The total pressure on the vertical face of a retaining wall of height h exerted by the retained earth weighing $ω$ per unit volume having an angle of surcharge $α^{o}$ , is:

- 1
  
  $ω h \cos α \frac{\cos α - \sqrt{\cos^{2} α - \cos^{2} ϕ}}{\cos α + \sqrt{\cos^{2} α - \cos^{2} ϕ}}$
- 2
  
  $ω h^{2} \cos α \frac{\cos α - \sqrt{\cos^{2} α - \cos^{2} ϕ}}{\cos α + \sqrt{\cos^{2} α - \cos^{2} ϕ}}$
- 3
  
  $\frac{ω h^{2}}{2} \cos α \frac{\cos α - \sqrt{\cos^{2} α - \cos^{2} ϕ}}{\cos α + \sqrt{\cos^{2} α - \cos^{2} ϕ}}$
- 4
  
  $\frac{ω h^{2}}{3} \cos α \frac{\cos α - \sqrt{\cos^{2} α - \cos^{2} ϕ}}{\cos α - \sqrt{\cos^{2} α - \cos^{2} ϕ}}$

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