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High mobility of rock-ice avalanches: Insights from small flume tests of gravel-ice mixtures
Yang Qingqing1,2; Su Zhiman3; Cheng Qiangong1,2; Ren Yuhao1; Cai Fei4
Corresponding AuthorCheng, Qiangong(chengqiangong@home.swjtu.edu.cn)
2019
Source PublicationENGINEERING GEOLOGY
ISSN0013-7952
EISSN1872-6917
Volume260Pages:UNSP 105260
SubtypeArticle
Contribution Rank3
AbstractRock-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.
KeywordRock-ice avalanche Run-out distance Ice content Flume test
DOI10.1016/j.enggeo.2019.105260
Indexed BySCI
WOS KeywordMONT-BLANC MASSIF ; GRANULAR AVALANCHES ; RUNOUT ; LANDSLIDE ; GLACIER ; VELOCITY ; FLOW ; MECHANISMS ; MOUNTAINS ; HUASCARAN
Language英语
Funding ProjectNational 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 Research AreaEngineering ; Geology
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000495469800033
Funding OrganizationNational Natural Science Foundation of China
PublisherELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/33570
Collection山地灾害与地表过程重点实验室
Corresponding AuthorCheng Qiangong
Affiliation1.Southwest Jiaotong Univ, Fac Geosci & Environm Engn, Chengdu 610031, Sichuan, Peoples R China;
2.Southwest Jiaotong Univ, MOE Key Lab High Speed Railway Engn, Chengdu 610031, Sichuan, Peoples R China;
3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China;
4.Gunma Univ, Dept Civil & Environm Engn, Kiryu, Gumma 3768515, Japan
Recommended Citation
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.
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