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A 5 ft wide, 8 ft long, 2 ft deep spread footing is underlain by a soil with the following properties:

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Foundation Design: Principles and Practices (3rd Edition)

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- A 2.0 m 2.0 m square pad footing will be placed in a normally consolidated clay soil to carry a column load Q. The depth of the footing is 1.0 m. The soil parameters are: c = 0, = 26, = 19 kN/m3, and cu = 60 kN/m2. Determine the maximum possible value for Q, considering short-term and long-term stability of the footing.
*arrow_forward*A 2.0 m 2.0 m square pad footing will be placed in a normally consolidated clay soil to carry a column load Q. The depth of the footing is 1.0 m. The soil parameters are: c = 0, =26, = 19 kN/m3, cu = 60 kN/m2 (=0 condition). Determine the maximum possible value for Q, considering short-term and long-term stability of the footing.*arrow_forward*Refer to the rectangular combined footing in Figure 10.1, with Q1 = 100 kip and Q2 = 150 kip. The distance between the two column loads L3 = 13.5 ft. The proximity of the property line at the left edge requires that L2 = 3.0 ft. The net allowable soil pressure is 2500 lb/ft2. Determine the breadth and length of a rectangular combined footing.*arrow_forward* - A flexible circular footing of radius R carries a uniform pressure q. Find the depth (in terms of R) at which the vertical stress below the center is 20% of q.
*arrow_forward*Show your solution and diagram. Design a square spread footing to support an edge column 460mm x 460mm in dimension. The allowable soil pressure is 478.5 KPa, unit weight of soil is 20.4 KN/m³, unit weight of concrete is 23.5 KN/m³, fć = 21 MPa, fy = 414 MPa, 75mm clear cover and 25mm diameter rebars both ways.*arrow_forward*1. All dimensions, thicknesses, and spacings must be in 10 mm multiples 2. Use exact values throughout your calculations. Only the final answer is to be rounded of to two decimal places.*arrow_forward* - A continuous footing installed at a depth of 3 feet with base of 4 feet wide is constructed on cohesionless soil with a unit weight of 125 lb/ft³ and an angle of internal friction of 31°. The factor of safety requirement for the design is 2. The water table is sufficiently below the base of the foundation that won't interfere with the design. Determine: 1. Allowable bearing capacity (qa) 2. Allowable wall load in lb/ft. Plb B
*arrow_forward*2. A 10ft x 8ft foundation is set 4 feet below grade in the geotechnical setting provided in the above problem No 1, an applied load Q of 420kips is supported by this footing. Calculate the change of stress at 15ft and 30ft below grade at the center of the footing using: a. The 2:1 method b. m and n method*arrow_forward*1) A footing whose one side spans 4.2m carries a 520 kN dead load and 640kN live load from a reinforced concrete column. The column measures 500mm parallel to the long side of the foundation, and 800mm on the other side. Assume effective soil bearing capacity of 80kPa, concrete compressive strength of 21 MPa, and steel yield strength of 280 MPa. Determine the following: • Dimensions of the footing (use 100mm increments) • The thickness of the footing (use 10mm increments) • Number of 20mm reinforcements along each dimension*arrow_forward* - An eccentric footing shown has the following loads which acts on the center of the column: Pdl=400 kN Pll=650 kN Thickness of footing is 400mm f'c= 29 MPa; fy =420 MPa db=20mm Calculate the following: 1. The minimum and maximum soil pressure due to service loads 2. The minimum and maximum soil pressure due to factored loads
*arrow_forward*A proposed office building will include a 10 ft x10 ft square, 3 ft deep (the footing height is also 3 feet) spread footing. The normally consolidated clay has the following engineering properties: Ydry = 115.0 pcf $'=24° c'=90.0 psf Cc/(1+eo) = 0.15 The soil stratum extends to a great depth, and the ground water table is 50 ft below the ground surface. Using the classical piece-wise log-linear method, estimate the total settlement of this footing considering only the allowable bearing pressures using ASD approach. The unit weight of concrete is 150 pcf. State any assumptions made.*arrow_forward*A 4ft by 4ft spread footing is proposed where the bottom of footing is set 2ft below grade. The column bearing on this footing will impose a load of 180kips. Assuming the subsurface conditions shown below with groundwater 5ft below grade, Use Schmertman’s method to calculate the elastic settlement of the system 6 years after construction is completed, provide a clear sketch and show units and state assumptions.*arrow_forward*

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- Principles of Foundation Engineering (MindTap Cou...Civil EngineeringISBN:9781337705028Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage LearningFundamentals of Geotechnical Engineering (MindTap...Civil EngineeringISBN:9781305635180Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning