Question

When the maximum vertical stress is 0.235 kN/m^2 at a radial distance of 4m from the point load is __________ kN.

(a) 42.34

(b) 10.56

(c) 20.76

(d) 30.65

This question was posed to me by my school teacher while I was bunking the class.

Asked question is from Stress Distribution in portion Stress Distribution of Geotechnical Engineering I

Answer 1

Right choice is (a) 42.34

Explanation: Given,

(σz)max=0.235 kN/m^2

r=4m

since the maximum vertical stress is

\((σ_z)_{max}=\frac{0.0888Q}{r^2} \)

∴ \(Q=\frac{(σ_z)_{max}r^2}{0.0888} \)

∴ \(Q=\frac{0.235*4^2}{0.0888} \)

Q=42.34 kN.