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 4.6P
To determine
Find the size of the foundation.
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H.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.
For a square foundation that is B X B in plan, Df= 2 m; vertical gross allowable load, Qall= 3330 kN; γ= 16,5 kN/m3; φ’= 30°; c’ = 0; and FS= 4. Determine the size of the foundation. Use Eq (16.9)
For a square foundation, according to the information given and the assumption
of vertical load, it is desirable to determine the dimensions of the foundation.
Use the general formula.
D, = 2 m; Qa = 3330 kN, y = 16.5 kN/m'; 6' = 30°; c' = 0; and FS 4.
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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- For a square foundation that is B × B in plan, D¡ = 2 m; vertical gross allowable load, Qall 3.6 = 3330 kN, y 16.5 kN/m³; ø' = 30°; c' 0; and FS = 4. Determine the size of the foundation. Use Eq. (3.19).arrow_forwardFor a square foundation that is B x B in plan, Df. = 2 m; vertical grossallowable load, Qall =3330kN, γ [gamma] =16.5 kN/m3; Φ=30; c= 0; and FS= 4. Determine the size of the foundation.arrow_forward4.6 For a square foundation that is B X B in plan, D, = 2 m; vertical gross allowable load, Qall = 3330 kN, y = 16.5 kN/m³; ' = 30°; c' = 0; and FS = 4. Determine the size of the foundation. Use Eq. (4.26).arrow_forward
- 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.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 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 tablearrow_forwardA column foundation (Figure P3.5) is 3 m x 2 m in plan. Given: D; = 2 m, o' = 25°, c' = 50 kN/m². Using Eq. (3.23) and FS = 4, determine the net allowable load [see Eq. (3.15)] the foundation could carry. Use bearing capac- ity, shape, and depth factors given in Şection 3.6.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 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.arrow_forwardProb. 3): A square shallow foundation is shown below. If the load eccentricity is 0.3 m, determine the maximúm allowable load that the foundation can carry. Use Mayerhof's method, and FS as 4. (Eccentricity in one direction only) e = 0.3 m Qal Y = 16.3 kN/m3 c' = 20 kN/m? p'=28° 1.0 m 1.5 m X 1.5 m Centerlinearrow_forward
- Problem #3 lơ lag An eccentrically loaded continuous foundation is shown in (Eccentricity in one direction only) e = 0.15 m I Qall y = 17 kN/m³ c' = 0 4'= 36° the figure. Determine the maximum allowable load (Qall) 1.0 m that the foundation can carry. Use Meyerhof's effective area method and FS of 4. B = 2 m Solution: Centerlinearrow_forwardA column foundation as can be seen in the bottom, is 3mx2min plane with Df = 2 m, ø' = 25, c’ = 50 kN/m2. Considering FS = 4 determine the net allowable load. The foundation could carry. (Use general equation)arrow_forward5.6 For a square foundation that is B X B in plan, D, = 2 m; ver- tical gross allowable load Qall 3330 kN, y = 16.5 kN/m³, o'= 30°, and c'= 0; and FS = 4, Determine the size of the foundation. Use Eq. (5.30).arrow_forward
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