水利水电技术（中英文）2024，Vol.55Issue(1)：157-166,10.DOI:10.13928/j.cnki.wrahe.2024.01.014
河流作用下堵江滑坡运动特征差异性研究
Study on the difference of movement characteristics of river blocking landslide under river action
摘要
Abstract
[Objective]The water effect often plays a vital role during the process of deformation,movement,and accumulation of a landslide.It is nesessary to study the influence of river flow on landslide accumulation,river blockage and dam formation,from the perspective of hydraulics.[Methods]This paper focuses on the differences of sliding speed,energy and morphological characteristics in the process of landslide evolution with or without the action of river.According to the basic data of the Baige landslide in 2018,the DEM simulation and the CFD-DEM simulation of the landslide are carried out to simulate the landslide movement considering the two cases without or with river effect,respectively.[Results]According to the calculation of veloci-ty,energy and morphological characteristics,the specific influence of river flow on the landslide is quantitatively revealed.[Conclusion]The result show that:(1)The river has a small influence on the landslide mass due to the relatively shallow river depth,and the river velocity has almost none influence on the landslide movement;however,the averaged velocity of landslide mass under river action is less than that under no river action.(2)The kinetic energy and strain energy are more obviously affected by the river in the high-speed movement stage of the landslide.The gravity potential energy and energy loss are more obviously affected by river in the landslide accumulation stage.The influence of river on the strain energy of Baige landslide is the largest,which is 1.80％.(3)The influence of the river on the landslide size concentrates on the sectional width;the sectional width under no river action varies near 1.7 km,while sectional width under river action varies near 1.5km at 70 s after the slope failure.The simulation result considering the influence of river flow are in good agreement with the actual situation.关键词
地质灾害/白格滑坡/河流作用/流固耦合/运动特征/变形/数值模拟Key words
geological disaster/Baige landslide/river effect/liquid-solid coupling/landslide movement characteristics/deform-ation/numerical simulation分类
天文与地球科学引用本文复制引用
王昌奎,陈正峰,巨广宏,袁星宇,钱瑞,符文熹..河流作用下堵江滑坡运动特征差异性研究[J].水利水电技术（中英文）,2024,55(1):157-166,10.基金项目
国家自然科学基金项目(42107172) （42107172）
四川省重点研发项目(2022YFN0023,2021YFN0126) （2022YFN0023,2021YFN0126）
