Two soft clay layers A and B, sandwich an intermediate sand layer. Assume ground water level...

 

 

  

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Two soft clay layers A and B, sandwich an intermediate sand layer. Assume ground water level is at the ground surface. Clay A H1 m Surcharge, p= ? kN/m² Pressure of permanent fill, po = 60 kN/m² Ysat 15.5 kN/m³ C₁ = 2 m²/year Ch = 3 m²/year my 0.00133 m²/kN 1 m Sand Ysand 18.0 kN/m³ Ysat 16.5 kN/m³ Clay B H2 m Cv = 3 m²/year C₁ = 7 m²/year my 0.00093 m²/kN Dense sand N>50 Fig 1. Subsurface soil profiles, soil properties and loading conditions (for Section B only) The given design parameters are: a) Pressure of permanent fill, po = 60 kN/m² b) Diameter of proposed sand drain, d or Dw = 500mm c) Smear factor, f = 0.8 Two soft clay layers A and B, sandwich an intermediate sand layer. Assume ground water level is at the ground surface. Clay A H1 m Surcharge, p= ? kN/m² Pressure of permanent fill, po = 60 kN/m² Ysat 15.5 kN/m³ C₁ = 2 m²/year Ch = 3 m²/year my 0.00133 m²/kN 1 m Sand Ysand 18.0 kN/m³ Ysat 16.5 kN/m³ Clay B H2 m Cv = 3 m²/year C₁ = 7 m²/year my 0.00093 m²/kN Dense sand N>50 Fig 1. Subsurface soil profiles, soil properties and loading conditions (for Section B only) The given design parameters are: a) Pressure of permanent fill, po = 60 kN/m² b) Diameter of proposed sand drain, d or Dw = 500mm c) Smear factor, f = 0.8