年廷凯, 沈月强, 郑德凤, 等. 2021. 海底滑坡链式灾害研究进展[J].工程地质学报, 29(6): 1657-1675. doi: 10.13544/j.cnki.jeg.2021-0815.
    引用本文: 年廷凯, 沈月强, 郑德凤, 等. 2021. 海底滑坡链式灾害研究进展[J].工程地质学报, 29(6): 1657-1675. doi: 10.13544/j.cnki.jeg.2021-0815.
    Nian Tingkai, Shen Yueqiang, Zheng Defeng, et al. 2021. Research advances on the chain disasters of submarine landslides[J].Journal of Engineering Geology, 29(6): 1657-1675. doi: 10.13544/j.cnki.jeg.2021-0815.
    Citation: Nian Tingkai, Shen Yueqiang, Zheng Defeng, et al. 2021. Research advances on the chain disasters of submarine landslides[J].Journal of Engineering Geology, 29(6): 1657-1675. doi: 10.13544/j.cnki.jeg.2021-0815.

    海底滑坡链式灾害研究进展

    RESEARCH ADVANCES ON THE CHAIN DISASTERS OF SUBMARINE LANDSLIDES

    • 摘要: 我国海洋能源开发已步入深远海域,面临的深海地质灾害问题也日益凸显,尤以海底滑坡最为典型,一旦发生将会形成链式灾害,严重危害水下基础设施的安全。本文聚焦“滑坡形成→运动演化→冲击设施”这一链式灾害过程,首先梳理了不同触发因素作用下海底滑坡的形成机制,进而论述了海底滑坡的运动过程及不同演化阶段的判识标准,分析了滑坡运动演化过程中环境水与土体的耦合作用机理,提出了适用于中小尺度运动演化过程的流固耦合分析方法,并探讨了当前海底滑坡运动演化过程试验模拟技术和原位监测手段的适用范畴与技术瓶颈;进一步地,针对滑坡冲击海底管缆等水下基础设施问题,评析了海底滑坡冲击效应的量化评估方法和研究手段。最后,指出当前海底滑坡链式灾害研究存在的不足和未来的发展方向,以期为海底滑坡地质灾害链的模拟、预测和预警等提供重要参考。

       

      Abstract: The problems of deep-water geohazards encountered by human being have become increasingly prominent as the marine resources and energies development has gradually moved into the deep sea. Among them,submarine landslide is the most typical one because it will lead to the chain disasters and seriously endanger the safety of underwater infrastructure. To such end,this paper focuses on the chain disasters process from landslide formation to movement evolution until impact on infrastructures. First of all,the formation mechanism of submarine landslides in response to various triggering factors is briefly reviewed,and the movement process of submarine landslides and the criteria for identifying different evolutionary stages are stated in depth. Then,the mechanism of environmental water and soil coupling action in the process of landslide movement evolution is examined,and a coupled CFD-DEM method applicable to the mesoscale and small scale movement evolution process is proposed. Furthermore,the current application scope and technical bottleneck of the experimental modelling technology,and in-situ monitoring methods of submarine landslide movement evolution process are enough discussed. Based on this,the quantitative evaluation methods and research tools of submarine landslide impact effects are summarized,with a focus on the problem of landslide impact on underwater infrastructure such as submarine pipelines and cables. Finally,the current research deficiencies and future development directions in the subject of submarine landslides,are pointed out to provide a useful reference for simulation,prediction,and early warning of submarine landslide disaster chains.

       

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