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A 5 ft wide, 8 ft long, 3 ft deep footing supports a downward load of 200 k and a horizontal shear load of 25 k. The shear load acts parallel to the 8 ft dimension. The underlying soils have
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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_forwardRefer to Problem 16.1. If a square footing with dimension 2 m 2 m is used instead of the wall footing, what would be the allowable bearing capacity? 16.1 A continuous footing is shown in Figure 16.17. Using Terzaghis bearing capacity factors, determine the gross allowable load per unit area (qall) that the footing can carry. Assume general shear failure. Given: = 19 kN/m3, c = 31kN/m2, =28, Df = 1.5 m, B = 2 m, and factor of safety = 3.5. Figure 16.17arrow_forwardA 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
- Redo Problem 6.2 using the general bearing capacity equation [Eq. (6.28)]. A 5.0 ft wide square footing is placed at 3.0 ft depth within the ground where c = 200 lb/ft2, = 25, and = 115.0 lb/ft3. Determine the ultimate bearing capacity of the footing using Terzaghis bearing capacity equation and the bearing capacity factors from Table 6.1. What is the maximum column load that can be allowed with a factor of safety of 3.0?arrow_forwardFor a rectangular footing 4 ft x 8 ft, 100 kips of load is being applied. Compute stress increase 10 ft below the footing using 2:1 method in psi.arrow_forwarda square footing with a size of 10 ft by 10 ft is located 8ft below the ground surface. the subsoil consists of a thick deposit of stiff cohesive soil with an unconfined compressive strength equal to 3600lb/ft2. The soils units weight is 128lb/ft3. calculate the ultimate bearing capacity.arrow_forward
- A 500 mm square concrete column carries a factored ultimate vertical column load of780 kN. The vertical service load is 650 kN. It is to be supported on a square footing withf′ c = 17 MPa and fy = 420 MPa. The soil has an allowable bearing pressure for bearing cap-acity of 650 kPa (based on LRFD methods) and an allowable bearing stress for settlement of 160 kPa. The groundwater table is at a great depth. Determine the required footing width, thick-ness, size of the flexural reinforcement, and show your design in a sketch.arrow_forwardA 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 The foundation is presented in problem above is subjected to a vertical force as noted and a single moment of 100 kip-ft perpendicular to 10ft face. Calculate: a. Ultimate bearing capacity using modified method b. Factor of safety in designarrow_forward90 A square footing 4m on a side 1.2m below the ground surface for which the bulk unit weight of the soil is 20KN/m3. The cohesion of the soil is 14kPa and the angle of internal friction is 30degrees. Consider the condition of the general shear failure and evaluate the contribution of the following soil bearing capacity. Use the given Chart for the determination of the bearing capacity factors. 80 70 +No 60 - Nq Nr a. Cohesion Strength. b. Soil Overburden Strength. c. Footing Dimension Strength. 50 40 30 20 10 10 20 30 40 50 Friction Angle Nc, Nq, Nrarrow_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 Barrow_forwardAn 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 loadsarrow_forwardA 500 mm square concrete column carries factored ultimate column loads of PU = 580 kN andMU = 30 kN@m. The vertical service load is 490 kN. It is to be supported on a square footingwith f′c = 20 MPa and fy = 420 MPa. The soil has an allowable bearing pressure for bearingcapacity of 650 kPa (based on LRFD methods) and an allowable bearing stress for settlementof 280 kPa. The groundwater table is at a great depth. Determine the required footing, width,thickness, size of the flexural reinforcement, and show your design in a sketch.arrow_forward
- Principles of Geotechnical Engineering (MindTap C...Civil EngineeringISBN:9781305970939Author:Braja M. Das, Khaled SobhanPublisher:Cengage LearningPrinciples 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