[1]王毅,周勇,余业.毛家湾隧道口沟泥石流形成机制及发展趋势研究[J].自然灾害学报,2017,(06):120-128.[doi:10.13577/j.jnd.2017.0614]
 WANG Yi,ZHOU Yong,YU Ye.Study on formation mechanism and development trend of Maojiawan tunnel ditch debris flow[J].,2017,(06):120-128.[doi:10.13577/j.jnd.2017.0614]
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毛家湾隧道口沟泥石流形成机制及发展趋势研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2017年06期
页码:
120-128
栏目:
出版日期:
2017-12-08

文章信息/Info

Title:
Study on formation mechanism and development trend of Maojiawan tunnel ditch debris flow
作者:
王毅1 周勇1 余业2
1. 核工业西南勘察设计研究院, 四川 成都 610061;
2. 四川省地矿局九一五水文地质工程地质队, 四川 眉山 620010
Author(s):
WANG Yi1 ZHOU Yong1 YU Ye2
1. Nuclear Industry Southwest Survey & Design Institute, Chengdu 610061, China;
2. 915 Hydrogeology Engineering Geological Team of Sichuan Geology and Mineral Resources Bureau, Meishan 620010, China
关键词:
泥石流形成机制发展趋势运动-堆积特征
Keywords:
debris flowformation mechanismdevelopment trendmovement-accumulation characteristics
分类号:
TU4;X9;X43
DOI:
10.13577/j.jnd.2017.0614
摘要:
2010年8月14日、2011年7月3日,G213线都(江堰)汶(川)路段毛家湾隧道口沟经历了两次规模较大的泥石流。泥石流携带的大量固体物质没有冲出沟口,而是淤积于主沟沟床,逐次向下游推进。由于该沟流域面积小、沟长短、纵坡大、沟道较顺直,因此产生上述现象,着实令人费解。笔者通过深入调查、多年跟踪研究,从毛家湾隧道口沟所处的地质环境入手,分析了泥石流的形成条件,及其与强震、强降雨的关系,泥石流的运动与沟床物质组成的关系;初步揭示了泥石流的运动-堆积特征及形成机制。提出了一次泥石流运动过程中具有"紧急刹车"的现象,以及多次泥石流具有"逐次推移"的发展模式,对防治具有类似特点的泥石流灾害具有借鉴价值。
Abstract:
Maojiawan tunnel entrance, a section of Du (Dujiangyan)-Wen(Wenchuan) highway, endured two large-scale debris flows respectively on August 14, 2010 and July 3, 2011. Oddly, the large number of solid materials did not rush out, on the contrary, deposited in the gully. This phenomenon is very strange for debris flow happened in this kind of topographic feature with small valley area, short length, large longitudinal grade and straight channel. Through in-depth investigation and follow-up research for many years, based on geological environment of the study area, the author firstly analyzed formation conditions of debris flows and its relationship with strong earthquake and heavy rainfall, and secondly analyzed the relationship between movement feature of debris and composition of gully bed. As a result, this paper preliminarily reveals formation mechanism, movement and accumulation characteristics of debris flows in the gully. The novelty of this study lies in the finding of phenomenon of "emergency brake" in the process of movement and gradually push of multi-stage debris flows. This paper has reference value to prevent and control debris flow disasters with similar characteristics.

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备注/Memo

备注/Memo:
收稿日期:2016-10-10;改回日期:2017-06-01。
作者简介:王毅(1985-),男,工程师,硕士,主要从事岩土工程、地质灾害防治勘察(查)、设计工作.E-mail:wwyywangyi@163.com
更新日期/Last Update: 1900-01-01