Q2: A square footing (2x2 m)is constructed on a sandy soil as shown below.Find the maximum allowable load (Q) that thefooting can carry.1.5 mImAssume general shear failure and the factor of safety is 3.EY = 16 kN/m7-18 kN/m6349

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Q2: A square footing (2x2 m) is constructed on a sandy soil as shown below. Find the maximum allowable load (Q) that the footing can carry. Assume general shear failure and the factor of safety is 3. E- 1.5 m Im Y = 16 kN/m 7-18 kN/m 6-349 ties Use

Q2: A square footing (2x2 m) is constructed on a sandy soil as shown below. Find the maximum allowable load (Q) that the footing can carry. Assume general shear failure and the factor of safety is 3. E- 1.5 m Im Y = 16 kN/m 7-18 kN/m 6-349 ties Use

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter16: Soil Bearing Capacity For Shallow Foundations

Section: Chapter Questions

Problem 16.13P: A square footing (B B) must carry a gross allowable load of 1160 kN. The base of the footing is to...

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Q2: A square footing (2x2 m) is constructed on a sandy soil as shown below. Find the maximum allowable load (Q) that the footing can carry 1.5 m Assume general shear failure and the factor of safety is 3. Im 7-16 kN/m² 18 kN/m 6-34°
Problem3. A 0.6mm square column is supported by a 1.5m wide rectangular footing. The column transmits an axial service load and a service bending moment which acts parallel to the longitudinal axis of the base. The effective soil bearing pressure is 215kPa. The thickness of the footing is 0.50mm with a steel cover of 110mm. Axial Service Loads: DL = 620kN LL = 450kN Service Bending Moments: MDL= 110kN m MLL= 45KN m a. Solve for the required length of the footing. b. Using the length above, solve for the wide beam shear stress at ultimate loads. c. Using the length above, solve for the punching shear stress at ultimate loads. d. Using the length above, solve for the critical ultimate bending moment.
A strip footing is to be designed to carry a load of 800 kN/m at the depth of 7m in a gravelly sand . the appropriate shear strenght parameter are c =0 and φ=40o. Determine the width of the footing if a factor of safety 3 against shear failure is specified and assuming that that the water table may raise to foundation level.Above the water table the unit weight of the sand is 17 kn/m3 and below the water table the saturated unit weight is 20 kN/m3
A circular footing 3 m in diameter is shown below. Assume the general shear failure and use a factor of safety 2.8. Determine the follow?? = ??. ?? , ?? = ??. ??, ?? = ?. ??a. The gross allowable bearing capacity.b. Net Allowable bearing capacityc. The safe load that the footing can carry.
A rectangular footing of breadth size 3 m and length 5 m is designed on CLAY at a depth of 1.5 m below the ground level to support a vertical load of 1200 kN. The unit weight of the soil is 19 kN/m³ and shear strength parameters are cu 65 kN/m² and θ =0°. Calculate factor of safety and take the appropriate bearing capacity coefficient Nc, Nq, and Nr, as 5.7, 1.0 and 0 respectively.
Q3/A square footing is required to carry a gross load of 1500 kN. The base of the footing is to be 2.0m below the ground level. The ground water table will rise to the ground surface. The soil is saturated clay having the following properties: apparent cohesion c= 57.5 kPa, = 0 and y = 19.2kN/m³. Using the Meyerhof bearing capacity equation with a safety factor SF-3.0, find a suitable size for the footing.
A square footing is to support a 400mm x 400mm tied column that carries a service dead load of 880 kN and a service live load of 710kN. The column is reinforced with 8-25 mm diameter bars. The base of the footing is 1.5 meter below the natural grade line where the soil bearing capacity is 235 kPa. The soil above has a unit weight of 15.6 kN/m³. Using fy=275 MPa, f’c=27.5 MPa, and unit weight of concrete of 23.5 kN/m³. Assume footing depth of 600 mm for soil bearing pressure. Use U = 1.2D + 1.6L 1. Determine the number of 25 mm diameter bars in one direction. a. 10 b. 13 c. 8 d. 11 2. Determine the dowel requirement. a. 180 mm b. 220 mm c. 200 mm d. 190 mm 3. Determine the development length requirements. a. 500 mm b. 485 mm c. 515 mm d. 450 mm
A square footing is to support a 400mm x 400mm tied column that carries a service dead load of 880 kN and a service live load of 710kN. The column is reinforced with 8-25 mm diameter bars. The base of the footing is 1.5 meter below the natural grade line where the soil bearing capacity is 235 kPa. The soil above has a unit weight of 15.6 kN/m³. Using fy=275 MPa, f’c=27.5 MPa, and unit weight of concrete of 23.5 kN/m³. Assume footing depth of 600 mm for soil bearing pressure. Use U = 1.2D + 1.6L 1. Determine the footing dimensions in whole cm. a. 450 b. 320 c. 280 d. 400 2. Determine the depth of footing computed from one way shear in whole cm. a. 35.88 b. 34.25 c. 32.56 d. 44.36 3. Determine the depth of footing computed from punching shear in whole cm. a. 35.42 b. 34.25 c. 32.56 d. 48.30
A4-ft-wide long footing is located at the top of a slope whose inclination is 30°. The soil of the hill is sand with an assumed angle of internal friction of 30°. If the D/B ratio is 1 and the b/B ratio is also 1, what loading can be imposed on the footing per foot of length? Use a factor of safety of 3.
6. [Soil Bearing Capacity] ( Assume the general shear failure and use a factor of safety 2.8. Determine the follow N. = 25.13 , N, = 12.72, N,y = 8.34 a. The gross allowable bearing capacity. b. Net Allowable bearing capacity c. The safe load that the footing can carry. ). A circular footing 3 m in diameter is shown below. %3D Ground surface Y = 18.5 kN/m² C = 80 kPa 0 = 25° 1.1 m Dr = 1.8 m Water table Tse = 19.2 kN/m? Diameter = 3 m
A footing 2.5 × 2.5 m carries a pressure of 400 kPa at a depth of 1m in sand. The saturated unit weight of the sand is 20 kN/m3 and the unit weight of the sand above the water table is 17 kN/m3 . The design shear strength parameters are ?′ = 0 kPa and ?′ = 40o .Determine the bearing capacity of the footing for the following cases using EC7 - Design Approach 1:a. The water table is 5 m below ground levelb. The water table is 1 m below ground levelc. The water table is at ground level with vertical seepage upwards under ahydraulic gradient of 0.2.
67. A strip footing is to be designed to carry a gross load of 900 kN/m at a depth of 1 m in a gravelly sand. The appropriate shear strength parameters C = 0 and 6 = 38°. Determine the width of the footing if a factor of safety of 3 against shear failure is to be assured. Water table is found to be at foundation level. Above the water table, the saturated unit weight is 18 kN/m³ and below the water table, the saturated unit weight is 20 kN/ m³. For = 38°, the bearing capacity factors are: N = 49 and N = 67. Unit weight of water q is 9.8 kN/m³.