Principles of Foundation Engineering (MindTap Course List)
8th Edition
ISBN: 9781305081550
Author: Braja M. Das
Publisher: Cengage Learning
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Chapter 4, Problem 4.2P
A square column foundation has to carry a gross allowable load of 1805 kN (FS = 3). Given: Df = 1.5 m, γ =15.9 kN/m3, ϕ′ = 34°, and c′ = 0. Use Terzaghi’s equation to determine the size of the foundation (B). Assume general shear failure.
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3. A square foundation is constructed in a soil deposit as shown in the figure below. Assume
that the groundwater table is 6 meters below the foundation. The applied load on the shallow
allowable load. (Use general bearing capacity equation.)
square foundation makes an angle of 10° with the vertical. Use FS
3 and determine the
2 m
6 m
4 m
y = 17.5 kN/m³
4' = 33°
c' = 20 kN/m²
Ysat =
20k N/m³
Groundwater table
3. A square foundation is constructed in a soil deposit as shown in the figure below. Assume
that the groundwater table is 6 meters below the foundation. The applied load on the shallow
square foundation makes an angle of 10° with the vertical. Use FS = 3 and determine the
allowable load. (Use general bearing capacity equation.)
2 m
6 m
4 m
y = 17.5 kN/m³
p' = 33°
c' = 20 kN/m²
Ysat =
20k N/m³
Groundwater table
A column foundation is 3m x 2m in plan. Given: Df= 1.5 m, ’=25, c=70kN/m2 .
(a) Using Terzaghi’s bearing capacity theory and FS=3, determine the net allowable load the foundation could carry.
(b) Use the general bearing capacity equation to determine the net allowable load the foundation could carry.
Chapter 4 Solutions
Principles of Foundation Engineering (MindTap Course List)
Ch. 4 - For the following cases, determine the allowable...Ch. 4 - A square column foundation has to carry a gross...Ch. 4 - Prob. 4.3PCh. 4 - The applied load on a shallow square foundation...Ch. 4 - A column foundation (Figure P6.9) is 3 m × 2 m in...Ch. 4 - Prob. 4.6PCh. 4 - For the design of a shallow foundation, given the...Ch. 4 - An eccentrically loaded foundation is shown in...Ch. 4 - Prob. 4.9PCh. 4 - For an eccentrically loaded continuous foundation...
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- A square column foundation has to carry a gross allowable load of 1805 kN ( FS = 3). Given: D f = 1.4 m, γ = 15.4 kN/m 3 , ϕ ′ = 34 ° , and c ′ = 0. Use Terzaghi's equation to determine the size of the foundation ( B ). Assume general shear failure.arrow_forward3. A square foundation is constructed in a soil deposit as shown in the figure below. Assume that the groundwater table is 6 meters below the foundation. The applied load on the shallow square foundation makes an angle of 10° with the vertical. Use FS = 3 and determine the allowable load. (Use general bearing capacity equation.) 6m 4 m y = 17.5 kN/m³ ' = 33° c' = 20 kN/m² Ysat = 20k N/m³ Groundwater tablearrow_forwardFor the following cases, determine the allowable gross vertical load-bearing capacity of the foundation. Use Terzaghi’s equation and assume general shear failure in soil. Use FS=4. B = 1.5 m Df = 1.2 m Φ' = 35° c' = 0 specific weight of the soil = 17.8 kN/m^3 Foundation Type = Continuousarrow_forward
- Consider a continuous foundation of width B = 1.4 m on a sand deposit with c' = 0, Φ' = 38° and γ = 17.5 kN/m3. The foundation is subjected to an eccentrically inclined load (see Figure 4.31). Given: load eccentricity e = 0.15 m, Df = 1 m, and load inclination β = 18°. Estimate the failure load Qu(ei) per unit length of the foundation a. for a partially compensated type of loading [Eq. (4.85)] b. for a reinforced type of loading [Eq. (4.86)]arrow_forwardA 2.0 m wide strip foundation is placed in sand at 1.0 m depth. The properties of the sand are: y = 19.5 kN/m³, c' = 0, and o' = 34°. Determine the maximum wall load that the foundation can carry, with a factor of safety of 3.0, using a. Terzaghi's original bearing capacity equation with his bearing capacity factors, and b. Meyerhof's general bearing capacity equation with shape, depth, and inclination factors from Table 6.3. 6.8 %3Darrow_forwardQuestion 2) For a shallow foundation shown below: A. Estimate the ultimate bearing capacity when the water table located at a depth of 2 m below the ground surface. B. Estimate the moments about the x- and y-axis; assume that the foundation is subjected to a vertical load and a moment. If eg and eL is 0.33 m and 0.12 m, respectively. G.S Iz 2 m (2 m x 3 m) Silty clay Yo=17 kN/m³ , Ysat = 20 kN/m3 %3D 6 m c'=78 kN/m? 0'=35° Shear modulus=250 kN/m? CS Scanned with CamScannerarrow_forward
- For the following cases, determine the allowable gross vertical load-bearing capacity of the foundation. Use Terzaghi’s equation and assume general shear failure in soil. Use FS=4. B = 3 m Df = 2 m Φ' = 30° c' = 0 specific weight of the soil = 16.5 kN/m^3 Foundation Type = Squarearrow_forwardA 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.arrow_forwardFor the following cases, determine the allowable gross vertical load-bearing capacity of the foundation. Use the general bearing capacity equation. Use FS=4. B = 1.5 m Df = 1.2 m Φ' = 35° c' = 0 specific weight of the soil = 17.8 kN/m^3 Foundation Type = Continuousarrow_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 3m x 2m in plan. Given: Df= 1.5 m, ’=25, c=70kN/m2. FS=3. Use the general bearing capacity equation to determine the netallowable load the foundation could carry.arrow_forward1. For the following cases, determine the allowable gross vertical load bearing capacity of the foundation. Use Terzaghi's equation. Part В D; Foundation Type 3 ft 3 ft 28° 400 psf 110 pcf Continuous a b 1.5 m 1.2 m 35° 17.8 kN/m³ Continuous 3 m 30° 30° 16.5 kN/m³ Square 2. A square foundation has to carry gross allowable load of 1805 kN (FS=3). Given: D; = 1.5 m, y=15.9 kN/m³, 0=34°, and c = 0. Use Terzaghi's equation to determine the size of the foundation (B).arrow_forward
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