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

doi:10.1007/s10346-018-1065-2

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

	Experimental study on the regulation function of slit dam against debris flows
	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
	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
DOI	10.1007/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.
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关键词	GRANULAR FLOW ; LANDSLIDE ; DESIGN ; PRESSURE ; MOBILITY ; DISASTER ; MASS
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000456794700008
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
内容类型	期刊论文
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.