气候变化领域集成服务门户(CCPortal): Experimental study on the suffusion mechanism of gap-graded soils under an exceedance hydraulic gradient

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DOI	10.1007/s11069-021-04842-2
	Experimental study on the suffusion mechanism of gap-graded soils under an exceedance hydraulic gradient
	Chen L.; Wan Y.; He J.-J.; Luo C.-M.; Yan S.-F.; He X.-F.
发表日期	2021
ISSN	0921030X
英文摘要	Suffusion is an important mechanism initiating internal erosion in geotechnical structures. This paper studies the suffusion mechanism of gap-graded soils during the whole suffusion process under an exceedance hydraulic gradient. We define the exceeded critical ratio Ri and study the change in the parameters such as the flow velocity, hydraulic conductivity, and fine particle loss with Ri. Under steady flow, a formula for determining the flow velocity state of the sample with Ri according to the fine particle content and relative density of the sample was proposed; during the suffusion process, the influence of Rimax on the rate at which the flow velocity and hydraulic conductivity of the sample increase as Ri decreases was greater than that of the initial relative density and the initial fine particle content of the sample. Under unsteady flow, a larger initial relative density corresponds to a smaller amplitude of increase in the average value of the peak flow velocity with increasing Ri. Compared with the test under steady flow, the flow velocity under unsteady flow would experience abrupt changes. The relative position of the trend line L of the flow velocity varying with Ri under unsteady flow and the fixed peak water head height point A under steady flow was related to the relative density of the sample. © 2021, The Author(s), under exclusive licence to Springer Nature B.V.
关键词	Exceedance hydraulic gradient Fine content Flow velocity Relative density Suffusion
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206150
作者单位	Key Laboratory of Geomechanics and Embankment Engineering, Ministry of Education, Hohai University, Nanjing, Jiangsu 210098, China; Geotechnical Research Institute of Hohai University, Nanjing, Jiangsu 210098, China; Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education, Zhejiang University, Hangzhou, Zhejiang 310058, China; Institute of Geotechnical Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, China; Center for Hypergravity Experimental and Interdisciplinary Research, Zhejiang University, Hangzhou, Zhejiang 310058, China; State Grid Changzhou City Jintan District Electric Power Supply Company, Changzhou, Jiangsu 213200, China; Yellow River Institute of Hydraulic Research, Zhengzhou, Henan 450003, China
推荐引用方式 GB/T 7714	Chen L.,Wan Y.,He J.-J.,et al. Experimental study on the suffusion mechanism of gap-graded soils under an exceedance hydraulic gradient[J],2021.
APA	Chen L.,Wan Y.,He J.-J.,Luo C.-M.,Yan S.-F.,&He X.-F..(2021).Experimental study on the suffusion mechanism of gap-graded soils under an exceedance hydraulic gradient.Natural Hazards.
MLA	Chen L.,et al."Experimental study on the suffusion mechanism of gap-graded soils under an exceedance hydraulic gradient".Natural Hazards (2021).