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Experimental study on the regulation function of slit dam against debris flows

文献类型：期刊论文

作者Zhou, Gordon G. D.1,2; Hu, H. S.1,2; Song, D.1,2; Zhao, T.3; Chen, X. Q.1,2
刊名LANDSLIDES
出版日期2019
卷号16期号:1页码:75-90
关键词Slit dam Debris flows Regulation function Relative post spacing Water content
ISSN号1612-510X
DOI10.1007/s10346-018-1065-2
通讯作者Hu, H. S.(huhongsen15@mails.ucas.edu.cn)
英文摘要Slit dams are open-type structures used to mitigate debris-flow hazards by constricting the flow and attenuating the kinetic energy. However, slit dams are often filled up as they are designed to impede debris volume instead of reducing kinetic energy of debris flows. To better understand the regulation function of slit dams against debris flows, physical model tests were carried out using a 7-m-long flume. The water content and relative post spacing were varied to discern their influence on the regulation function. Results reveal that the velocity attenuation and trapping efficiency is strongly controlled by water content and relative post spacing. Water content fundamentally reflects the degree of liquefaction (effetive grain-contact stress) and capacity of energy dissipation of debris flows. When water content <26%, relative post spacing has a noticeable effect on velocity attenuation, trapping efficiency, and run-out distance. In contrast, when water content 26%, the influence relative post spacing is negligible. Furthermore, a new relationship between velocity attenuation and trapping efficiency for the design of slit dams is proposed to avoid the slit dam being easily filled up by sediments contained in debris flows.
WOS关键词GRANULAR FLOW ; LANDSLIDE ; DESIGN ; PRESSURE ; MOBILITY ; DISASTER ; MASS
资助项目National Natural Science Foundation of China[11672318] ; Youth Innovation Promotion Association, CAS ; Chinese Academy of Sciences (CAS) Pioneer Hundred Talents Program ; Research Grants Council of the Government of Hong Kong SAR, China[T22-603/15-N]
WOS研究方向Engineering ; Geology
语种英语
WOS记录号WOS:000456794700008
出版者SPRINGER HEIDELBERG
资助机构National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Chinese Academy of Sciences (CAS) Pioneer Hundred Talents Program ; Research Grants Council of the Government of Hong Kong SAR, China
源URL[http://ir.imde.ac.cn/handle/131551/24996]  
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Hu, H. S.
作者单位1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, Chengdu, Sichuan, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Coll Water Resources & Hydropower, Chengdu 610065, Sichuan, Peoples R China
推荐引用方式
GB/T 7714		 Zhou, Gordon G. D.,Hu, H. S.,Song, D.,et al. Experimental study on the regulation function of slit dam against debris flows[J]. LANDSLIDES,2019,16(1):75-90.
APA Zhou, Gordon G. D.,Hu, H. S.,Song, D.,Zhao, T.,&Chen, X. Q..(2019).Experimental study on the regulation function of slit dam against debris flows.LANDSLIDES,16(1),75-90.
MLA Zhou, Gordon G. D.,et al."Experimental study on the regulation function of slit dam against debris flows".LANDSLIDES 16.1(2019):75-90.

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来源：成都山地灾害与环境研究所

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