A strip footing 2m wide carries a load intensity of 400 kN/m2at a depth of 1.2 m in sand. The saturated unit weight of sand is 19.5 kN/m3 and unit weight above water table is 16.8 kN/m3. The shear strength parameters are C=0 and Ф = 350 . Determine the factor of safety with respect to shear failure for the following cases of location of water table :(a) Water table is 4m below G.L(b) Water table is 1.2 m below G.L(c) Water table is 2.5 m below G.L(d) Water table is 0.5 m below G.L(e) Water table is G.L itself

Q: Q1. Determine the net bearing pressure for a 3m x 3m footing at a depth of 2 m in a medium dense…

A: Data given:Size of footing =3m×3mdepth of footing =2mpermissible settlement =25mmfinal corrected SPT…

Q: A load of 425 kN/m is carried on a strip footing 2 m wide at a depth of 1 m in a stiff clay of…

A: Given : Load = 425 kN/m Width of strip footing = 2 m depth of strip footing = 1 m Saturated unit…

Q: The column footing has been subjected to the ground surface. The clay layer has a unit weight of…

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Q: A continuous concrete footing (yc = 24 kN/m³) of breadth 2.0 m and thickness 0.5 m is to be founded…

A: The given data is: γc=24 KN/m3  Cu=22 KPa γ=19 KN/m3 Vertical load, V=85 KN/m Factor of safety,…

Q: A square footing having a dimension of 3.2 m is supported by a soil (dense sand) with the following…

A: To Find :- Gross allowable bearing capacity using Terzaghi equations for various given locations of…

Q: After the footing in Problem 7.9 was built, the groundwater table rose to a depth of 0.5 m below the…

A: Unfactored load = 220 kN/m Df = 400 mm or 0.4 m c' = 0' = 37o

Q: Using terzaghi Problem No. 2 A circular footing with 1.50m diameter is to be constructed 1.22m below…

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Q: 4 Two footings on the same level, have qo=100 kPa each, one circular with a diameter of 3.0 m and…

A: The given data is: q0 = 100 kPa Diameter of circular footing (d) = 3 m Width of square footing (b) =…

Q: A long footing 2 m wide is located in the level area at the top of a long, 45° slope where clay…

A: Given: The width of the footing is 2 m. The cohesion of clay is 65 kPa. The unit weight is 17.5…

Q: following observations were recorded. The size o 45cm x 45cm. Plot the Pressure-Settlemen determine…

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Q: Two meters below the ground surface, a 2x2 m square footing is constructed on NC clayey sand. The…

A: Given data: Size of square footing = 2m * 2m Average Cone resistance = 20 MPa Layer of Hard rock is…

Q: A footing 2.25 x 2.25m is located at a depth of 1.5 m in a sand, the shear streng parameters to be…

A: Given : Footing size = 2.25 X 2.25 m Depth = 1.5 m To Find : Ultimate bearing capacity : A) if the…

Q: A strip footing 1.5 m wide is located at a depth of 0.75 m (equal to the foundation thickness) in a…

A: Width of strip footing = 1.5m , Depth = 0.75m = Thickness of foundation , Unit weight of sand =…

Q: A load of 430 kN/m is carried on a strip footing 2m wide at a depth of Im in a stiff clay of…

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Q: A strip footing founded on dense sand (p=35° from direct shear tests and yar-17kN/m³), is to be…

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Q: 3500 kN 3 m x 3 m 0.6 m Ya = 17.5 kN/m³ Sand 0.6 m GWT Sand Ysat = 18.3 kN/m3 1.2 m Y sat = 17.1…

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Q: The 2.5 m x 3.5 m rectangular spread footing placed at a depth of 1.5 m supports a vertical load of…

A: To find:Factor of safety

Q: A 1.8 m square, 2 m deep footing supports a service load of 570 kN. It is supported on a clayeysand.…

A: Solution Given Data Service load= 570 kN 1.8 m square  2 m deep

Q: 3. A square footing which carries an axial load of 132530 kg has its bottom resting on a groundwater…

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Q: A circular footing 3 m in diameter is shown below.  Assume the general shear failure and use a…

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Q: (a) Determine the wall loading that can be carried by a long footing 1 m wide and located 1.5 m…

A: Given data:

Q: a) A 2 mx 2 m square footing is subjected to an axial load of 600 kN and a bending moment of 180 kNm…

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Q: A square footing is located in a dense sand at a depth of 2.80 m. Determine the ultimate bearing…

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Q: A 1.8 m square, 2 m deep and 1 m high footing supports a column load of 570 kN. It is supported on a…

A: The Dilatometer test (DMT) is an in-situ method of testing that is used to determine the strength…

Q: A clay sanitary pipe is located at a point C below the footing shown below. Determine the increase…

A: First we summarise the given data : z = 5 feet UDL q = 1800 psf To Find : Determine the increase in…

Q: A rectangular footing (4.89 x 4.38 m.) is placed 1.21 m. below the ground surface. The soil…

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Q: A circular footing having a diameter of 1.47m has its bottom at a depth of 2.54 m from the ground…

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Q: A water tank is to be constructed on the soil deposit shown in the figure below. A circular footing…

A: To find settlement due to primary consolidation

Q: A square footing shown has the following details: Unit weight of soil = 17.66 kN/m3 Saturated unit…

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Q: A rectangular footing of B=3 and L=6 rests at the depth of 2 m below the ground level. The stress…

A: Based in the given data, we can use the stress increase due point load equation of Boussinesq's.…

Q: A pad footing of dimensions 1.2 m by 2.5 m applies a surface pressure of 425 kPa. The pad footing is…

A: Given: The dimension of the footing is 1.2 m x 2.5 m. The surface pressure is 425 kPa. The thickness…

Q: A square footing is proposed to be constructed on the silty sand layer as shown in Figur Q2. If the…

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Q: A proposed industrial building will carry unfactored column loads ranging from 280 to 1,200kN and…

A: given

Q: For the loaded area shown below, determine the increase in vertical stress (4p) at 5 ft below points…

A: To find: increase in vertical stress (σz) Depth (z) = 5ft. UDL from footing = 1800 lb/ft2

Q: square footing is proposed to be constructed on the silty sand layer as shown in Figure Q2. If the…

A: γ - The soil is prone to failure by means of shear prior to any other mode of failure. The shear…

Q: 2- Determine the stress increase below the center of the footing using both theoretical and…

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Q: Calculate the settlement of the 10-ft-thick clay layer that will result from the load carried by a…

A: Given  The thickness of clay layer= 10 ft  The thickness of sand layer= 10ft The thickness of dry…

Q: carry using factor of sa

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Q: A combined footing is proposed to support two columns, C1 and C2, with loads equal to 2000 kN and…

A: (i) Soil Bearing Capacity: The bearing capacity of the soil can be calculated using the following…

Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.