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GATE CE 2014 Set 1 — Question 26

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MCQ+1 / -0.33MediumInfinite SlopesStability of SlopesGeotechnical Engineering

Geotechnical Engineering → Stability of Slopes → Infinite Slopes

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Question

A long slope is formed in a soil with shear strength parameters: c′=0c' = 0 and ϕ′=34∘\phi' = 34^\circ. A firm stratum lies below the slope and it is assumed that the water table may occasionally rise to the surface, with seepage taking place parallel to the slope. Use γsat=18 kN/m3\gamma_{sat} = 18 \text{ kN/m}^3 and γw=10 kN/m3\gamma_w = 10 \text{ kN/m}^3. The maximum slope angle (in degrees) to ensure a factor of safety of 1.5, assuming a potential failure surface parallel to the slope, would be
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