Question

In a certain sea shore, the height of a retaining wall with smooth vertical back is 4.4 m. The foundation is over an expansive collapsible soil and has a horizontal surface at the level of the top of the wall and carries a UDL of 197 kPa. The unit weight and angle of internal friction are $19kN/m^3$ and ${30}^{\circ }$, respectively. What is the nearest magnitude of the total active pressure per meter length of this sea shore wall?

• A. 270 kN/m
• B. 360 kN/m
• C. 450 kN/m
• D. 640 kN/m

Answer 1

The correct option is B 360 kN/m


$P_a=k_{a}q.H+\frac{1}{2}{k}_a\gamma H^2=\frac{1}{3}\times 197\times 4.4+\frac{1}{2}\times \frac{1}{3}\times 19\times {4.4}^2=350.24kN/m$