Experimental study on the unsteady characteristics of the two-phase debris flow

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

	Experimental study on the unsteady characteristics of the two-phase debris flow
	Lv Liqun; Wang Zhaoyin; Cui Peng
	2015
会议日期	JUN 28-JUL 03, 2015
会议地点	Delft, NETHERLANDS
关键词	two-phase debris flow intermittent flow flume experiment unsteady flow
页码	1516-1523
英文摘要	Debris flows are classified into one-phase and two-phase flows according to their movement features and the size distributions of solid particles. The two-phase debris flow is the mixture of the liquid phase composed of water and clay and silt and the solid phase composed of gravel, cobbles and boulders. There is apparent relative movement between the liquid phase and the solid phase in the two-phase debris flow and there is no relative movement between the particles and liquid in one-phase debris flows. The intermittent motion of one-phase debris flow has been reported and studied but few have been done on the intermittency of two-phase debris flows. This paper report the intermittent feature of two-phase debris flows in the nature and physical model experiments in a flume. The surge character in the experiments of the two-phase debris flow was obvious, and the head of the debris flow moved intermittently. In the experiment water flow initiated sediment from bed and side slopes and transported gravel particles to the front, accumulation of the gravel in the front of the flow made the height and front slop of the debris flow increase. Suddenly, the gravel moved forward as the slop reaches the critical value. Then the head height and slope reduced to some value and the flow stag again. The sediment supply from upstream and energy accumulation caused the debris flow moving again. Based on the two-phase debris flow experiments, the article studies the formation and development of intermittent surges process and establishes the mechanical model.
会议录	PROCEEDINGS OF THE 36TH IAHR WORLD CONGRESS: DELTAS OF THE FUTURE AND WHAT HAPPENS UPSTREAM
会议录出版者	IAHR-INT ASSOC HYDRO-ENVIRONMENT ENGINEERING RESEARCH
会议录出版地	MADRID
语种	英语
ISBN号	978-90-824846-0-1
WOS记录号	WOS:000398996201080
内容类型	会议论文
源URL	[http://ir.imde.ac.cn/handle/131551/35237]
专题	中国科学院水利部成都山地灾害与环境研究所
推荐引用方式 GB/T 7714	Lv Liqun,Wang Zhaoyin,Cui Peng. Experimental study on the unsteady characteristics of the two-phase debris flow[C]. 见:. Delft, NETHERLANDS. JUN 28-JUL 03, 2015.