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Volume 36 Issue 11
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ZHOU Jian, DU Qiang, LI Ye-xun, ZHANG Jiao. Centrifugal model tests on formation mechanism of landslide-type debris flows of cohesiveless soils[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(11): 2010-2017. DOI: 10.11779/CJGE201411006
Citation: ZHOU Jian, DU Qiang, LI Ye-xun, ZHANG Jiao. Centrifugal model tests on formation mechanism of landslide-type debris flows of cohesiveless soils[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(11): 2010-2017. DOI: 10.11779/CJGE201411006
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Centrifugal model tests on formation mechanism of landslide-type debris flows of cohesiveless soils

  • 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
    2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;
    3. The Second Engineering Company of CCCC Third Harbor Engineering Co., Ltd., Shanghai 200122, China;
    4. Department of Civil Engineering and Transportation , Shanghai Polytechnic College, Shanghai 200432, China

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  • Received Date: December 02, 2014
  • Published Date: November 19, 2014
    Graphical Abstract
    • Abstract
  • Using the self-developed visualization test apparatus, centrifuge model tests are carried out to study the macro-mesoscopic formation mechanism of typical landslide-type debris flows according to field tests on a debris flow. Based on the grain-size gradation of field tests and gravity ratio, the centrifugal model tests are carried out under 20g. The soil samples are made up by silt sands and fine sands. The formation mode and soil-water action mechanism of landslide-type debris flows are analyzed from the macroscopic and mesoscopic points of view respectively by using the HD digital imaging equipment and the mesoscopic structure analysis software Geodip. The test results indicate that the centrifugal model tests can reproduce the phenomenon of the field tests approximatively. The formation mode of landslide-type debris flows is gradually collapsed in form of retrogradation to sliding. The reason of the formation of landslide-type debris flows is the shear strength failure of the slope caused by the rise of the pore water pressure and the seepage on the floor resulted from the motion of the fine particles with migratation of pore water in the slope.
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    • References (14)
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