IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2011  > Vol8 No.2
Analysis on the dynamical process of Donghekou rockslide-debris flow triggered by 5.12 Wenchuan earthquake
Sun Ping; Zhang Yongshuang; Shi Jusong; Chen Liwei
Corresponding AuthorSun, P
2011-04
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume8Issue:2Pages:140–148
AbstractAmong the geo-hazards caused by the great Wenchuan Earthquake, the rapid and long runout rockslide-debris flow is of primary concern due to the large volume of displaced material and the resultant catastrophic impacts to the landscape and socioeconomic structure. In order to analyze the dynamical process of this kind of geo-hazard, the Donghekou rockslide-debris flow is given as an example in this paper. This event, which killed 780 people, initiated at an elevation of 1300 m with a total long run-out distance of more than 2400 m. The slide mass is mainly composed of dolomite limestone and siliceous limestone of Sinian system, together with carbon slate and phyllite of Cambrian. During the processes from slide initiation to the final cessation of slide movement, five dynamic stages took place, here identified as the initiation stage, the acceleration of movement stage, the air-blast effect stage, the impact and redirection stage and the long runout slidematerial accumulation stage. Field investigations indicate that due to the effects of the earthquake, the dynamics of the Donghekou rockslide-debris flow are apparently controlled by geologic and tectonic conditions, the local geomorphological aspects of the terrain, and the microstructural and macroscopic mechanical properties of rocks which compose the slide mass. These three main factors which dictate the Donghekou rockslide-debris flow dynamics are discussed in detail in this paper, and significant results of field investigations and tests of materials are presented. The above dynamical processes are analyzed in this paper, and some useful conclusions have been gained.
KeywordDynamical Process Donghekou Rockslide-debris Flow Wenchuan Earthquake
Language英语
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/5817
CollectionJournal of Mountain Science_Journal of Mountain Science-2011_Vol8 No.2
Recommended Citation
GB/T 7714
Sun Ping,Zhang Yongshuang,Shi Jusong,et al. Analysis on the dynamical process of Donghekou rockslide-debris flow triggered by 5.12 Wenchuan earthquake[J]. JOURNAL OF MOUNTAIN SCIENCE,2011,8(2):140–148.
APA Sun Ping,Zhang Yongshuang,Shi Jusong,&Chen Liwei.(2011).Analysis on the dynamical process of Donghekou rockslide-debris flow triggered by 5.12 Wenchuan earthquake.JOURNAL OF MOUNTAIN SCIENCE,8(2),140–148.
MLA Sun Ping,et al."Analysis on the dynamical process of Donghekou rockslide-debris flow triggered by 5.12 Wenchuan earthquake".JOURNAL OF MOUNTAIN SCIENCE 8.2(2011):140–148.
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