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    Brittle and plastic failure characteristics

     
    2023, 45(11): 2278-2288.
    Unsaturated shear strength characteristics of coarse-fine mixed soils in a wide range of degree of saturation: experimental phenomena .

    Figures of the Article

    • Grain-size distribution curves of test soils
    • Photos of coarse-fine mixed soils with different FCs
    • Soil-water characteristic curves
    • Results from direct shear tests on coarse-fine mixed soils (FC=36%, σv=100 kPa)
    • Brittle failure of unsaturated soils with low degree of saturation (FC=100%)
    • Sketch for limitation of brittleness index IB[20]
    • Variation of law of brittleness index with degree of saturation
    • Brittle and plastic failure characteristics
    • Dilation angles of coarse-fine mixed soils
    • Variation of unsaturated strength with degree of saturation and suction
    • Comparison of shear strengths of coarse-fine mixed soils
    • Variation of shear strength of different types of soils with saturation and suction
    • Types of shear strength for unsaturated soils[30]

    Tables of the Article

    • FC/% 16 24 36 50 65 80 100
      ρd/(g·cm-3) 1.89 1.94 2.04 2.00 1.94 1.81 1.68
      wopt/% 6.7 7.5 8.8 10.3 11.8 13.4 15.5
      Dry densities and water contents of test soils
    • FC/% ψa/kPa ψr/kPa Sre/%
      16 2.5 9.0 15.8
      24 6.2 98.6 14.4
      36 8.5 450.0 14.3
      50 16.0 700.0 15.5
      65 16.6 750.0 15.6
      80 20.0 1000.0 14.6
      100 25.0 1300.0 14.6
      注:ψa为进气值,ψr为残余值,Sre为残余饱和度。
      Main parameters of soil-water characteristic curves

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