沟道堆积体失稳破坏引发泥石流的起动机理研究进展  

Research progress on initiation mechanism of debris flow triggered by the destabilisation of gully loose deposits

作　　者：周易辰 陈华勇[1,2,3] 阮合春 李霄 俞昀晗[1,2,3] 牟芸莹 孟昊阳 ZHOU Yichen;CHEN Huayong;RUAN Hechun;LI Xiao;YU Yunhan;MOU Yunying;MENG Haoyang(State Key Laboratory of Mountain Hazards and Engineering Safety,Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610299,China;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610299,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Earth Science and Engineering,Hebei University of Engineering,Handan 056038,China)

机构地区：[1]中国科学院、水利部成都山地灾害与环境研究所,山地自然灾害与工程安全全国重点实验室,四川成都610299 [2]中国科学院、水利部成都山地灾害与环境研究所,四川成都610299 [3]中国科学院大学,北京100049 [4]河北工程大学地球科学与工程学院,河北邯郸056038

出　　处：《自然灾害学报》2024年第5期1-11,共11页Journal of Natural Disasters

基　　金：国家自然科学基金项目(U21A2008,U20A20112);中国科学院“西部之光”人才培养计划项目;中国科学院、水利部成都山地灾害与环境研究所科研项目(IMHE-ZDRW-02)。

摘　　要：地震引发的崩塌、滑坡等次生灾害在沟道中形成的松散堆积体,在强降雨作用下发生失稳破坏,引发规模庞大的泥石流。对该类泥石流进行系统地研究并揭示其起动机理和破坏规律,能够为我国西南地区泥石流防治工程提供一定的理论参考。因此,基于现阶段的国内外研究现状,重点分析了沟道堆积体稳定性影响因素,梳理了4种失稳破坏模式,凝练出了2种沟道堆积体的起动机理,并以水力类泥石流的观点归纳总结了三类沟道堆积体失稳破坏引发泥石流的临界起动模型。最后,由于沟道堆积体失稳破坏引发的泥石流起动过程本身的复杂性,基于对现有成果的不足分析,提出了该类泥石流涉及的3个重难点科学问题。Seismic-induced secondary disasters,such as collapses and landslides,generate loose deposits in gullies.Under the influence of intense rainfalls,these deposits can become destabilized and lead to the initiation of large-scale debris flow.The systematic study of this type of debris flow and the revelation of its initiation mechanism and destruction law can provide certain theoretical references for the debris flow prevention and control project in the southwest region in China,where such events are particularly prevalent.Therefore,based on the current state of domestic and international research,this study focuses on analyzing the factors affecting the stability of gully deposits,categorizes four destabilisation types,distills the initiation mechanism of two types of gully deposits,and summarizes three types of critical initiation models for debris flow triggered by the destabilisation of gully deposits from the perspective of hydrologic debris flows.Finally,due to the complexity of the initiation process of debris flow triggered by the destabilisation of gully deposits,three critical scientific issues involved in this type of debris flow are proposed based on the analysis of the shortcomings of the existing results.

关 键 词：沟道堆积体 失稳破坏 泥石流 起动机理 临界模型 

分 类 号：TU42[建筑科学—岩土工程] P642.23[建筑科学—土工工程] X43[天文地球—工程地质学]