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Experimental study on a debris-flow drainage channel with different types of energy dissipation baffles
Wang, Fei1,3; Chen, Xiaoqing1,2; Chen, Jiangang1; You, Yong1
Corresponding AuthorXiaoqing Chen
2017
Source PublicationENGINEERING GEOLOGY
ISSN0013-7952
EISSN1872-6917
Volume220Pages:43-51
SubtypeArticle
Abstract

Debris-flow deceleration baffles can effectively reduce debris-flow velocity and hence reduce the impact of flowing debris on architectural structures in mountainous areas. In this study, baffles with three different shapes were developed to investigate the velocity reduction effect and energy dissipation characteristics in a 6-m-long flume. The influences of debris-flow density, baffle shape, and row spacing were investigated. The debris-flow velocity was measured to calculate the velocity reduction ratio, which was influenced by the above variables. Experimental results reveal that the arrangement consisting of three rows of staggered baffles can reduce the velocity by 27.30%-39.32% compared to velocity reduction ratio of the controlled trials, wherein the flume bottom is empty. The velocity reduction ratio increases with an increase in the density; increasing the density from 1200 to 2100 kg/m(3) can lead to a 20% increase in the velocity reduction ratio. The velocity reduction ratio is not proportional to the equivalent area of impact, and the maximum velocity reduction ratios for the cubic, trapezoidal, and triangular-prism-shaped baffles are 25.0%, 26.3%, and 23.5%, respectively, at the channel slope is 12 degrees. Furthermore, the velocity reduction ratio is inversely proportional to the spacing between adjacent rows. Increasing the row spacing from 0.10 to 025 m leads to a 22% decrease in the average velocity reduction ratio. The maximum average velocity reduction ratio reaches around 25%, when the row spacing reduces to zero, and the baffles lose their deceleration ability when the row spacing increases to 1.42 m and the velocity reduction ratio is 13%. These experimental results can provide useful references for the design of large gradient drainage channels. (C) 2017 Elsevier B.V. All rights reserved.

KeywordDebris Flow Drainage Channel Baffle Energy Dissipation Structure
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1016/j.enggeo.2017.01.014
WOS Subject ExtendedEngineering ; Geology
Indexed BySCI
WOS KeywordCHINA
Language英语
Quartile3区
TOP
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000398872200004
Funding OrganizationNational Key Technology Research and Development Program of China(2014BALO5B01) ; Science and Technology Service Network Initiative of CAS(KFJ-EW-STS094) ; Youth Innovation Promotion Association CAS(2017426) ; West Light Foundation of Chinese Academy of Sciences
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18619
Collection山地灾害与地表过程重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Wang, Fei,Chen, Xiaoqing,Chen, Jiangang,et al. Experimental study on a debris-flow drainage channel with different types of energy dissipation baffles[J]. ENGINEERING GEOLOGY,2017,220:43-51.
APA Wang, Fei,Chen, Xiaoqing,Chen, Jiangang,&You, Yong.(2017).Experimental study on a debris-flow drainage channel with different types of energy dissipation baffles.ENGINEERING GEOLOGY,220,43-51.
MLA Wang, Fei,et al."Experimental study on a debris-flow drainage channel with different types of energy dissipation baffles".ENGINEERING GEOLOGY 220(2017):43-51.
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