Question

If r/z ratio is 0.5 and load of 20 kN is acting at a point, then the vertical pressure at a depth 6m is ____________

(a) 0.4356 kN/m^2

(b) 0.244 kN/m^2

(c) 0.1518 kN/m^2

(d) 0.597 kN/m^2

I had been asked this question in class test.

Query is from Stress Distribution topic in portion Stress Distribution of Geotechnical Engineering I

Answer 1

The correct option is (c) 0.1518 kN/m^2

The explanation: Given,

r/z=0.5

Q=20 kN

Z=6m

\(σ_z=\frac{0.2733Q}{z^2} \)

\(σ_z=\frac{0.2733*20}{6^2} \)

σz=0.1518 kN/m^2.