Effects of new baffles system under the impact of rock avalanches

doi:10.1016/j.enggeo.2019.105261

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

	Effects of new baffles system under the impact of rock avalanches
	Wang, Dongpo 6; Li, Qinze 6; Bi, Yuzhang 4,5; He, Siming 1,2,3
刊名	ENGINEERING GEOLOGY
	2020
卷号	264 页码:105261
关键词	Rock avalanches Flume modeling New baffles system Energy dissipation
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2019.105261
产权排序	4
文献子类	Article
英文摘要	To reduce the flow energy of rockfall in rmountain area, a baffle array is set up in the protection zone. The optimized design can enhance the efficiency of hazard source energy dissipation project. In the present study, the arc-shaped baffles were studied as compared with the conventional baffles (square baffles and cylindrical baffles) based on practical engineering. The comparison of three types of baffles was discussed in detail by experimental studies, which primarily focused on the blocking ability and effectivity. In particular, by determining the optimal case using those different types of baffles, the effects of the optimization of baffle system [column spacing, row spacing and Ld (distance between first baffle row and chute terminal)] were investigated. According to the results, the arc-shaped baffle is the best case among those three types of baffle, i.e. the deposit area and runout are all shorter than those of any other cases with the same value of Sr. Shape changing (cylindrical to arc-shaped) will up-regulate the fragment blockage degree; the following avalanches will take place close to the avalanche deposition, leading to a huge dissipation of kinetic energy. Moreover, by comparing deposition, dimensionless velocity (U*) and velocity reduction ratio (VRR), arc-shaped baffle system showed competitive blocking ability when Sc = 3.5 and Sr = 4.5. With the rise in the Ld, the energy dissipation efficiency can be enhanced through the particle collision and particle friction during the geo-disaster movement. Furthermore, it can effectively narrow the deposit area and reduce deposit depth and deposit width. The results obtained from this study are useful for facilitating design of baffles against rock avalanches.
电子版国际标准刊号	1872-6917
资助项目	Natural Science Foundation of China[41790433] ; Natural Science Foundation of China[41877266] ; National Key R&D Program of China[2017YFC1501003] ; State Key Laboratory of Geohazard Prevention and Geo-environment Protection Independent Research Project[SKLGP2016Z014] ; Scientific Research Foundation of Graduate School of Southeast University ; Postgraduate Research&Practice Innovation Program of Jiangsu Province[KYCX17_0130]
WOS关键词	GRANULAR FLOW ; LANDSLIDE HAZARD ; DRY AVALANCHES ; DEBRIS ; MOTION ; SLOPE
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000513985500035
资助机构	Natural Science Foundation of China ; National Key R&D Program of China ; State Key Laboratory of Geohazard Prevention and Geo-environment Protection Independent Research Project ; Scientific Research Foundation of Graduate School of Southeast University ; Postgraduate Research&Practice Innovation Program of Jiangsu Province
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/34054]
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	Bi, Yuzhang
作者单位	1.Chinese Acad Sci, Key Lab Mt Hazards & Surface Proc, Chengdu 610041, Peoples R China; 2.Chinese Acad Sci, Ctr Excellence Tibet Plateau Earth Sci, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China; 4.Southeast Univ, Sch Transportat, Nanjing 210096, Jiangsu, Peoples R China; 5.Southeast Univ, Inst Geotech Engn, 2 Sipalou Rd, Nanjing 210096, Jiangsu, Peoples R China; 6.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Sichuan, Peoples R China;
推荐引用方式 GB/T 7714	Wang, Dongpo,Li, Qinze,Bi, Yuzhang,et al. Effects of new baffles system under the impact of rock avalanches[J]. ENGINEERING GEOLOGY,2020,264:105261.
APA	Wang, Dongpo,Li, Qinze,Bi, Yuzhang,&He, Siming.(2020).Effects of new baffles system under the impact of rock avalanches.ENGINEERING GEOLOGY,264,105261.
MLA	Wang, Dongpo,et al."Effects of new baffles system under the impact of rock avalanches".ENGINEERING GEOLOGY 264(2020):105261.