Question

The Boussinesq influence factor for r/z ratio equal to 1 is given by ____________

(a) 0.3840

(b) 0.5465

(c) 0.0844

(d) 0.2312

This question was posed to me in my homework.

My question is taken from Stress Distribution topic in portion Stress Distribution of Geotechnical Engineering I

Answer 1

Correct answer is (c) 0.0844

To explain: Given,

r/z=1

The Boussinesq influence factor is given by,

\(K_B=\frac{3}{2π} \left[\frac{1}{1+(\frac{r}{z})^2}\right]^{\frac{5}{2}} \)

\(K_B=\frac{3}{2π} \left[\frac{1}{1+1^2}\right]^{\frac{5}{2}} \)

KB=0.0844.