2. Refer to the figure below for all remaining problems. The footing is square with a...

 

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2. Refer to the figure below for all remaining problems. The footing is square with a width of 5' and the loading is concentric. Laboratory strength and consolidation tests performed at various depths indicate that the properties are almost constant with depth through the clay layer. Average Consolidation Test Results o'p = 4 ksf DL-40 kips Cr 0.09 Co-0.32 e-0.7 c, -7 mm/min LL-20 kips 1 ft Yconcrete 150 pcf Sand '-28 y=100 pcf Overconsolidated Clay -35 c'-5 psf Su-500 psf (0-0) y= 115 pcf a. Calculate the factor of safety against a bearing capacity failure for short-term "end-of- construction" conditions. b. Calculate the factor of safety against a bearing capacity failure in the long term. c. Using elastic solutions for stress distribution, calculate and plot a profile of the stress influence factor down to a depth of 2B below the bottom of the footing. In other words, plot / vs depth for every 2' to a depth of 10'. d. Estimate the ultimate consolidation settlement of the footing. Use 4 sublayers in your analysis, each having a thickness of your choice. Assume the overconsolidated clay layer is 10' deep underlain by bedrock. If you use Excel (advised) to do the settlement calculations, show sample hand calculations for all the steps so I can check your work. 2. Refer to the figure below for all remaining problems. The footing is square with a width of 5' and the loading is concentric. Laboratory strength and consolidation tests performed at various depths indicate that the properties are almost constant with depth through the clay layer. Average Consolidation Test Results o'p = 4 ksf DL-40 kips Cr 0.09 Co-0.32 e-0.7 c, -7 mm/min LL-20 kips 1 ft Yconcrete 150 pcf Sand '-28 y=100 pcf Overconsolidated Clay -35 c'-5 psf Su-500 psf (0-0) y= 115 pcf a. Calculate the factor of safety against a bearing capacity failure for short-term "end-of- construction" conditions. b. Calculate the factor of safety against a bearing capacity failure in the long term. c. Using elastic solutions for stress distribution, calculate and plot a profile of the stress influence factor down to a depth of 2B below the bottom of the footing. In other words, plot / vs depth for every 2' to a depth of 10'. d. Estimate the ultimate consolidation settlement of the footing. Use 4 sublayers in your analysis, each having a thickness of your choice. Assume the overconsolidated clay layer is 10' deep underlain by bedrock. If you use Excel (advised) to do the settlement calculations, show sample hand calculations for all the steps so I can check your work.