥石流运动堆积过程，并在此基础上揭示了其成灾机理。调查研究发现硝厂沟现阶段物源动储量达37×104 m3，其中游发育一段宽缓沟道（长900 m、平均宽度60 m），为天然停淤场，对于小规模泥石流具有拦截作用。数值模拟分析表明在降雨频率小于20年一遇时，泥石流冲出物主要在形成区中游宽缓沟道处停淤堆积，不会对沟口工业园区产生直接危害；在降雨频率达到50年一遇时，硝厂沟将暴发大规模泥石流并冲击淤埋沟口工业园区。

    Abstract:

    Influenced by the 2013“4•20” Lushan earthquake, geological disasters occurred frequently along the Baiyan River Basin in Hanyuan County. At present, there is a large amount of loose material sources in the Xiaochang gully, posing a significant risk of large-scale debris flows, which severely threaten the factories and mining enterprises in the Hanyuan Industrial Park plant. Therefore, understanding the mechanism of disaster occurrence and its hazard is of great significance for future debris flow prediction, early warning, and prevention engineering design. Combining field investigation, UAV aerial photography, remote sensing interpretation, and RAMMS, this study analyzes the development characteristics of debris flows in Xiaochang gully, simulates the process of debris flow movement and accumulation, and reveals the disaster mechanism of disaster occurrence. The results show that the current dynamic storage of the source in Xiaochang gully reaches 370,000 m3. A wide and gentle channel ( 900 m long, and average width of 60 m ) has naturally formed in the middle reaches of the basin, acting as a natural sedimentation pond, which intercepts small-scale debris flows. Numerical simulation results show that when the rainfall frequency is less than once every 20 years, the main deposition of debris flows occurs in the middle and upper reaches of the gully, and will not directly threaten the industrial park; when the rainfall frequency reaches once every 50 years, the outbreak of large-scale debris flow will impact the industrial park.

    • HTML全文

  • 图  1   硝厂沟流域示意图

    Figure  1.   Schematic diagram of the Xiaochang gully

    下载: 全尺寸图片 幻灯片

    图  2   硝厂沟流域纵剖面图

    Figure  2.   Cross-sectional profile plan of the Xiaochang gully

    下载: 全尺寸图片 幻灯片

    图  3   硝厂沟物源分布

    Figure  3.   Distribution of material sources of the Xiaochang gully

    下载: 全尺寸图片 幻灯片

    图  4   汉源县2018年6月30日逐时降雨数据

    Figure  4.   Hourly rainfall data for Hanyuan County on June 30, 2018

    下载: 全尺寸图片 幻灯片

    图  5   硝厂沟20年一遇泥石流泥深模拟结果

    Figure  5.   Simulation results of debris flow depth for 20-year debris flow in Xiaochang gully

    下载: 全尺寸图片 幻灯片

    图  7   两次泥石流沿主沟方向的堆积深度和最大流速曲线

    Figure  7.   The accumulation depth and maximum velocity of the two debris flows along the main gully direction

    下载: 全尺寸图片 幻灯片

    图  6   硝厂沟50年一遇泥石流泥深模拟结果

    Figure  6.   Simulation results of debris flow depth for 50-year debris flow in Xiaochang gully

    下载: 全尺寸图片 幻灯片

    表  1   泥石流动力学特征参数

    Table  1   Dynamic characteristic parameters of debris flow

    特征参数 计算断面 设计频率P/%
    20 10 5 2 1
    流速
    /（m·s−1）    		 主支沟
    交汇处    		 4.34 4.94 5.53 6.11 6.53
    主沟沟口 2.95 3.46 3.73 4.06 4.11
    流量
    /（m3·s−1）    		 主支沟
    交汇处    		 50.83 70.92 91.17 118.25 138.98
    主沟沟口 108.05 158.96 210.87 280.87 334.77
    冲出总量
    （104 m3 ）    		 主支沟
    交汇处    		 1.21 2.25 3.61 6.56 8.81
    主沟沟口 2.57 4.53 6.68 9.79 18.56
    下载: 导出CSV
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    6. 林文华，叶诚耿，王浩. 山区输电塔边坡成灾模式及塔基失效类型. 水利与建筑工程学报. 2019(06): 50-54 . 百度学术

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出版历程
  • 收稿日期:  2023-03-12
  • 修回日期:  2023-06-02
  • 网络出版日期:  2024-05-06
  • 刊出日期:  2024-06-24

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