2008f engi 6723 guest lecture mcafee - triaxial

7/25/2019 2008F ENGI 6723 Guest Lecture McAfee - Triaxial

1/37

Triaxial Testing


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Typical Stress-Strain

Curves for CU Tests

Principal (effective) stressratio is a simple way tonormalize the stress

behaviour with respectto "3during the test


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Typical Stress-Strain

Curves for UU Tests

a)

Remolded and some compacted clays

b) Medium sensitive undisturbed clay

c) Highly sensitive undisturbed clay

Note: max. !"occurs

at relatively low strains


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Typical Mohr failure

envelopes for UU Tests

100% saturated clay

Partially saturated clay

Increased cell pressurecompresses any air voids

All samples have same

water content and voidratio therefore the

same undrained shearstrength


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2008f engi 6723 guest lecture mcafee - triaxial

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