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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

For the infinite slope shown in Figure 15.46, determine the height, H, for critical equilibrium. Given: β = 27°, γ = 122 lb/ft3, ϕ = 18 ° , and c′ = 750 lb/ft2.

images

Figure 15.46

To determine

Find the height for critical equilibrium Hcr of the soil-rock interface.

Explanation

Given information:

The slope rise at an angle β with the horizontal line is 27°.

The unit weight γ of the soil is 122lb/ft3.

The angle of friction ϕ is 18°.

The cohesion c is 750lb/ft2.

Calculation:

Determine the height for critical equilibrium of the soil-rock interface using the formula.

Hcr=cγ1cos2β(tanβtanϕ)

Substitute 750lb/ft2 for <

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