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Principles of Geotechnical Enginee...

9th Edition
Braja M. Das + 1 other
ISBN: 9781305970939

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BuyFindarrow_forward

Principles of Geotechnical Enginee...

9th Edition
Braja M. Das + 1 other
ISBN: 9781305970939
Textbook Problem

Refer to Figure 14.19. Given: H = 16 ft, θ = 0, α = 0, γ = 119 lb/ft3, ϕ = 30 ° , and δ = 2 3 ϕ . Estimate the passive force, Pp, per unit length of the wall using the Kp values given by Shields and Tolunay’s (1973) method of slices (Table 14.1).

images

Figure 14.19

To determine

Find the passive force Pp per unit length of the wall using Shields and Tolunay’s method of slices.

Explanation

Given information:

The height (H) of the retaining wall is 16 ft.

The soil friction angle ϕ is 30°.

The angle θ is 0.

The angle α is 0.

The unit weight γ of the granular backfill is 119lb/ft3.

Calculation:

Determine the angle of wall friction δ using the relation.

δ=23ϕ

Substitute 30° for ϕ.

δ=23(30°)=20°

Calculate passive force Pp per unit length of the wall using passive earth pressure coefficient Kp given by Shields and Tolunay’s method of slices.

Pp=12KpγH2

Refer Table 14

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