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6- Which test is more suitable to analyse the short-term behaviour of a foundation on a...

6- Which test is more suitable to analyse the short-term behaviour of a foundation on a saturated clay (a) Consolidated Drained test (b) Unconsolidated Undrained test (c) Unconfined Compression test (d) None of the above

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Answer #1

option C

Unconfined Compression test to analyse the short-term behaviour of a foundation on a saturated clay

CD Test : - Consolidated drained triaxial test allows drainage to occur both consolidation and shearing Pore water pressure “u=o” because drainage is allowed during both phase.As drainage is allowed, the pore pressure will be slowly dissipates. Therefore, it takes long time to be done

Unconsolidated Undrained test :- The sample is tested without allowing consolidation prior to the test (hence unconsolidated), and during the test no drainage is allowed (hence undrained).This is also a quick test, as it is undrained.

UCS test : - The unconfined compression test is by far the most popular method of soil shear testing because it is one of the fastest and cheapest methods of measuring shear strength. The method is used primarily for saturated, cohesive soils

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