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Soil ConsolidationPart 2

KAEA 3233 - SOIL MECHANICS II

Department of Civil Engineering

Faculty of Engineering

University of Malaya

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Settlement from Primary Consolidation

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Settlement from Primary Consolidation

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Settlement from Primary Consolidation

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Settlement from Primary Consolidation

Normally consolidated clay

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Settlement from Primary Consolidation

Overconsolidated clay

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Compression Index (Cc) and Swelling Index (Cs)

where LL liquid limit (%).

Skempton (1944) suggested empirical expressions for the compression index.

For undisturbed clays:

For remolded clays:

Compression Index (Cc)

Swelling Index (Cs)

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Example 2

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Example 3

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Example 4

 A soil profile is shown in (a). Laboratory consolidation tests were conducted on a specimencollected from the middle of the clay layer. The field consolidation curve interpolated fromthe laboratory test results is shown in (b). Calculate the settlement in the field caused by

primary consolidation for a surcharge of 48 kN/m2 applied at the ground surface.

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Settlement from Secondary Consolidation

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Settlement from Secondary Consolidation

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Example 5

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 Answer