3) A circular footing having a diameter of 1.2m has its bottom at a depth of 2.7m from the ground surface. Water table is located at a depth of 1.3m below the ground. Soil has the ff. properties. Dry unit weight = 18.1kn/cum Saturated unit weight = 19.3kn//cum C = 15.74kpa Angle of internal friction = 20deg %3D a) Assuming local shear failure, find ultimate bearing pressure using terzaghi's equation b) Det. Allowable bearing capacity using a factor of safety of 3. c) Find allowable load on footing.

Two footings, one circular and the other strip, are founded on the surface of a purely Cohesionless soil. Diameter of the circular footing and width of strip footing is same. Then, the ratio of ultimate bearing capacity of circular to strip footing is:

Estimate the immediate settlement of a concrete footing 1.5m*1.5m in size founded ata depth of 1m in silty soil whose modulus of elasticity is 90kg/cm2 .The footing isexpected to transmit a unit pressure of 200kN/m2Assume, µ = 0.35, If = 0.82 for a rigid footing.

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