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GATE CE 2020 Geotech. Engg. Quiz 15
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Question 1
The net safe bearing capacity of a purely cohesive soil
Question 2
Find the settlement of a footing of width 1.2m with the following plate lad test result for sandy soil. Settlement of plate is 12mm; width of plate is 400 mm.
Question 3
A standard penetration test performed at a depth of 10m in a dense sand deposit with a unit weight of 17.5 kN/m3. If the observed N – value in 48 and water table is such that soil is saturated, then the corrected value of N is
Question 4
Using Terzaghi’s theory, the ultimate bearing capacity of a strip footing, 1.5 m wide resting on a saturated clay 
at a depth of 2 m below grounded level was determined. The water table was at a depth of 2 m from the ground level. If the water table rises by 0.5 m, calculated the percentage reduction in the ultimate bearing capacity.
at a depth of 2 m below grounded level was determined. The water table was at a depth of 2 m from the ground level. If the water table rises by 0.5 m, calculated the percentage reduction in the ultimate bearing capacity. Question 5
A foundation in a loose sand is 4 m wide, 6 m long and 1.5 m deep. The soil weighs 16 kN/m3 and has an effective angle of internal friction of 22.6 °. Compute the safe bearing capacity of soil (in kN/m2), adopting a factor of safety of 2.
Question 6
The results of two plate load tests performed on a given location with two circular plates are given below:
1. Diameter = 750 mm, S = 15 mm, Q = 150 kN
2. Diameter = 300 mm, S = 15 mm, Q = 50 kN
Use Housel’s equation i.e. Q = Aq + Ps
A = contact area
q = bearing pressure beneath area A (constant)
P = perimeter of footing
s = Perimeter shear (constant)
Determine the load (in kN) on circular footing 1.2 m diameter that will cause a settlement of 15 mm.
1. Diameter = 750 mm, S = 15 mm, Q = 150 kN
2. Diameter = 300 mm, S = 15 mm, Q = 50 kN
Use Housel’s equation i.e. Q = Aq + Ps
A = contact area
q = bearing pressure beneath area A (constant)
P = perimeter of footing
s = Perimeter shear (constant)
Determine the load (in kN) on circular footing 1.2 m diameter that will cause a settlement of 15 mm.
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