High mobility of rock-ice avalanches: Insights from small flume tests of gravel-ice mixtures
文献类型：期刊论文
| 作者 | Yang Qingqing2,3; Su Zhiman1 ; Cheng Qiangong2,3; Ren Yuhao2; Cai Fei4
|
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2019 |
| 卷号 | 260页码:UNSP 105260 |
| 关键词 | Rock-ice avalanche Run-out distance Ice content Flume test |
| ISSN号 | 0013-7952 |
| DOI | 10.1016/j.enggeo.2019.105260 |
| 产权排序 | 3 |
| 通讯作者 | Cheng, Qiangong(chengqiangong@home.swjtu.edu.cn) |
| 文献子类 | Article |
| 英文摘要 | Rock-ice avalanches in cold high-mountain regions have extremely high mobility and enormous destructive potential. As a special material component, ice is supposed to play a crucial role in enhancing the mobility of rock-ice avalanches. A series of small flume tests was performed to quantify the influence of the ice content, initial arrangement, and released mass on the behavior and mobility of gravel-ice mixtures, and to provide insights into the propagation mechanisms of rock-ice avalanches in their initial phase. Test results show that the run-out distance and abrupt-stopping distance increased significantly when the ice content reached 30%. This implies that a certain amount of ice was helpful in enhancing the mobility of rock-ice avalanches. With an ice content higher than 80%, the run-out distances decreased slightly. The run-out distance in the well-mixed case was greater than that in the layered-arrangement cases. Segregation, the phenomenon of ice cubes to tend toward the surface and front of the deposit, was vital for the mobility of gravel-ice mixtures. Segmentation was much more evident with an increase in ice content, which indicates that the deposit was highly dispersed and spreading. This was a key difference in the deposition morphology between cases of gravel-ice mixture and cases of pure gravel or pure ice. Although little meltwater was generated in this study, the development of intergranular water film and suction-induced cohesion caused the particles to pack more closely together and to act as clusters rather than individual particles. This study provides insights into the propagation mechanisms and deposition characteristics of rock-ice avalanches. |
| 电子版国际标准刊号 | 1872-6917 |
| WOS关键词 | MONT-BLANC MASSIF ; GRANULAR AVALANCHES ; RUNOUT ; LANDSLIDE ; GLACIER ; VELOCITY ; FLOW ; MECHANISMS ; MOUNTAINS ; HUASCARAN |
| 资助项目 | National Natural Science Foundation of China[41761144080] ; National Natural Science Foundation of China[41530639] ; National Natural Science Foundation of China[41402244] ; National Natural Science Foundation of China[2019QZKK0906] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000495469800033 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.imde.ac.cn/handle/131551/33570]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 通讯作者 | Cheng Qiangong |
| 作者单位 | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China; 2.Southwest Jiaotong Univ, Fac Geosci & Environm Engn, Chengdu 610031, Sichuan, Peoples R China; 3.Southwest Jiaotong Univ, MOE Key Lab High Speed Railway Engn, Chengdu 610031, Sichuan, Peoples R China; 4.Gunma Univ, Dept Civil & Environm Engn, Kiryu, Gumma 3768515, Japan |
| 推荐引用方式 GB/T 7714 | Yang Qingqing,Su Zhiman,Cheng Qiangong,et al. High mobility of rock-ice avalanches: Insights from small flume tests of gravel-ice mixtures[J]. ENGINEERING GEOLOGY,2019,260:UNSP 105260. |
| APA | Yang Qingqing,Su Zhiman,Cheng Qiangong,Ren Yuhao,&Cai Fei.(2019).High mobility of rock-ice avalanches: Insights from small flume tests of gravel-ice mixtures.ENGINEERING GEOLOGY,260,UNSP 105260. |
| MLA | Yang Qingqing,et al."High mobility of rock-ice avalanches: Insights from small flume tests of gravel-ice mixtures".ENGINEERING GEOLOGY 260(2019):UNSP 105260. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。