Principles of Foundation Engineering
9th Edition
ISBN: 9780357684832
Author: Das
Publisher: Cengage Learning US
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Chapter 6, Problem 6.5P
The applied load on a shallow square foundation makes an angle of 20° with the vertical. Given: B = 5 ft, Df = 3 ft, γ = 115 lb/ft3, ф′ = 25°, and c′ = 600 lb/ft2. Use FS = 3 and determine the gross inclined allowable load. Use Eq. (6.28).
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The applied load on a shallow square foundation makes an angle of 15° with
the vertical. Given: B = 5.5 ft, D; = 4 ft, y
350 lb/ft?. Use FS = 4 and determine the gross allowable load. Use Eq.
(3.23). Use the bearing capacity, shape, depth, and inclination factors given in
Section 3.6.
= 107 lb/ft', ø' = 25°, and c' =
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.)
6m
4 m
y = 17.5 kN/m³
' = 33°
c' = 20 kN/m²
Ysat = 20k N/m³
Groundwater table
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).
Chapter 6 Solutions
Principles of Foundation Engineering
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- 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 tablearrow_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
- A strip foundation is design to carry 750 kN/m with width of footer 3m, assuming depth of foundation is 1.5m and the soil underlying the foundation is clayey sand. Take ? = 16kN/m3, c = 9.5 kPa and ϕ = 32o.Find the factor of safety against bearing capacity failure.arrow_forward" (a) Qu 1 Qu 3 B (b) M M → X M Qu M (c) Figure 4.24 Analysis of foundation with two-way eccentricity 7 = 17kN/m³ friction angle = : 35⁰° , and cohesion c = 0 Qu (d) The shallow foundation is shown in Figure 4.24 measures 1.5 m X 2.25 m and is subjected to a centric load and a moment. If ев = = 0.12m e₁ eL = 0.36m and the depth of the foundation is 0.8 m, determine the allowable load the foundation can carry. Use a factor of safety of 4. For the soil, we are told that unit weightarrow_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.) 2 m 6 m 4 m y = 17.5 kN/m³ p' = 33° c' = 20 kN/m² Ysat = 20k N/m³ Groundwater tablearrow_forward
- 1. A rectangular foundation is 3 m x 4m in plan is acted upon by a inclined force of 50 kN at an angle of 15° to the vertical. The soil supporting the foundation has a friction angle of '=27° and c'=22 kN/m². The unit weight of soil is 18kN/m³. Determine the allowable gross load on the foundation with a factor of safety of 3. Assume that the depth of the foundation is 2 m, depth of water table 3.5 m and that local shear failure occurs in the soil. Use general Bearing Capacity equation and Mayerhoff, Hansen's and IS 6403-1981 bearing capacity factors separately to calculate bearing capacity. State your assumption in case any.arrow_forwardFor 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.arrow_forwardThe 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, c’ = 23.96 and ’ = 25. Use FS = 4 and determine the gross allowable (vertical component) load.arrow_forward
- Question 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_forwardA square foundation is 1.5 m x 1.5 m in plan. The soil supporting the foundation has a friction angle = 32 deg. and c = 21 kPa. The unit weight of soil is 17.5 kN/m3. Assume that the depth of foundation Df is 1 meter, Use Nc = 44.14 ; Nq = 28.52 and N? = 26.87. a).Determine the allowable bearing capacity on the foundation with a factor of safety of 3.0 b.)Determine the allowable gross load on the foundation with a factor of safety of 4.0 .arrow_forwardFor a shallow foundation shown below: 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 Yd=17 kN/m³ , Ysat = 20 kN/m³ %3D 6 m c'=78 kN/m? þ'=35° Shear modulus=250 kN/m? CS Scanned with CamScannerarrow_forward
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