help me please Part A: Determine the wall loading that can be carried by a long footing 1 m wide and located 1.7 m belowthe ground surface. Strength tests indicate that the soil has a cohesion of 55 KN/m? and angle of internalfriction of 24°. The saturated soil unit weight is18 KN/m³ and dry unit weight of soil is 15.5 KN/m³. Thesoil above the footing is well compacted. The water table is 0.5 m below the ground surface. Use a factorof safety to 3 with the Terzaghi bearing capacity equation.Part B Recalculate the bearing capacity for the condition of part A but where the water table is very deep

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Answered: Part A: Determine the wall loading that…

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter17: Settlement Of Shallow Foundations

Section: Chapter Questions

Problem 17.16CTP

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A 1.5 m square footing is founded at a depth of 1m (equal to the foundation thickness) in fine-grained soil with the following properties: ?dry = 20 kN/m3; ?sat = 22 kN/m3; ?u,k = 70 kPa; ?k′ = 10 kPa; ?k′ = 30° The load on the footing is vertical but has a maximum eccentricity (?) of 250 mm from one axis (Hint: B- = B − 2e). If the water table is at the foundation level, determine the design bearing resistance of the footing for a. short-term condition b. long-term condition
A long masonry wall footing carries a uniformly distributed load of 200 kN/m2. If the width of the footing is 4 m, determine the vertical pressures at a depth of 3 m below the (i) center, and (ii) edge of the footing
A 2-m by 2-m square footing is located 1.8 m below the ground surface and carries a load of 1000 kN. Determine the net vertical stress increment due to the uniform load at a depth of 4 m below the center of the footing.
Q.3. Three parallel strip footings 3 m wide each and 5 m apart center to center transmit contact pressures of 300, 450 and 150 kN/m2 respectively. Calculate the vertical stress due to the combined loads beneath the centers of each footing at a depth of 4 m below the base. Assume the footings are placed at a depth of 2 m below the ground surface. Use Boussinesq's method for line loads
A square footing which carries an axial load of 13000 kg has its bottom resting on a ground water table at a depth of 2.5 m from the ground surface. Nc = 35, Nq = 22, Nγ = 19. Take PDRY = 1910 kg/m3 and PSAT = 1600 kg/m3, c = 1800 kg/m2. Compute the net soil pressure.
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.
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.
If the water table in Problem 16.9 drops down to 0.25 m below the foundation level, what would be the change in the factor of safety for the same gross allowable load? 16.9 A square footing is shown in Figure 16.18. Determine the gross allowable load, Qall, that the footing can carry. Use Terzaghis equation for general shear failure (Fs = 4). Given: = 17 kN/m3, sat = 19.2 kN/m3, c = 32 kN/m3, =26, Df = 1 m, h = 0.5 m, and B = 1.5 m. Figure 16.18
Refer 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 16.17
A strip footing foundation 1 m wide is constructed in the slope of a hill whose surface inclination is 20°. The soil in the hill is a dense sand, with a unit weight of 19 kN/m3 and an angle of internal friction of 40°. Assume that the D/B ratio is about 1. Applying a factor of safety of 3, determine the wall loading the foundation can carry, per meter of footing length.
Determine the wall loading that can be car-ried by a long footing 1 m wide and located1.5 m below the ground surface. Strengthtests indicate, that the soil has a cohesion of58 kN/m? and an angle of internal friction of20°. The total soil unit weight is 18 kN/mThe soil above the footing is well compacted,and the depth factors will apply. The soilrigidity index is greater than the critical in-dex. The water table is expected to rise to theground surface. Use a factor of safety equalto 3 with the extended general bearing ca-pacity equation. (eq. 13-6 in pdf note) attached in image
A strip footing is to be designed to support a dead load of 500 kN/m and an imposed load of 300 kN/m at a depth of 0.7 m in a gravelly sand. Characteristic values of the shear strength parameters are c' = 0 and ϕ' =40˚. (a) Determine the required width of the footing if a factor of safety of 3.0 and assuming that the water table may rise to foundation level. (b) Would a foundation of that width satisfy the bearing resistance limit state? The unit weight of the sand above the water table is 17 kN/m3 and below the water table the saturated unit weight is 20 kN/m3.

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