Numerical investigation of effects of \baffles - deceleration strip\ hybrid system on rock avalanches

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 > 山地灾害与地表过程重点实验室

	Numerical investigation of effects of \baffles - deceleration strip\ hybrid system on rock avalanches
	Bi Yuzhang 2; He Siming 4; Du Yanjun 2; Shan Jie 2; Yan Shuaixing 5; Wang Dongpo 8; Sun Xinpo 1
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2019
卷号	16 期号:2 页码:414-427
关键词	IMPACT FLOWS Rock avalanches Baffles Hybrid system Energy dissipation Impact force
ISSN号	1672-6316
英文摘要	Arrays of baffles are usually installed in front of protection site to attenuate the flow energy of rock avalanches in mountainous areas. Optimization design is crucial for efficiency promotion in hazard energy dissipation engineering. In this study, a deceleration strip was added in the baffles protection system to optimize the traditional baffles system. The effects of the "baffles - deceleration strip" hybrid protection system was discussed in detail with the nails number and nails angle. This study presents details of numerical experiments using the discrete element method (DEM). The effect of the optimization of hybrid protection system (nail angle and nail number) were investigated specifically, especially the impact force that avalanches exerted on structures. The results show that the maximum impact forces and kinetic energy of the rock avalanches decreases with the increase of the number and angle of the nail. Moreover, the distance between the toe and the bearing structure (L-m) is also a key factor. The shorter the distance L-m (30m) is, the higher the maximum impact force are. The longer the distance L-m (70m) is, the lower the maximum impact force are. Under the same size of the nails, increasing the numbers can enhance the dissipation ability of the hybrid protection system. Meanwhile, increasing its angle can also enhance the dissipation ability. There are three key ways for nails attenuate rock avalanches: (i) block the fine particles directly; (ii) form the particles bridge between nails and baffles; (iii) dissipate the coarse particles energy directly. The effect of segregation in rock avalanches is crucial for the energy dissipation mechanism, which is a key factor to optimize the traditional baffle system.
资助项目	[Major Program of the National Natural Science Foundation of China] ; [NSFC-ICIMOD Collaborative Project] ; [Key Research and Development Projects of Sichuan Province] ; [Scientific Research Foundation of Graduate School of Southeast University] ; [Postgraduate Research & Practice Innovation Program of Jiangsu Province]
语种	英语
CSCD记录号	CSCD:6434861
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/55568]
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
作者单位	1.四川大学 2.中国科学院南京地理与湖泊研究所 3.东南大学 4.中国科学院水利部成都山地灾害与环境研究所 5.中国科学院 6.Chinese Acad Science, Ctr Excellence Tibet Plateau Earth Science, Beijing 100101, Peoples R China Ctr Excellence Tibet Plateau Earth Science 7.中国科学院大学 8.成都学院
推荐引用方式 GB/T 7714	Bi Yuzhang,He Siming,Du Yanjun,et al. Numerical investigation of effects of \baffles - deceleration strip\ hybrid system on rock avalanches[J]. JOURNAL OF MOUNTAIN SCIENCE,2019,16(2):414-427.
APA	Bi Yuzhang.,He Siming.,Du Yanjun.,Shan Jie.,Yan Shuaixing.,...&Sun Xinpo.(2019).Numerical investigation of effects of \baffles - deceleration strip\ hybrid system on rock avalanches.JOURNAL OF MOUNTAIN SCIENCE,16(2),414-427.
MLA	Bi Yuzhang,et al."Numerical investigation of effects of \baffles - deceleration strip\ hybrid system on rock avalanches".JOURNAL OF MOUNTAIN SCIENCE 16.2(2019):414-427.