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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

The cross section of a braced cut supporting a sheet pile installation in a clay soil is shown in Figure 14.22. Given: H = 12 m, γclay = 17.9 kN/m3, ϕ = 0, c = 75 kN/m2, and the center-to-center spacing of struts in plan view, s = 3 m.

  1. a. Using Peck’s empirical pressure diagrams, draw the earth-pressure envelope.
  2. b. Determine the strut loads at levels A, B, and C.

images

(a)

To determine

Draw the earth-pressure envelope using Peck’s empirical pressure diagram.

Explanation

Given information:

The unit weight γclay of the clay is 17.9kN/m3.

The soil friction angle ϕ is 0.

The cohesion c is 75kN/m2.

The depth of level A is z=1.5m.

The depth of level B is x=4.5m.

The depth of level C is x=4.5m.

The depth below level C is z=1.5m.

The total depth H is 12 m.

Calculation:

Determine the value of value of γclayHc.

Substitute 17.9kN/m3 for γclay, 12 m for H, and 75kN/m2 for c.

γclayHc=17

To determine

Find the design strut loads at level A, B, and C.

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