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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 the retaining wall in Problem 14.1. Estimate the passive force, Pp, per unit length of the wall using Shields and Tolunay’s (1973) method of slices (Table 14.1).

14.1 A retaining wall has a vertical back face with a horizontal granular backfill. Given: H = 6 m, γ = 18.5 kN/m3, ϕ = 40 ° , and δ = 1 2 ϕ . Estimate the passive force, Pp, per unit length of the wall using Terzaghi and Peck’s (1967) wedge theory (Figure 14.4).

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 6.0 m.

The soil friction angle ϕ is 40°.

The unit weight γ of the granular backfill is 18.5kN/m3.

The equation for the angle of wall friction δ is 12ϕ.

Calculation:

Determine the angle of wall friction δ using the relation.

δ=12ϕ

Substitute 40° for ϕ.

δ=12(40°)=20°

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

Pp=12KpγH2

Here, Kp is the passive earth pressure coefficient

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