| 基于数值模拟的强震区典型泥石流堵江模式分析 |
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| 引用本文： | 常鸣, 唐川, 宋志, 杨晨源. 2016: 基于数值模拟的强震区典型泥石流堵江模式分析. 工程地质学报, 24(s1): 622-629. DOI: 10.13544/j.cnki.jeg.2016.s1.090 |
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| 作者姓名： | 常鸣 唐川 宋志 杨晨源 |
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| 作者单位： | 1.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 成都 610059;;2.中国地质调查局成都地质调查中心 成都 610081 |
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| 基金项目： | 国家重点实验室自主研究课题：强震区典型城镇泥石流定量风险评价研究（SKLGP2015Z018），高等学校博士学科点专项基金：汶川震区滑坡泥石流演化规律与活动规律预测研究（20125122130001）资助 |
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| 摘 要： | 受512汶川强震影响，大量崩滑体出现在震中岷江流域，伴随极端降雨天气它们逐步转化为泥石流灾害。2011年7月3日，受强降雨影响震中附近高家沟暴发泥石流，完全摧毁沟口地物，并且部分堵塞岷江，严重威胁高速公路隧道入口及国道。为了减少强震区泥石流堵江带来的损失，本文选取强震区岷江流域高家沟泥石流作为研究对象，采用数值模拟的方法，模拟不同降雨强度下（5a、20年、50a、100年）高家沟泥石流的运动特征，进而分析其不同程度的堵江模式。经过野外验证2011a73高家沟泥石流数值模拟精度可达81.4%，模拟结果表明，高家沟泥石流5年一遇降雨条件下没有松散堆积物冲出，20年一遇降雨条件下虽有部分松散堆积物进入岷江但未形成堵江，50年一遇降雨条件下则出现部分堵断岷江现象，100年一遇降雨条件下则完全堵塞岷江。该研究结果将为今后强震区泥石流堵江判识及监测预警提供科学依据。
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| 关 键 词： | 高家沟泥石流 堵江模式 数值模拟 降雨强度 |
| 收稿时间： | 2016-02-25 |
| 修稿时间： | 2016-05-20 |
TYPICAL DEBRIS FLOW BLOCKING RIVER PATTERN ANALYSIS BASED ON THE NUMERICAL SIMULATION |
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| CHANG Ming, TANG Chuan, SONG Zhi, YANG Chenyuan. 2016: TYPICAL DEBRIS FLOW BLOCKING RIVER PATTERN ANALYSIS BASED ON THE NUMERICAL SIMULATION. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 622-629. DOI: 10.13544/j.cnki.jeg.2016.s1.090 |
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| Authors: | CHANG Ming TANG Chuan SONG Zhi YANG Chenyuan |
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| Affiliation: | 1.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059;;2.Chengdu Center of China Geological Survey, Chengdu 610081 |
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| Abstract: | A large number of landslides were produced in the Minjiang River near the epicenter by Wenchuan earthquake. With extreme rainfall weather, debris flows gradually become the main secondary disasters after earthquake. On 3th July 2011,debris flow occurred in Gaojia debris flow under rainstorm condition, destroying woodland, burying old road, almost blocking Minjiang River, and affecting seriously the reconstruction of the tunnel entrance. In order to decrease the losses of blocking river by debris flow in intense seismic area, this article selects Gaojia debris flow in Minjiang river as the research object. Numerical simulation was adopt to simulate Gaojia debris flow movement under different rainfall intensity(5 years, 20 years, 50 years, 100 years), and further analysis the different levels of blocking river pattern. The numerical simulation accuracy can reach 81.4%by field validation. The results show that there are no loose material run out under the condition of 5years rainfall intensity, failed to plugging river in 20 years rainfall intensity, partially blocking river in 20 years rainfall intensity, and completely blocking the river under the condition of 100 years rainfall intensity. |
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| Keywords: | Gaojia gully Blocking river Numerical simulation Rainfall frequency |
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