狭陡型泥石流成灾特征与防治对策研究——以阿坝州金川县刘家沟泥石流为例
投稿时间:2022-07-22  修订日期:2022-09-24  点此下载全文
引用本文:崔华丽,杨东旭,杨栋,等.狭陡型泥石流成灾特征与防治对策研究——以阿坝州金川县刘家沟泥石流为例[J].钻探工程,2022,49(6):122-129.
CUI Huali,YANG Dongxu,YANG Dong,et al. Disaster characteristics and prevention measures of narrow-steep debris flow—A case study of Liujia gully in Jinchuan county, Aba prefecture, Sichuan province[J]. Drilling Engineering, 2022,49(6):122-129.
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作者单位E-mail
崔华丽* 中国地质科学院探矿工艺研究所四川 成都 611734
成都华建地质工程科技有限公司四川 成都 611734 
huali8831@126.com 
杨东旭 中国地质科学院探矿工艺研究所四川 成都 611734  
杨栋 中国地质科学院探矿工艺研究所四川 成都 611734
成都华建地质工程科技有限公司四川 成都 611734 
 
李元灵 中国地质科学院探矿工艺研究所四川 成都 611734  
贾逸 中国地质科学院探矿工艺研究所四川 成都 611734
成都华建地质工程科技有限公司四川 成都 611734 
 
吴波* 中国地质科学院探矿工艺研究所四川 成都 611734
成都华建地质工程科技有限公司四川 成都 611734 
 
基金项目:国家科技重大专项“第二次青藏高原综合科学考察研究”(编号:2019QZKK0902)
中文摘要:刘家沟位于四川省阿坝州金川县,是一条狭陡型高频泥石流沟,每年雨季,降雨激发泥石流灾害链。本文在野外调查和实地勘测的基础上,分析认为,受汶川MS8.0地震扰动,刘家沟形成流通区单位面积上松散固体物质达98.11×104 m3,在409.8‰的平均纵坡降下,泥石流活动频率明显增强,泥石流沿程放大效应明显,最终形成了降雨+径流侵蚀-滑坡-堰塞体-堰塞体溃决-增大的泥石流-堵河形成堰塞湖-卡撒沟中、下游损害的灾害链。提出采用格宾石笼进行固坡护床,结合拦挡坝拦粗排细的作用,根据保护对象设置防护堤,优化排导槽与主河交汇条件的综合治理措施,可为小流域高频狭陡型泥石流灾害的治理提供参考。
中文关键词:狭陡型泥石流  灾害链  堵河  格宾石笼  拦挡坝  刘家沟泥石流
 
Disaster characteristics and prevention measures of narrow-steep debris flow—A case study of Liujia gully in Jinchuan county, Aba prefecture, Sichuan province
Abstract:Liujia gully is a narrow-steep and high-frequency debris flow gully which is located in Jinchuan county, Aba Prefecture, Sichuan Province. Every raining season,rainfall will lead to debris flow disaster chains. In this paper, the author analyzes the characteristics and the environment of debris flow on the basis of field investigation and field survey. Debris flow parameters under different rainfall frequency are calculated by the rain flood method. The paper also analyzes the possibility of debris flow blocking the main river (Kasa gully) to provide the volume weight required. Many difficulties in treatment of debris flow in narrow-steep gullies and are discussed with the case-dependent measures. The Wenchuan earthquake induced a great mass of collapse and landslide with unit-area loose solid materials in Liujia gully up to 98.11×104 m3, and debris flow happened at higher frequency and amplifed volume at the average longitudinal slope of 409.8‰ leading to the formation of the valley disaster chain consisting of rain + runoff erosion-landslide-landslide dam-weir burst-increasing debris flow-barrier lake-hazardous Kasa gullies. To solve the disaster, we suggest comprehensive treatment measures which include using Gabion stone cage to stabilize the slope and the gully, construction of retaining dams and drainage canals. They can provide reference for treatment of high-frequency narrow steep debris flow disasters in small watersheds.
keywords:narrow-steep debris flow  disaster chain  blocking river  Gabion gabion  retaining dam  Liujia gully debris flow
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