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The soil strength properties of a saturated soil specimen are known as: CUU = 35 kPa,...

The soil strength properties of a saturated soil specimen are known as: CUU = 35 kPa, ϕUU = 0֯; Ccu = 12 kPa, ϕcu = 12֯; C’ = 3 kPa, ϕ’ = 28֯. The shear stress on the potential failure plane is _________kPa when the maximum principal stress is 400 kPa, the minimum principal stress is 250 kPa and the pore water pressure is 160 kPa. (Hint: σ 1 ′ = σ 3 ′ K P + 2 c ′ K P, Kp is Rankine's passive earth pressure coefficient)

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