tlon can cany. 12.9 An eccentrically loaded foundation is shown in Figure 12.25. Determine the ultimate load Q, that the foundation can carry. 12.10 A 1.5 m X 2.0 m foundation is placed at 1.0 m depth in a clay soil, where y = 19.0 kN/m², C, = 40 kN/m2 , and o = 0. What is the maximum column load that the foundation can carry with factor of safety of 3? 12.11 An eccentrically loaded foundation is shown in Figure 12.26. Use FS = 4, and determine the allowable load that the foundation can carry. Y = 108 lb/ft Y = 105 lb/ft Groundwater table 3 ft Groundwater level 4 ft 5 ft x 6 ft 118 lb/ft Ysat = 124 Ib/ft = 25° e 1450 lb/ft? Ysat c' = 400 lb/ft2 6 = 25° 9 ft X 6 ft + 2 ft 5 ft 12.24 Figure 12.25

tlon can cany. 12.9 An eccentrically loaded foundation is shown in Figure 12.25. Determine the ultimate load Q, that the foundation can carry. 12.10 A 1.5 m X 2.0 m foundation is placed at 1.0 m depth in a clay soil, where y = 19.0 kN/m², C, = 40 kN/m2 , and o = 0. What is the maximum column load that the foundation can carry with factor of safety of 3? 12.11 An eccentrically loaded foundation is shown in Figure 12.26. Use FS = 4, and determine the allowable load that the foundation can carry. Y = 108 lb/ft Y = 105 lb/ft Groundwater table 3 ft Groundwater level 4 ft 5 ft x 6 ft 118 lb/ft Ysat = 124 Ib/ft = 25° e 1450 lb/ft? Ysat c' = 400 lb/ft2 6 = 25° 9 ft X 6 ft + 2 ft 5 ft 12.24 Figure 12.25

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Shallow Foundations: Ultimate Bearing Capacity

Section: Chapter Questions

Problem 6.8P: A 2.0 m wide strip foundation is placed in sand at 1.0 m depth. The properties of the sand are: γ =...

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A column foundation (Figure P6.9) is 3 m × 2 m in plan. Given: Df = 1.5 m, ф′ = 25°, c′ = 70 kN/m2. Using Eq. (6.28) and FS = 3, determine the net allowable load [see Eq. (6.24)] the foundation could carry. Figure P6.9
A circular foundation of 1.5 m diameter is constructed in a sand deposit. Given: Df =1 5 m, soil friction angle Ø =35o and soil unit weight γ =17 4kN/m3. Estimate the ultimate uplift capacity of the foundation.
A 2.0 m wide strip foundation is placed in sand at 1.0 m depth. The properties of the sand are: γ = 19.5 kN/m3, c′ = 0, and ф′ = 34°. Determine the maximum wall load that the foundation can carry, with a factor of safety of 3.0, using Terzaghi’s original bearing capacity equation with his bearing capacity factors, and Meyerhof’s general bearing capacity equation with shape, depth, and inclination factors from Table 6.3.
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).
A square column foundation has to carry a gross allowable load of 1805 kN (FS = 3). Given: Df = 1.5 m, = 15.9 kN/m3, =34, and c = 0. Use Terzaghis equation to determine the size of the foundation (B). The applied load on a shallow square foundation makes an angle of 15 with the vertical. Given: B = 1.83 m, Df = 0.91 m, = 18.08 kN/m3, =25, and c = 23.96 kN/m2. Use FS = 4 and determine the gross allowable (vertical component) load. Use Eq. (16.9).
A continuous foundation with a width of 1 m is located on a slope made of clay soil. Refer to Figure 5.19 and let Df = 1 m, H = 4 m, b = 2 m, γ = 16.8 kN/m3, c = cu = 68 kN/m2, Φ= 0, and β = 60°.a. Determine the allowable bearing capacity of the foundation. Let FS = 3.b. Plot a graph of the ultimate bearing capacity qu if b is changed from 0 to 6 m.
A 3 m thick clay layer (cu = 50 kN/m2 and γ = 19.0 kN/m3) is underlain by a weaker clay (cu = 30 kN/m2 and γ = 18.0 kN/m3) to a large depth. A 2.0 m wide square foundation is placed at 1.8 m depth below the ground level. Determine the maximum column load that can be allowed on the foundation with FS = 3.
A 2.0m wide continuous foundation carries a wall load of 350 kN/m in a clayey soil where y 19,0 kN/m', c'= 5 kN/m2 and '= 23°. The foun- dation depth is 1.5 m. Determine the factor of safety of this foundation.
A square foundation is 1.5m x 1.5m in plan. The soil supporting the foundation has a friction angle '=20 and c'=15.2 kN/m². The unit weight of soil is y=17.8 kN/m². Determine the allowable gross load on the foundation with a factor of safety F,=4. Assume that the depth of the foundation D=1m and the general shear failure occur in the soils mass.
A rectangular footing 6 x 3 m carries a uniform pressure of 300 kN/m 2 on the surface of a soil mass. Determine the vertical stress at a depth of 4.5 m below the surface on the center line 1.0 m inside the long edge of the foundation?
A 1m deep foundation is placed on a soil of unit weight 20 kN/m3 and ultimate bearing capacity of 300 kN/m2. Determine the net safe bearing capacity for a factor of safety of 2.5
Calculate the settlement under the center of a flexible foundation 4 m by 4 m due to volume distortions occurring in a saturated clay stratum but where rock exists at a depth 8 m below the foundation. The clay shear strength c is 60 kPa. The total foundation loading imposed onto the soil is 2,400 kN.