Question

A 25 kN point load acts on the surface of an infinite elastic medium. The vertical pressure intensity in $kN/m^2$ at a point 6.0 m below and 4.0 m away from the load will be

• A. 132
• B. 13.2
• C. 1.32
• D. 0.132

Answer 1

The correct option is D 0.132

pressure intensity due to point load,

Q = 25 kN

$q=\frac{3Q}{2\pi z^2}{\left[\frac{1}{1+\frac{r^2}{z^2}}\right]}^{5/2}$

$=\frac{3\times 25}{2\pi \times 6^2}{\left[\frac{1}{1+{\left(\frac{4}{6}\right)}^2}\right]}^{5/2}$

$=0.132kN/m^2$