Chapter 16, Problem 16.17P

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9th Edition

Braja M. Das + 1 other

ISBN: 9781305970939

Textbook Problem

A square footing on sand is subjected to an eccentric load as shown in Figure 16.20. Using Meyerhof’s *effective area* concept, determine the gross allowable load that the footing could carry with *F _{s} =* 4. Given: γ = 16 kN/m

Redo Problem 16.16 with the following data: γ = 118 lb/ft^{3}, *c*′ = 700 lb/ft^{2}, *ϕ*′ *=* 33°, *D _{f} =* 4.5 ft,

To determine

Find the gross allowable load that the footing could carry using the effective area concept.

Explanation

Given information:

The unit weight of the soil

The value of cohesion

The soil friction angle

The location of depth of footing base

The width of the footing *B* is 6.25 ft.

The value of eccentricity *x* is 0.75 ft.

The factor of safety value

Calculation:

Determine the effective width of the footing using the relation.

Substitute 6.25 ft for *B* and 0.75 ft for *x*.

The effective length of the footing is taken as the larger value of

Determine the shape factor

Here,

Refer Table 16.2, “Bearing-capacity factors

For

The value of

Substitute 4.75 ft for

Determine the depth factor

Substitute 4.5 ft for

Determine the shape factor

Substitute 4.75 ft for

Determine the depth factor

Substitute

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