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Initiation and development of water film by seepage
Lu Xiaobing1; Cui Peng2; Hu Kaiheng2; Zhang Xuhui1
Corresponding AuthorLu, XB(鲁小兵)
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
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS SubjectEnvironmental Sciences
WOS IDWOS:000284074700006
Funding OrganizationNational Basic Research Program of China (973 program)(2008CB425802) ; Chinese Academy of Sciences(KZCX2-YW-302-02)
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
Recommended Citation
GB/T 7714
Lu Xiaobing,Cui Peng,Hu Kaiheng,et al. Initiation and development of water film by seepage[J]. JOURNAL OF MOUNTAIN SCIENCE,2010,7(4):361-366.
APA Lu Xiaobing,Cui Peng,Hu Kaiheng,&Zhang Xuhui.(2010).Initiation and development of water film by seepage.JOURNAL OF MOUNTAIN SCIENCE,7(4),361-366.
MLA Lu Xiaobing,et al."Initiation and development of water film by seepage".JOURNAL OF MOUNTAIN SCIENCE 7.4(2010):361-366.
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