Geo-engineered buffer capacity of two-layered absorbing system under the impact of rock avalanches based on Discrete Element Method

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2016 > Vol13 No.5

	Geo-engineered buffer capacity of two-layered absorbing system under the impact of rock avalanches based on Discrete Element Method
	Bi Yu-zhang 1,2,3; He Si-ming1,2,3 ; Li Xin-po1,2 ; Wu Yong1,2 ; Xu Qiang 4; Ouyang Chao-jun1,2 ; Su Li-Jun1,2,3 ; Wang Hao 5
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2016-05-01
卷号	13 期号:5 页码:917-929
关键词	Discrete element method Buffer capacity Dynamic simulation Impact force Two layered absorbing system
ISSN号	1672-6316
通讯作者	HE Si-ming
英文摘要	Many rock avalanches were triggered by the Wenchuan earthquake on May 12, 2008 in southwest China. Protection galleries covered with a single soil layer are usually used to protect against rockfall. Since one-layer protection galleries do not have sufficient buffer capacity, a two-layered absorbing system has been designed. This study aims to find whether an expanded poly-styrol (EPS) cushion, which is used in the soil-covered protection galleries for shock absorption, could be positioned under dynamic loadings. The dynamic impacts of the two-layered absorbing system under the conditions of rock avalanches are numerically simulated through a 2D discrete element method. By selecting reasonable parameters, a series of numerical experiments were conducted to find the best combination for the two-layered absorbing system. The values of the EPS layer area as a percentage of the total area were set as 0% (S-1), 22% (S-2), and 70% (S-3). 22% of the area of the EPS layer was found to be a reasonable value, and experiments were conducted to find the best position of the EPS layer in the two-layered absorbing system. The numerical results yield useful conclusions regarding the interaction between the impacting avalanches and the two-layered absorbing system. The soil layer can absorb the shock energy effectively and S-2 (0.4-m thick EPS cushion covered with soil layer) is the most efficient combination, which can reduce the impact force, compared with the other combinations.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	NUMERICAL-SIMULATION ; MODEL ; DEM ; FLOWS ; SOIL
收录类别	SCI
语种	英语
WOS记录号	WOS:000375790800014
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/15133]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2016_Vol13 No.5 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
作者单位	1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China 2.Chinese Acad Sci & Water Resources Minist, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 4.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Peoples R China 5.Fuzhou Univ, Coll Environm & Resources, Fuzhou 350116, Peoples R China
推荐引用方式 GB/T 7714	Bi Yu-zhang,He Si-ming,Li Xin-po,et al. Geo-engineered buffer capacity of two-layered absorbing system under the impact of rock avalanches based on Discrete Element Method[J]. JOURNAL OF MOUNTAIN SCIENCE,2016,13(5):917-929.
APA	Bi Yu-zhang.,He Si-ming.,Li Xin-po.,Wu Yong.,Xu Qiang.,...&Wang Hao.(2016).Geo-engineered buffer capacity of two-layered absorbing system under the impact of rock avalanches based on Discrete Element Method.JOURNAL OF MOUNTAIN SCIENCE,13(5),917-929.
MLA	Bi Yu-zhang,et al."Geo-engineered buffer capacity of two-layered absorbing system under the impact of rock avalanches based on Discrete Element Method".JOURNAL OF MOUNTAIN SCIENCE 13.5(2016):917-929.