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Match the following in Column X with Column Y:
Column X
(P) In a triaxial compression test, with increase of axial strain in loose sand under drained shear condition, the volumetric strain
(Q) In a triaxial compression test, with increase of axial strain in loose sand under undrained shear condition, the excess pore water pressure
(R) In a triaxial compression test, the pore pressure parameter “B” for a saturated soil
(S) For shallow strip footing in pure saturated clay, Terzaghi’s bearing capacity factor (Nq) due to surcharge
Column Y
(I) decreases.
(II) increases.
(III) remains same.
(IV) is always 0.0.
(V) is always 1.0.
(VI) is always 0.5.
Which one of the following combinations is correct?
- (P)-(I), (Q)-(II), (R)-(V), (S)-(V)
- (P)-(II), (Q)-(I), (R)-(IV), (S)-(V)
- (P)-(I), (Q)-(III), (R)-(VI), (S)-(IV)
- (P)-(I), (Q)-(II), (R)-(V), (S)-(VI)
Correct answer: (P)-(I), (Q)-(II), (R)-(V), (S)-(V)
Solution
Loose sand under drained shear contracts so volumetric strain decreases (P-I); undrained it builds positive pore pressure, which increases (Q-II); pore-pressure parameter B for fully saturated soil is 1.0 (R-V); Terzaghi Nq for a strip footing equals 1.0 here (S-V). This is option (a).
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