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Volume 38 Issue 7
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WANG Gang, ZHANG Jian-min, WEI Xing. Effect of soil profile on post-earthquake delayed deformation of sand slopes[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(7): 1345-1350. DOI: 10.11779/CJGE201607024
Citation: WANG Gang, ZHANG Jian-min, WEI Xing. Effect of soil profile on post-earthquake delayed deformation of sand slopes[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(7): 1345-1350. DOI: 10.11779/CJGE201607024
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Effect of soil profile on post-earthquake delayed deformation of sand slopes

  • 1. School of Civil Engineering, Chongqing University, Chongqing 400044, China;
    2. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China;
    3. Department of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

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  • Received Date: May 24, 2015
  • Published Date: July 24, 2016
    Graphical Abstract
    • Abstract
  • The post-earthquake flow deformation of dilative sand is associated with the compulsory water absorption due to seepage water inflow in boundary value problems. A simplified procedure, which can both reproduce the diffusion and migration of excess pore water pressure and describe the behavior of sand under water absorption conditions, is employed to study the effect of different soil profiles and soil permeability on the post-earthquake flow deformation of sand slopes. It is found that the flow deformation always concentrates on the interface where the flow of the seepage water is blocked. The thicker the liquefied layer beneath the interface is, the larger the water absorption amount of the sand on the interface is, and hence the flow deformation is larger. The amount of flow deformation can be reduced greatly by setting drainage columns to mitigate the accumulation of the excess pore water pressure beneath the blocking interface. More importantly, it is suggested that the rate of flow deformation should be controlled by the permeability of soil, and the viscosity of the materials can be ignored practically.
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    • References (13)
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