Test Study on the Seepage Properties for the Transition State from Laminar Flow to Turbulent Flow in an Outwash Deposit，China

• 责任者：Tu Guoxiang (State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Deng Hui
• 刊名：Journal of Chengdu University of Technology
• 出版年：2010
• 卷期：37(1)
• 关键词：冰水沉积物 ; outwash ; 渗水试验 ; infiltration tests ; 澜沧江 ; Lancang River
• 页码：p.82-90
• 图表：7 illus., 5 tables, 12 refs.
• 分类号：1701
• issnNo：ISSN1671-9727
• isbnNo：CN51-1634/N

There are a lot of outwash deposits formed in the medium-term or terminal Pleistocene of the Quaternary Period. They are distributed along the upriver valley of the Lancangjiang River in the southwest of China. Through investigating and testing an outwash deposit, a conclusion is drawn that the outwash deposit should be separated into two layers. The groundwater moving properties of the surface mixture soil with giant granular is expressed in a transition state from laminar flow to turbulent flow, and the relationship between seepage velocity and hydraulic gradient can be described in power function. However, that of the bottom coarse granular soil is like laminar flow. Based on this testing, two methods to calculate the outwash deposit seepage coefficient are brought forward.