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Structural Concrete - Hassoun

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522 Chapter 14 Retaining Walls<br />

Figure 14.23<br />

Problem 14.11: Basement wall.<br />

friction is φ = 35 ∘ , the coefficient of friction between concrete and soil is 0.52 and that between soil<br />

layers is 0.70. Use f c ′ = 3ksi,f y = 60 ksi, an allowable soil pressure of 4 ksf, and a surcharge of 300 psf.<br />

14.10 Repeat Problem 14.9, assuming the backfill slopes at 30 ∘ to the horizontal.<br />

14.11 Determine the thickness and necessary reinforcement for the basement wall shown in Fig. 14.23. The<br />

weight of backfill is 120 pcf and the angle of internal friction is φ = 30 ∘ . Assume a surcharge of 400 psf<br />

and use f c ′ = 3ksiandf y = 60 ksi.<br />

14.12 Repeat Problem 14.11 using a basement clear height of 14 ft.

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