Practice Question: Passive Earth Pressure Acting on Retaining Wall

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Solution

According to Rankine’s formula:

\[p_p=K_p (p_o)\]\[K_p=\frac{1+sin∅'}{1-sin∅'}\]Where:
\(K_p= coefficient\ of\ passive\ earth\ pressure\)
\(p_o= overburden\ pressure\)
\(p_p = passive\ pressure\)
\(∅'= Effective\ friction\ angle\)

 

\[p_p=\frac{1+sin⁡27^o}{1-sin⁡27^o}(120)\]\[p_p=320\ psf\]

 

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