An 8 ft tall basement wall retains a soil that has the following properties: c' = 0, Φ' = 35°, γ = 127 lb/ft^3, OCR = 2. The ground surface is horizontal and level with the top of the wall. The groundwater table is well below the bottom of the wall. Consider the soil to be in the at-rest condition

Question

An 8 ft tall basement wall retains a soil that has the following properties: [latex]c^{\prime } = 0[/latex], [latex]Φ^{\prime } = 35°[/latex], [latex]γ = 127 lb/ft^{3}[/latex], OCR = 2. The ground surface is horizontal and level with the top of the wall. The groundwater table is well below the bottom of the wall. Consider the soil to be in the at-rest condition and compute the force that acts between the wall and the soil.

Accepted Answer

[latex]K_{0}=\left(1 - \sin \Phi ^{\prime }\right) OCR^{\sin \Phi ^{\prime }}=\left(1 - \sin 35°\right) 2^{\sin 35°}=0.635[/latex]

[latex]P_{0}/b=\frac{\gamma H^{2}K_{0}}{2} =\frac{\left(127 lb/ft^{2}\right) \left(8 ft\right)^{2} \left(0.635\right) }{2} =[/latex] 2580 lb/ft

Because the theoretical pressure distribution is triangular, this resultant force acts at the lower third-point on the wall.

Question 16.1: An 8 ft tall basement wall retains a soil that has the follo...

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