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
周易辰 1陈华勇 1阮合春 1李霄 1俞昀晗 1牟芸莹 1孟昊阳2
作者信息
- 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;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;中国科学院大学,北京 100049
- 2. 河北工程大学 地球科学与工程学院,河北 邯郸 056038
- 折叠
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.
Abstract
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Key words
gully deposits/destabilisation/debris flow/initiation mechanism/critical model引用本文复制引用
基金项目
国家自然科学基金项目(U21A2008)
国家自然科学基金项目(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)
出版年
2024
NETL
NSTL
万方数据