A Retaining wall 6m height retains sand with $\phi=30^{\circ}$ and unit weight of 24 kN/m$^{3}$ up to a depth of 3m from top.

From 3 to 6m the material is cohesive soil with C=10 kN/m$^{2}$, ΙΈ=10$^{\circ}$, $\gamma_{sat}=20 kN/m^{3}$. The water table is at 3m below ground level. And uniform surcharge of 10kN/m$^{2}$ acts on the top of soil. Draw the active earth pressure diagram detailing the values at the critical points. Also calculate the resultant thrust on the wall.

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