Civil Engineering > GATE 2017 SET-2 > Geotechnical Engineering
For the construction of a highway, a cut is to be made as shown in the figure.
The soil exhibits c' = 20 kPa, φ' = 18° and the undrained shear strength = 80 kPa. The unit weight of water is 9.81 kN/m3. The unit weights of the soil above and below the ground water table are 18 and 20 kN/m3, respectively. If the shear stress at Point A is 50 kPa, the factors of safety against the shear failure at this point, considering the undrained and drained conditions, respectively, would be
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