Chapter 15, Problem 15.23P

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9th Edition

Braja M. Das + 1 other

ISBN: 9781305970939

Textbook Problem

Repeat Problem 15.22 with the following slope characteristics: 1H:1V, γ *=* 18 kN/m^{3}, *ϕ'* = 18°, *H* = 12 m, and *c'* = 30 kN/m^{2}.

**15.22** Refer to Figure 15.52. Using Taylor’s stability chart (Figure 15.21), determine the factor of safety, *F _{s}*, against sliding for a slope with the following characteristics: 1.75 H: 1 V, γ = 19 kN/m

To determine

Find the factor of safety

Explanation

**Given information:**

The inclination of the slope is

The unit weight

To soil friction angle

The height (*H*) of the retaining wall is 12 m.

The cohesion

**Calculation:**

Determine the inclination angle

Substitute 1 for *y* and 1 for *x*.

Take the angle of friction

Determine the factor of safety

Substitute

Similarly, calculate and tabulate the factor of safety

Determine the cohesion per unit area developed using the relation.

Here, *m* is the stability number.

Refer Figure 15.21 “Taylor’s stability number” in the text book.

Take the stability number as 0.115 when the soil friction angle is

Similarly, take and tabulate the stability number for the remaining angle of friction

Substitute 0.115 for m, *H*

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