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Lecture 4 Shallow Foundations Allowable Bearing Capacity and Settlement

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allowable settlement

qFS

q orq

SettlementElastic (immediate settlement)+Consolidation (primary and secondary settlement)

Lecture • Calculation of Stress Distribution (Elastic Solution)• Settlement calculation (Elastic Solution)• Settlement of Sands and Clays• Allowable bearing capacity based on settlement

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Lecture 5 Shallow Foundations Allowable Bearing Capacity and Settlement

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Lecture 5 Shallow Foundations Allowable Bearing Capacity and Settlement

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Stress Distribution(Elastic Solution)

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Stress Distribution and Settlement (Elastic Solution) General Idea

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Stress Distribution (Elastic Solution)

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Stress Distribution (Point Load)

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Stress Distribution (Circular Load)

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Stress Distribution (Rectangular Load)

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Stress Distribution (Strip Load)

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Stress Distribution (Elastic Solution)

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Stress Distribution (Elastic Solution)

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Stress Distribution (Approximate Solution)

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Stress Distribution (Elastic Solution)

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Stress Distribution (Elastic Solution)

No WeightNo water

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Elastic Settlement

dzE

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yxz 01

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Elastic Settlement – Circular Foundation

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Strain Influence Factor

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Elastic Settlement – Rectangular Foundation

For L/B = 1 I = 0.56

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Elastic Settlement – Rectangular Foundation

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Elastic Settlement

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Settlement – Additional Considerations

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Settlement – Additional Considerations

Textbook 0.93(p. 227)

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Elastic Settlement Influence Factor

정방형

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Settlement – Additional Considerations

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Settlement – Additional Considerations

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Settlement – Additional Considerations

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Settlement – Additional Considerations

Can estimate from geophysical tests!

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Settlement – Additional Considerations

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Settlement – Additional Considerations구조물기초설계기준 해설 (2009)

NC Clay: 200 ~ 500 suOC Clay: 750 ~ 1000 su

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Settlement – Additional Considerations