Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Textbook Question
Chapter 6, Problem 6.7P
Determine the maximum column load that can be applied on a 1.5 m × 1.5 m square foundation placed at a depth of 1.0 m within a soil, where γ = 19.0 kN/m3, c′ = 10 kN/m2, and ф′ = 24°. Allow a factor of safety of 3.0.
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Students have asked these similar questions
Prob. 1) A shallow foundation shown below, with e, = 0.34 m and eB= 0.28 m. Water level
is located at a depth of 0.5 m below the ground surface. Determine the allowable
load, Q, with FS = 3.
Sandy clay
Y =18 kN/m³
Y sat =20 kN/m3
c'= 20 kN/m?
0,9 m
1.5 m x 2.0 m
O'= 25°
keg = 0.28 m
2.0 m
e, p.34m
1.5m
Prob. 2) An embankment load on a silty clay soil layer as shown below. Determine the
stress increase under the embankment at points A and B that are loaded at a depth
of 6 m below the ground surface.
5 m
1H:2V
1H:2V
1H:1V
8 m
Y=18 kN/m
Y=18 kN/m
В
A
Prob. 3): A circular shallow foundation has been constructed at depth Dr of 2 m. The gross
allowable load with FS= 3 is 600 kN. The soil properties given as following: y= 17 kN/m',
Ysat.= 21 kN/m', c'= 0 and o'= 20°. The water table located at the ground surface. Use the
general bearing capacity equation to determine the size of the foundation.
Problem 6:
A 1.5m square foundation was constructed at a depth of lm. The y =19.0 kN/m², c' = 10 kN/m²
and o' = 24° deg and a FOS of 3.0. Find the maximum column load that can be applied.
Determine the maximum column load that can be applied on a 1.5 m × 1.5 m square foundation placed at a depth of 1.0 m within a soil, where γ = 19.0 kN/m, c' = 10 kN/m2, and ' 24°. Allow a factor of safety of 3
Chapter 6 Solutions
Principles of Foundation Engineering (MindTap Course List)
Ch. 6 - For the following cases, determine the allowable...Ch. 6 - A 5.0 ft wide square footing is placed at 3.0 ft...Ch. 6 - Prob. 6.3PCh. 6 - Redo Problem 6.2 using the general bearing...Ch. 6 - The applied load on a shallow square foundation...Ch. 6 - A 2.0 m wide continuous foundation carries a wall...Ch. 6 - Determine the maximum column load that can be...Ch. 6 - A 2.0 m wide strip foundation is placed in sand at...Ch. 6 - A column foundation (Figure P6.9) is 3 m × 2 m in...Ch. 6 - For the design of a shallow foundation, given the...
Ch. 6 - An eccentrically loaded foundation is shown in...Ch. 6 - Prob. 6.12PCh. 6 - For an eccentrically loaded continuous foundation...Ch. 6 - A 2 m 3 m spread footing placed at a depth of 2 m...Ch. 6 - Prob. 6.15PCh. 6 - A tall cylindrical silo carrying flour is to be...Ch. 6 - A 2.0 m 2.0 m square pad footing will be placed...Ch. 6 - An eccentrically loaded continuous foundation is...Ch. 6 - A square foundation is shown in Figure P6.19. Use...Ch. 6 - The shallow foundation shown in Figure 6.25...Ch. 6 - Consider a continuous foundation of width B = 1.4...
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- The applied load on a shallow square foundation makes an angle of 15° with the vertical. Given: B= 1.83 m, D;= 0.91 m, 7 = 18.08 kN/m³, ' = 25°, and d' = 23.96 kN/m?. Use FS= 4 and determine the gross allowable (vertical component) load. Use Eq. (16.9).arrow_forwardH.Q 1 Consider a rectangular foundation. Given: B = 1.5 m, L = 2.5 m, Df= 1.2 m, H =0.9 m, o' = 40°, c' = 0, and y= 17 kN/m3. Using a factor of safety of 3, determine the gross allowable load the foundation can carry. Use Meyerhof equation.arrow_forwardA square foundation is placed at a depth of 1.5 m within a sandy clay where c'=14k/m2 , phi'=23 and y=18 kN/m3 to carry a column load of 950 kN. Determine the width of the foundation that can be allowed on the foundation with a factor of safety of 3 and use the width value you have found to calculate the allowable bearing capacity(assume general shear failure and use gross values for the Terzaghi Bearing Capacity formulation for the given foundation type). If you don't write down the required equation to find the width of the foundation you cannot get credit from this question. Use the table given to you in the figure.arrow_forward
- Q6. A column foundation (Figure below) is 3 m X 2 m in plan. Given: De = 1.5 m, o = 25°, c= 70 kN/m . Terzaghi's equation and assume general shear failure in soil and FS = 3, determine the net alowable koad. y = 17 kN/m 1.5 m 3 m x 2 m Yat = 19.5 kN/m Groundwater levelarrow_forwardA column foundation is 3 m × 2 m in plan. Given: Dƒ = 1.5 m, þ' = 30°, c′ = 80 kN/m². Using the general bearing capacity equation (CFEM see class slides from March 17 similar to Example 1 and 2 but with an added capacity term related to cohesion) and 0.5, determine the factored bearing capacity of the foundation (i.e. – use Þ). Use Yw = 9.81 kN/m³. For simplicity, read the values of Nc, Ną, and Ny directly from the table on page 26 of the lecture slides use the highlighted columns. Also, determine the maximum factored load for the column. - 1.5 m ↑ 1 m 3m x 2m - y = 17 kN/m³ Groundwater level Ysat = 19.5 kN/m³ =arrow_forwardConsider a continuous foundation of width B = 1.4 m on a sand deposit with c = 0, = 38, and = 17.5 kN/m3. The foundation is subjected to an eccentrically inclined load (see Figure 6.33). Given: load eccentricity e = 0.15 m, Df = 1 m, and load inclination = 18. Estimate the failure load Qu(ei) per unit length of the foundation a. for a partially compensated type of loading [Eq. (6.89)] b. for a reinforced type of loading [Eq. (6.90)]arrow_forward
- A 2.0 m wide continuous foundation carries a wall load of 350 kN/m in a clayey soil where = 19.0 kN/m3, c = 5.0 kN/m2, and = 23. The foundation depth is 1.5 m. Determine the factor of safety of this foundation using Eq. (6.28).arrow_forwardQUESTION #2 A rectangular foundation (B x 1.2B) has to be constructed as shown in Figure. Assume that y-17 kN/m³, Ysat = 20 kN/m³, D1-30°, D2-340, De 2 m, and Dw = 1 m. The gross allowable load with FS = 4 is 750 kN. Determine the size of the foundation by using general bearing capacity equation. Use: Meyerhof's bearing capacity and depth factors, DeBeer's shape factors. Qall 1.0 m 1.0 m G.W.L B x 1.2B Y = 17.0 kN/m² c=0 $1 = 30° Ysat = 20.0 kN/m² c = 0 kN/m² $2= 34°arrow_forwardDetermine the net ultimate bearing capacity of a mat foundation measuring 20m x 9m on a saturated clay with = 85 kN/, =0,. sand with the allowable settlement is 50mm, and .arrow_forward
- For the design of an eccentrically loaded shallow foundation, given the following: Y = 19 kN/m³ Ysat = 20 kN/m³ p' = 30° C' = 8 kN/m² Water Table at 0.5 m depth from GL Soil: 3 Foundation: Size = 1.5 m * 1.5 m Df = 1 m from GL e/B = 0.10 (one way eccentricity) Estimate the ultimate load per unit length of the foundation. using Meyerhof's methodarrow_forwardA 8 m layer of sand, of saturated unit weight 22 kN/m3, overlies a 6 m layer of clay, of saturated unit weight 27 kN/m3. A foundation carrying 1200 KN load is to be founded on the soil layer. If the clay is normally consolidated and the increase in effective pressure due to the foundation load at the center of clay is 27 kN/m2, Soil parameters are Cc = 0.25, eo = 1.0. Assume required data •Draw the soil profile diagram in detail, mentioning all the soil properties with the foundation details. •Calculate the consolidation settlement at the center of the clay layer.arrow_forwardRefer to Figure 5.2 and consider a rectangular foundation. Given: B = 1.5 m, L = 2.5 m, Df = 1.2 m, H = 0.9 m, Φ' = 40º, c' = 0, and γ = 17 kN/m3. Using a factor of safety of 3, determine the gross allowable load the foundation can carry. Use Eq. (5.3).arrow_forward
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