Bearing Capacity – shallow foundation

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 TERMS

Foundation requirements

Modes of Failure of Shallow Foundations

Bearing Capacity Analysis

SURFACE FOOTING, B x L = ¥

Choice of Strengths

Simple upper bound for f_u = 0 soils

Solution

The Correct Answer

The Accepted Failure Mechanism

Comment

The General Bearing   Capacity Equation

Limit Equilibrium Analysis

Bearing Capacity Factors

The Bearing Capacity Equation

Variations in the Bearing Capacity Factors between “methods”

Effects of Soil Properties

THE SURCHARGE TERM

Effect of Footing Size

Factor of Safety, q_u to q_safe?

The General Bearing Capacity Eqn.

Effect of depth, D (f_u = 0)

The Influence of a WT

Footing Shape

Eccentricity of Loading

EXAMPLE 8.7From Barnes, (changed slightly)

Problem from Notes

ANSWERs

Inclined Loading

Inclination of Load

CLASS EXAMPLE

Non-Homogeneous Soil

Non-Homogeneous Soil?

Example

Alternative treatment if f_u = 0 soils

Other Factors

SUMMARY

GROUND COVERED

BEARING CAPACITY ON ROCKS

Rock Mass??

Other Considerations

KEY POINT