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of /home/abouaayt/public_html/aboutcivil/answers/qa-plugin/user-management/layer.php Calculate the vertical stress at a depth of 3m below the ground surface due to weight of the soil whose unit weight is 18.5KN/m^3. - Civil Engineering Technical Questions Answers - Ask a Civil Engineer
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Calculate the vertical stress at a depth of 3m below the ground surface due to weight of the soil whose unit weight is 18.5KN/m^3. Assume the water table is at a depth of (a) 5m (b) 2m

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Vertical stress below 3m ground level..

when Ground water table(G.W.T) is at 5 m from the ground surface::
there is no effect of pore water pressure at 3m..
so,,effective vertical stress at 3m = (unit wt X thickness of soil) =18.5 * 3 = 55.5 KN/m^2...

when Ground water table(G.W.T) is at 2 m from the ground surface::
there is effect of porewater pressure that results in decrease in effective stress...
so,,effective vertical stress at 3m= (unit wt X thickness of soil) - (9.81 * 1) = 45.69 KN/m^2
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