Retaining wall problem example 2

A wall of 8 m height retains sand having a density of 1.936 Mg/m3 and an angle of internal friction of 34°. If the surface of the backfill slopes upwards at 15° to the horizontal, find the active thrust per unit length of the wall. Use Rankine’s conditions.
Solution
There can be two solutions: analytical and graphical. The analytical solution can be obtained from Eqs. (11.25) and (11.24) viz.,
Retaining wall problem solution