Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Textbook Question
Chapter 16, Problem 16.16P
For the mat in Problem 16.15, what will be the depth, Df, of the mat for FS = 3 against bearing capacity failure?
16.15 Consider a mat foundation with dimensions of 18 m × 12 m. The combined dead and live load on the mat is 44.5 MN. The mat is to be placed on a clay with cu = 40.7 kN/m2 and γ = 17.6 kN/m3. Find the depth, Df, of the mat for a fully compensated foundation.
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Chapter 16 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
Ch. 16 - Prob. 16.1PCh. 16 - A 2.0 m wide continuous foundation carries a wall...Ch. 16 - Determine the maximum column load that can be...Ch. 16 - A 2.0 m wide strip foundation is placed in sand at...Ch. 16 - A square column foundation has to carry a gross...Ch. 16 - The applied load on a shallow square foundation...Ch. 16 - A column foundation (Figure 16.23) is 3 m 2 m in...Ch. 16 - Prob. 16.8PCh. 16 - A 2 m 3 m spread foundation placed at a depth of...Ch. 16 - An eccentrically loaded foundation is shown in...
Ch. 16 - For an eccentrically loaded continuous foundation...Ch. 16 - The shallow foundation shown in Figure 16.12...Ch. 16 - A mat foundation measuring 14 m 9 m has to be...Ch. 16 - Repeat Problem 16.13 with the following: Mat...Ch. 16 - Prob. 16.15PCh. 16 - For the mat in Problem 16.15, what will be the...Ch. 16 - Prob. 16.17CTPCh. 16 - Prob. 16.18CTPCh. 16 - A 2.0 m 2.0 m square pad footing will be placed...
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- 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_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_forwardA 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).arrow_forward
- 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.arrow_forwardA continuous foundation having a width of 1.4 m is supported by a saturated clay layer of limited depth underlain by a rock layer. Given that Df = 1 m, H = 0.7 m, cu = 105 kN/m2, and γ = 18 kN/m3, estimate the ultimate bearing capacity of the foundation.arrow_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_forward
- A square column foundation has to carry a gross allowable load of 1805 kN ( FS = 3). Given: D f = 1.5 m, γ = 15.9 kN/m 3 , ϕ ′ = 34 ° , and c ′ = 0. Use Terzaghi's 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.arrow_forwardA 2.0 m wide square foundation is placed at 0.5 m depth ina saturated clay where cu= 40 kN/m2 and delta=19.0 kN/m3 .There is a very stiff stratum present at 1.0 m below the foundation. Determine the ultimate bearing capacity using Buisman’s (1940) equation.arrow_forwardA circular ring foundation for an overhead tank transmits a contact pressure of 300 kN/m2 .Its internal diameter is 6 m and external diameter 10m. Compute the vertical stress on thecenter line of the footing due to the imposed load at a depth of 6.5 m below the groundlevel. The footing is founded at a depth of 2.5 m. In above, if the foundation for the tank is a raft of diameter 10 m, determine the vertical stress at 6.5 m depth on the center line of the footing. All the other data remain the same.arrow_forward
- 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.arrow_forwardA 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 kN/m2 and =23. The foundation depth is 1.5 m. Determine the factor of safety of this foundation.arrow_forward
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