A square column foundation (Figure 6.12) is to be constructed on a sand deposit. The allowable load Q will be inclined at an angle B = 20° with the vertical. The standard penetration numbers Ngo obtained from the field are as follows. Determine Q. Use Eq. (6.28). FS = 3 Eq. (6.28). qu = c'NFFoaFa + qN‚F„Fq«Fqi + >¥BN,F,„FyaFyi Depth (m) 1.5 3 3.0 6. 4.5 9 6.0 10 7.5 10 9.0 8 20 0.7 m c = 0 y= 18 kN/m? B = 1,25 m H FIGURE 6.12

A square column foundation (Figure 6.12) is to be constructed on a sand deposit. The allowable load Q will be inclined at an angle B = 20° with the vertical. The standard penetration numbers Ngo obtained from the field are as follows. Determine Q. Use Eq. (6.28). FS = 3 Eq. (6.28). qu = c'NFFoaFa + qN‚F„Fq«Fqi + >¥BN,F,„FyaFyi Depth (m) 1.5 3 3.0 6. 4.5 9 6.0 10 7.5 10 9.0 8 20 0.7 m c = 0 y= 18 kN/m? B = 1,25 m H FIGURE 6.12

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter4: Shallow Foundations: Ultimate Bearing Capacity

Section: Chapter Questions

Problem 4.6P

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Consider 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)]
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