Chapter 16, Problem 16.12P

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9th Edition

Braja M. Das + 1 other

ISBN: 9781305970939

Textbook Problem

A square footing is subjected to an inclined load as shown in Figure 16.19. If the size of the footing, *B* = 2.25 m, determine the gross allowable inclined load, *Q*, that the footing can safely carry. Given: *α* = 12° and *F _{s}* = 3.5.

**Figure 16.19**

To determine

Find the gross allowable inclined load (*Q*) that the footing can safely carry.

Explanation

Given information:

The width of footing *B* is 2.25 m.

The unit weight of the soil

The saturated unit weight of the soil

The value of cohesion

The soil friction angle

The depth of foundation

The depth of foundation above the water table *D* is 1 m.

The inclination of the load on the foundation with respect to the vertical

The factor of safety

Calculation:

Determine the shape factor

Here,

Refer Table 16.2, “Bearing-capacity factors

Take the

Substitute 2.25 m for *B*, 2.25 m for *L*, 13.20 for

Determine the depth factor

Substitute 2 m for *B*.

Determine the inclination factor

Substitute

Determine the shape factor

Substitute 2.25 m for *B*, 2.25 m for *L*, and

Determine the depth factor

Substitute *B*.

Determine the shape factor

Substitute 2.25 m for *B* and 2.25 m for *L*.

Determine the inclination factor

Substitute

Determine the magnitude of *q* using the relation.

Here,

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