IMECH-IR  > 水动力学与海洋工程重点实验室(2009-2011)
Initiation and development of water film by seepage
Lu XB(鲁晓兵); Cui P; Hu KH; Zhang XH(张旭辉); LU XB
Source PublicationJournal of Mountain Science
AbstractWhen water seeps upwards through a saturated soil layer, the soil layer may become instability and water films occur and develop. Water film serves as a natural sliding surface because of its very small friction. Accordingly, debris flow may happen. To investigate this phenomenon, a pseudo-three-phase media is presented first. Then discontinuity method is used to analyze the expansion velocity of water film. Finally, perturbation method is used to analyze the case that a water flow is forced to seep upwards through the soil layer while the movement of the skeleton may be neglected relative to that of water. The theoretical evolutions of pore pressure gradient, effective stress, water velocity, the porosity and the eroded fine grains are obtained. It can be seen clearly that with the erosion and re-deposited of fine grains, permeability at some positions in the soil layer becomes smaller and smaller and, the pore pressure gradient becomes bigger and bigger, while the effective stress becomes smaller and smaller. When the effective stress equals zero, e.f. liquefaction, the water film occurs. It is shown also that once a water film occurs, it will be expanded in a speed of (U)(t)/(1 - E >).
KeywordSlope Seepage Debris Flow Water Film Mechanism Liquefaction Cracks Sand
Indexed BySCI
WOS IDWOS:000284074700006
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Funding OrganizationNational Basic Research Program of China (973 program) [2008CB425802] ; Chinese Academy of Sciences [KZCX2-YW-302-02]
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLU XB
Recommended Citation
GB/T 7714
Lu XB,Cui P,Hu KH,et al. Initiation and development of water film by seepage[J]. Journal of Mountain Science,2010,7(4):361-366.
APA 鲁晓兵,Cui P,Hu KH,张旭辉,&LU XB.(2010).Initiation and development of water film by seepage.Journal of Mountain Science,7(4),361-366.
MLA 鲁晓兵,et al."Initiation and development of water film by seepage".Journal of Mountain Science 7.4(2010):361-366.
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