(Solved): Q2 A basement is required to be constructed in clay soils having undrained cohesion strength \( \ma ...

Q2 A basement is required to be constructed in clay soils having undrained cohesion strength \( \mathrm{Cu}=35 \mathrm{kPa} \) to an excavation depth of \( 8.0 \mathrm{~m} \). If the depth of hard layer is \( 12 \mathrm{~m} \) and unit weight of the clay \( =20 \mathrm{kN} / \mathrm{m} 3 \). Use the provided stability chart and determine the slope angle so that a factor of safety of \( 1.3 \) is achieved.