Foundations and Geotechnical Engineering | My Assignment Tutor

CET 4135 Foundations and Geotechnical EngineeringHomework #5Due 4/14 @ midnightLate Submissions AcceptedTotal Points: 100• Only computer-generated plots will be accepted• Submit as a PDF document• Show all workProblem 1 (20pts) Footing DesignA square footing is to be designed to properly distribute a vertical column load of 2000kips. The requiredFactor of Safety against bearing capacity failure … Continue reading “Foundations and Geotechnical Engineering | My Assignment Tutor”

CET 4135 Foundations and Geotechnical EngineeringHomework #5Due 4/14 @ midnightLate Submissions AcceptedTotal Points: 100• Only computer-generated plots will be accepted• Submit as a PDF document• Show all workProblem 1 (20pts) Footing DesignA square footing is to be designed to properly distribute a vertical column load of 2000kips. The requiredFactor of Safety against bearing capacity failure is 3. Determine the width of the footing given a depthof embedment of 3ft. The average soil properties directly below the footing are as follows: total unitweight of 110pcf, saturated unit weight of 120pcf, effective friction angle of ϕ=40°. The ground watertable is located at a depth of 20ft below the soil surface.Problem 2. (30pts) A square foundation (width = 4m) is built in downtown Denver and is subjected toan applied vertical load of 800kN. The depth to bedrock is 11.3m and the depth to groundwater table is2.5m below grade. The results from a pressuremeter test at the site provided soil elastic modulus asfollows: z [m]E [MPa]1.17.63.210.15.214.47.318.19.222.8 Divide the soil into appropriate layers based on the above data.1) determine the vertical stress increase below the center of the foundation at the center of each layer2) determine the displacement/settlement in each layer3) determine the total settlement beneath the center of the foundationProblem 3. (50pts) A circular foundation of diameter, 4m, and thickness, 0.2m, was designed to carry avertical column load of 1200 kN. The depth of embedment was set at 0.75m. A seismic piezocone testwas performed at the site of the foundation in a fine sandy silt. From triaxial testing, it was proven thatthe general CPT friction angle equation applies to the soil at the site. The groundwater table is locatedat a depth of 1.5m. Utilize the raw SCPTu data provided (HW5-SCPTu.xlsx) to determine the following:1) determine the drained bearing capacity of the soil2) determine the undrained bearing capacity of the soil3) determine if the foundation will be safe given that the required FS against bearing capacity failure is3.4) determine the settlement under the center of foundation for drained loading utilizing the displacementinfluence factor approach

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