A bridge pier is to be founded on the bed of a river on a strip foundation 4 m wide. The founding level is 2 m below the river bed, and the depth of the water is 4 m. The porewater in the river bed is in hydraulic equilibrium with the river. The total load including the weight of the structure and foundation is 2000 kN per meter run. The river bed consists of sand with a saturated unit weight of 19 kN/m and a drained strength of c' 0, 35°. Calculate the factor of safety against drained bearing capacity failure.

Conduct stability analysis under extreme load condition for the design of a 50 m high concrete gravity dam. All Assume that the bi dam behaves as a monolithic structure. Normal operating level: 45 m Shear strength at foundation level: 5 MPa Compressive strength of concrete: 30 MPa • Compressive strength of base material: 25 MPa Friction coefficient at foundation level: 0.75 Specific weight of concrete: 24 kN/m Specific gravity of water: 10 kN/m Level of sediment accumulated in the reservoir: 5 m Underwater specific gravity of the sediment accumulated in the reservoir: 11 kN/m (Q-32", K-(1-sinQy(1+sinQ)] Earthquake coefficients: k 0.1, k. 0.05 Ice force: 100 kN/m Tail water is not present. It is envisaged that the lifting pressure will be reduced by 40% with the drainage structures to be constructed. 0.00 0.9

Given: - Density of concrete = 2260kg/cu m. - Uplift pressure, U : full at the heel to zero at the toe Solve for the Minimum and maximum soil pressures at the base of the dam. 15m 13.8m 3m 6m

Civil engineering -Hydraulics