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Numerical investigation of effects of "baffles - deceleration strip" hybrid system on rock avalanches
Bi Yu-zhang1,2; He Si-ming3,4,5,6; Du Yan-jun1,2; Shan Jie1,2; Yan Shuai-xing4,5; Wang Dong-po7; Sun Xin-po8
Corresponding AuthorBi Yu-zhang(biyuzhang@seu.edu.cn) ; Sun Xin-po(xinpo2008@sina.com.cn)
2019-02-01
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume16Issue:2Pages:414-427
AbstractArrays 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.
KeywordRock avalanches Baffles Hybrid system Energy dissipation Impact force
DOI10.1007/s11629-018-4908-3
Indexed BySCI
WOS KeywordIMPACT ; FLOWS
Language英语
Funding ProjectMajor Program of the National Natural Science Foundation of China[41790433] ; Major Program of the National Natural Science Foundation of China[41772312] ; Major Program of the National Natural Science Foundation of China[41472325] ; NSFC-ICIMOD Collaborative Project[41661144041] ; Key Research and Development Projects of Sichuan Province[2017SZ0041] ; Scientific Research Foundation of Graduate School of Southeast University[YBJJ 1844] ; Postgraduate Research & Practice Innovation Program of Jiangsu Province[KYCX17_0130]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000458657000013
Funding OrganizationMajor 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
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/25195
Collection中国科学院水利部成都山地灾害与环境研究所
Corresponding AuthorBi Yu-zhang; Sun Xin-po
Affiliation1.Southeast Univ, Inst Geotech Engn, Nanjing 210096, Jiangsu, Peoples R China
2.Southeast Univ, Sch Transportat, Nanjing 210096, Jiangsu, Peoples R China
3.Chinese Acad Sci, Key Lab Mt Hazards & Surface Proc, Chengdu 610041, Sichuan, Peoples R China
4.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China
5.Chinese Acad Sci, Ctr Excellence Tibet Plateau Earth Sci, Beijing 100101, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
7.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Sichuan, Peoples R China
8.Sichuan Univ Sci & Engn, Coll Civil Engn, Zigong 643000, Peoples R China
Recommended Citation
GB/T 7714
Bi Yu-zhang,He Si-ming,Du Yan-jun,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 Yu-zhang.,He Si-ming.,Du Yan-jun.,Shan Jie.,Yan Shuai-xing.,...&Sun Xin-po.(2019).Numerical investigation of effects of "baffles - deceleration strip" hybrid system on rock avalanches.JOURNAL OF MOUNTAIN SCIENCE,16(2),414-427.
MLA Bi Yu-zhang,et al."Numerical investigation of effects of "baffles - deceleration strip" hybrid system on rock avalanches".JOURNAL OF MOUNTAIN SCIENCE 16.2(2019):414-427.
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