IMHE OpenIR  > 山地灾害与地表过程重点实验室
Alternative TitleInfluence of Gradation on the Impact Effect of Landslide Debris Flow
李天话1; 樊晓一1; 姜元俊2
Corresponding Author樊晓一
Source Publication山地学报
Contribution Rank2
Other AbstractThe movement,accumulation,impact of a mobilized landslide debris flow associated with other factors would determine the degree of damage,and its component particles with varied sizes and compositions during the movement involve internal collision,friction,and jumping,etc.,therefore governing the geohazard potential level. Accordingly,it is of great scientific significance to determine the dynamic characteristics and impact force of landslide debris flow in different gradation for structural design of architecture in mountainous area and the planning and prevention work of landslide disaster. By using a three-dimensional discrete element method and comparing with model tests,in this research it took the control grain size (d_(60)) as input and investigated the influence of rocksoil mass with varied grading on the dynamic characteristics such as deposition form,velocity and impact force of landslide debris flow. The results of existing studies suggested that all the processes of migration and accumulation of landslide debris flows simulated by sliding models exhibited significant particle segregation phenomenon,which eventually led to the inverse grading form of landslide deposits. For the initial sliding body with the same control particle size but different grain compositions,although the deposition forms were generally similar,the fine particles actually increased the velocity of the sliding body while the large grains increased the impact force of the sliding body; Under different control particle sizes,the larger the control particle size for a sliding body,it had the stronger flowability,and similarly the greater the average velocity,the higher the peak impact force. It can conclude that the segregation of fine particles compositions would increase the kinetic energy of a sliding body, while its frictional energy dissipation would significantly reduce the impact energy of landslide debris flow. The collision and segregation of coarse grains compositions could promote the energy transfer inside the sliding body and increase the impact force of landslide debris flow.
Keyword滑坡碎屑流  颗粒级配  反序现象  冲击力
Indexed ByCSCD
Citation statistics
Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
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GB/T 7714
李天话,樊晓一,姜元俊. 岩土体颗粒级配对滑坡碎屑流冲击作用的影响研究[J]. 山地学报,2018,36(2):289-297.
APA 李天话,樊晓一,&姜元俊.(2018).岩土体颗粒级配对滑坡碎屑流冲击作用的影响研究.山地学报,36(2),289-297.
MLA 李天话,et al."岩土体颗粒级配对滑坡碎屑流冲击作用的影响研究".山地学报 36.2(2018):289-297.
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